Basic Stamp Alarm Clock Project- Control Audio Levels?
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Posts: 46,084
Ok, I have a project I've been slowly advancing over time, and I thought
I would throw my two pondering points out to see if someone can give me a
shove in the right direction.
Background: I have a Basic Stamp II with a Serial LCD module and the
Pocketwatch unit, all from Parallax. I have it configured as a basic
bedside alarm clock. Yeah, I know I could have gotten one for a lot less
$$$, but it was a fun project to learn about the stamp when I was
building a robot for my son (http://www.robocide.com) and when I finished
with the BSII I ended up needing more horsepower so I got a IIsx that
went into the robot so I had some spare parts and... but I digress... [noparse]:)[/noparse]
Pondering Point 1: I have envisioned moving the "alarm clock" project
forward by having it control the volume of a radio/cd/mp3 player. The
idea would be to have the stamp slowly fade the sound in when the alarm
goes off rather than just closing a relay and blasting me out of bed, as
it does now. [noparse]:)[/noparse] I was toying with using the PWM out of the BSII to a cap
that then slowly bias a transistor or....?, but before I went down that
path, I wanted to see if anyone else has used a stamp to control an audio
volume source, and if so might they be willing to share a schematic to
keep me from re-inventing the wheel?
For all I know there may be a One Wire or Scott Edwards widget called a
"Serial Sound Controller" that I could just put in line and be done! [noparse]:)[/noparse]
Pondering Point 2: I like to sleep with "White Noise" playing in my room
to make my sleep more stable. (For those of you interested, white noise
like rain sounds or waterfalls raise the "noise floor" that your mind
uses as the threshold for what is loud enough to require your attention.
Makes it easier to sleep through the night in the event that your spouse
rises for the call of nature or the cat knocks over your son's large
Power Ranger Action Figure in the middle of the night!)
Anyway, I have an old analog unit that makes very good white noise. I
wanted to have a 2nd unit to use when I traveled, so I bought one form
the Sharper Image company. Unfortunately, this unit uses a digital
generator that isn't as "random" as the analog unit I have and I can hear
"loop" points in the noise that are very distracting when trying to fall
asleep.
So, since I would like to add some audio to my Basic Stamp Alarm Clock, I
thought about including a white noise generator in the new design as
another source for the stamp to control. For example, fade out the white
noise while fading in the music. So, has anyone used the stamp to create
white noise directly or does anyone have a circuit design that creates
"analog" white noise the stamp could subsequently control?
Any feedback/questions/suggestions humbly received. TIA! [noparse]:)[/noparse]
Vern
--
Vern Graner CNE/CNA/SSE | "If the network is down, then you're
Senior Systems Engineer | obviously incompetent so why are we
Texas Information Services | paying you? Of course, if the network
vern@t... www.txis.com | is up, then we obviously don't need
Cell 507-7851 Desk 328-8947 | you, so why are we paying you?" VLG
I would throw my two pondering points out to see if someone can give me a
shove in the right direction.
Background: I have a Basic Stamp II with a Serial LCD module and the
Pocketwatch unit, all from Parallax. I have it configured as a basic
bedside alarm clock. Yeah, I know I could have gotten one for a lot less
$$$, but it was a fun project to learn about the stamp when I was
building a robot for my son (http://www.robocide.com) and when I finished
with the BSII I ended up needing more horsepower so I got a IIsx that
went into the robot so I had some spare parts and... but I digress... [noparse]:)[/noparse]
Pondering Point 1: I have envisioned moving the "alarm clock" project
forward by having it control the volume of a radio/cd/mp3 player. The
idea would be to have the stamp slowly fade the sound in when the alarm
goes off rather than just closing a relay and blasting me out of bed, as
it does now. [noparse]:)[/noparse] I was toying with using the PWM out of the BSII to a cap
that then slowly bias a transistor or....?, but before I went down that
path, I wanted to see if anyone else has used a stamp to control an audio
volume source, and if so might they be willing to share a schematic to
keep me from re-inventing the wheel?
For all I know there may be a One Wire or Scott Edwards widget called a
"Serial Sound Controller" that I could just put in line and be done! [noparse]:)[/noparse]
Pondering Point 2: I like to sleep with "White Noise" playing in my room
to make my sleep more stable. (For those of you interested, white noise
like rain sounds or waterfalls raise the "noise floor" that your mind
uses as the threshold for what is loud enough to require your attention.
Makes it easier to sleep through the night in the event that your spouse
rises for the call of nature or the cat knocks over your son's large
Power Ranger Action Figure in the middle of the night!)
Anyway, I have an old analog unit that makes very good white noise. I
wanted to have a 2nd unit to use when I traveled, so I bought one form
the Sharper Image company. Unfortunately, this unit uses a digital
generator that isn't as "random" as the analog unit I have and I can hear
"loop" points in the noise that are very distracting when trying to fall
asleep.
So, since I would like to add some audio to my Basic Stamp Alarm Clock, I
thought about including a white noise generator in the new design as
another source for the stamp to control. For example, fade out the white
noise while fading in the music. So, has anyone used the stamp to create
white noise directly or does anyone have a circuit design that creates
"analog" white noise the stamp could subsequently control?
Any feedback/questions/suggestions humbly received. TIA! [noparse]:)[/noparse]
Vern
--
Vern Graner CNE/CNA/SSE | "If the network is down, then you're
Senior Systems Engineer | obviously incompetent so why are we
Texas Information Services | paying you? Of course, if the network
vern@t... www.txis.com | is up, then we obviously don't need
Cell 507-7851 Desk 328-8947 | you, so why are we paying you?" VLG
Comments
similar the volume is controlled by a pot. Have the Stamp control the pot.....
For you white noise....why not record the Analog unit via your PC....then burn a
CD? Or use Software to generate White noise...and burn that to CD....[noparse]:)[/noparse]
Does the White Noise really help that much? My office uses it and I it makes me
wonder why the AC is so noisy!
Good luck,
Tim
>>> vern@t... 08/06/03 10:16AM >>>
Ok, I have a project I've been slowly advancing over time, and I thought
I would throw my two pondering points out to see if someone can give me a
shove in the right direction.
Background: I have a Basic Stamp II with a Serial LCD module and the
Pocketwatch unit, all from Parallax. I have it configured as a basic
bedside alarm clock. Yeah, I know I could have gotten one for a lot less
$$$, but it was a fun project to learn about the stamp when I was
building a robot for my son (http://www.robocide.com) and when I finished
with the BSII I ended up needing more horsepower so I got a IIsx that
went into the robot so I had some spare parts and... but I digress... [noparse]:)[/noparse]
Pondering Point 1: I have envisioned moving the "alarm clock" project
forward by having it control the volume of a radio/cd/mp3 player. The
idea would be to have the stamp slowly fade the sound in when the alarm
goes off rather than just closing a relay and blasting me out of bed, as
it does now. [noparse]:)[/noparse] I was toying with using the PWM out of the BSII to a cap
that then slowly bias a transistor or....?, but before I went down that
path, I wanted to see if anyone else has used a stamp to control an audio
volume source, and if so might they be willing to share a schematic to
keep me from re-inventing the wheel?
For all I know there may be a One Wire or Scott Edwards widget called a
"Serial Sound Controller" that I could just put in line and be done! [noparse]:)[/noparse]
Pondering Point 2: I like to sleep with "White Noise" playing in my room
to make my sleep more stable. (For those of you interested, white noise
like rain sounds or waterfalls raise the "noise floor" that your mind
uses as the threshold for what is loud enough to require your attention.
Makes it easier to sleep through the night in the event that your spouse
rises for the call of nature or the cat knocks over your son's large
Power Ranger Action Figure in the middle of the night!)
Anyway, I have an old analog unit that makes very good white noise. I
wanted to have a 2nd unit to use when I traveled, so I bought one form
the Sharper Image company. Unfortunately, this unit uses a digital
generator that isn't as "random" as the analog unit I have and I can hear
"loop" points in the noise that are very distracting when trying to fall
asleep.
So, since I would like to add some audio to my Basic Stamp Alarm Clock, I
thought about including a white noise generator in the new design as
another source for the stamp to control. For example, fade out the white
noise while fading in the music. So, has anyone used the stamp to create
white noise directly or does anyone have a circuit design that creates
"analog" white noise the stamp could subsequently control?
Any feedback/questions/suggestions humbly received. TIA! [noparse]:)[/noparse]
Vern
--
Vern Graner CNE/CNA/SSE | "If the network is down, then you're
Senior Systems Engineer | obviously incompetent so why are we
Texas Information Services | paying you? Of course, if the network
vern@t... www.txis.com | is up, then we obviously don't need
Cell 507-7851 Desk 328-8947 | you, so why are we paying you?" VLG
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I like the idea of using the CD for the source of the white noise, the
only problem is the length of time it takes for my CD to re-start itself
when it repeats. There is a very significant intteruption that defeats
the whole purpose of raising the noise floor. [noparse]:([/noparse] Looks like a circuit
that creates noise is still the best bet since it would allow me to
leverage a stamp-controlled volume system. I did find a schematic that
looks interesting as a source for a white noise generator here:
http://world.std.com/~reinhold/waynesrngcomp.gif
Anyone care to comment on how well this would work and/or advise on how
to build this with a single supply rather than a +/- supply? If thats too
complicated, maybe something similar? I found some pseudo-generators as
well, like this:
http://www.qkits.com/serv/qkits/velleman/pages/k4301.asp
The Vellman P4301 is sold by a few kit makers, but I'm afraid it will
have discernible "loop points" as well. Ideally I'd like to find a
circuit that would leverage the power of the stamp itself, but I don't
know if such a circuit would make truly random noise w/o loop points...
The idea about using motorized pots is cool! I hadn't thought about doing
it that way. I found a few sources for motorized pots surplus in a quick
search, but they're pretty pricey and I wonder if they'll operate
silently? If the motor grinding is louder than the noise then the fade
in/out is kinda blown. I'm still leaning to a solid-state solution... If
I can find one.. [noparse]:)[/noparse]
Vern
--
Vern Graner CNE/CNA/SSE | "If the network is down, then you're
Senior Systems Engineer | obviously incompetent so why are we
Texas Information Services | paying you? Of course, if the network
vern@t... www.txis.com | is up, then we obviously don't need
Cell 507-7851 Desk 328-8947 | you, so why are we paying you?" VLG
Tim Hart said:
> To ramp up or down sound you could use a Motorized POT! With a Simple
> LM386 or similar the volume is controlled by a pot. Have the Stamp
> control the pot.....
>
> For you white noise....why not record the Analog unit via your PC....then
> burn a CD? Or use Software to generate White noise...and burn that to
> CD....[noparse]:)[/noparse]
>
> Does the White Noise really help that much? My office uses it and I it
> makes me wonder why the AC is so noisy!
>
> Good luck,
> Tim
>
>>>> vern@t... 08/06/03 10:16AM >>>
> Ok, I have a project I've been slowly advancing over time, and I thought
> I would throw my two pondering points out to see if someone can give me a
> shove in the right direction.
>
> Background: I have a Basic Stamp II with a Serial LCD module and the
> Pocketwatch unit, all from Parallax. I have it configured as a basic
> bedside alarm clock. Yeah, I know I could have gotten one for a lot less
> $$$, but it was a fun project to learn about the stamp when I was
> building a robot for my son (http://www.robocide.com) and when I finished
> with the BSII I ended up needing more horsepower so I got a IIsx that
> went into the robot so I had some spare parts and... but I digress... [noparse]:)[/noparse]
>
> Pondering Point 1: I have envisioned moving the "alarm clock" project
> forward by having it control the volume of a radio/cd/mp3 player. The
> idea would be to have the stamp slowly fade the sound in when the alarm
> goes off rather than just closing a relay and blasting me out of bed, as
> it does now. [noparse]:)[/noparse] I was toying with using the PWM out of the BSII to a cap
> that then slowly bias a transistor or....?, but before I went down that
> path, I wanted to see if anyone else has used a stamp to control an audio
> volume source, and if so might they be willing to share a schematic to
> keep me from re-inventing the wheel?
>
> For all I know there may be a One Wire or Scott Edwards widget called a
> "Serial Sound Controller" that I could just put in line and be done! [noparse]:)[/noparse]
>
> Pondering Point 2: I like to sleep with "White Noise" playing in my room
> to make my sleep more stable. (For those of you interested, white noise
> like rain sounds or waterfalls raise the "noise floor" that your mind
> uses as the threshold for what is loud enough to require your attention.
> Makes it easier to sleep through the night in the event that your spouse
> rises for the call of nature or the cat knocks over your son's large
> Power Ranger Action Figure in the middle of the night!)
>
> Anyway, I have an old analog unit that makes very good white noise. I
> wanted to have a 2nd unit to use when I traveled, so I bought one form
> the Sharper Image company. Unfortunately, this unit uses a digital
> generator that isn't as "random" as the analog unit I have and I can hear
> "loop" points in the noise that are very distracting when trying to fall
> asleep.
>
> So, since I would like to add some audio to my Basic Stamp Alarm Clock, I
> thought about including a white noise generator in the new design as
> another source for the stamp to control. For example, fade out the white
> noise while fading in the music. So, has anyone used the stamp to create
> white noise directly or does anyone have a circuit design that creates
> "analog" white noise the stamp could subsequently control?
>
> Any feedback/questions/suggestions humbly received. TIA! [noparse]:)[/noparse]
>
> Vern
>
> --
> Vern Graner CNE/CNA/SSE | "If the network is down, then you're
> Senior Systems Engineer | obviously incompetent so why are we
> Texas Information Services | paying you? Of course, if the network
> vern@t... www.txis.com | is up, then we obviously don't need
> Cell 507-7851 Desk 328-8947 | you, so why are we paying you?" VLG
>
>
>
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>
>
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>
>
>
>
> To UNSUBSCRIBE, just send mail to:
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>
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>
>
>
> I would throw my two pondering points out to see if someone can give me a
> shove in the right direction.
>
> Background: I have a Basic Stamp II with a Serial LCD module and the
> Pocketwatch unit, all from Parallax. I have it configured as a basic
> bedside alarm clock. Yeah, I know I could have gotten one for a lot less
> $$$, but it was a fun project to learn about the stamp when I was
> building a robot for my son (http://www.robocide.com) and when I finished
> with the BSII I ended up needing more horsepower so I got a IIsx that
> went into the robot so I had some spare parts and... but I digress... [noparse]:)[/noparse]
>
> Pondering Point 1: I have envisioned moving the "alarm clock" project
> forward by having it control the volume of a radio/cd/mp3 player. The
> idea would be to have the stamp slowly fade the sound in when the alarm
> goes off rather than just closing a relay and blasting me out of bed, as
> it does now. [noparse]:)[/noparse] I was toying with using the PWM out of the BSII to a cap
> that then slowly bias a transistor or....?, but before I went down that
> path, I wanted to see if anyone else has used a stamp to control an audio
> volume source, and if so might they be willing to share a schematic to
> keep me from re-inventing the wheel?
How about a digital pot ? Parallax uses them in one of the Stamps
In Class curriculums. Ideally, you'd want one with log taper, but
under the control of a Stamp, I'm sure you could get around it.
Mark Hillier, VE6HVW
President, HVW Technologies Inc.
Canadian Distributors of Parallax Products and other Neat Stuff
Tel: (403)-730-8603 Fax: (403)-730-8903
http://www.HVWTech.com
** New Breadboard Voltage Regulator (BVR) -A plugable +5 Volt
power supply !
reception.
For an analog fader, try a 2n7000 mosfet with a large cap (say 1000uf) connected
from Source to Gate, Gate fed through a resistor
(say 100k) from the stamp. Connect a 10 ohm or larger resistor from the audio
source to the Drain pin and take audio out from there.
When the stamp pin goes high it will slowly attenuate the audio, when driven low
it will slowly return to full audio out.
noise 'cancellators' or whatever they are called...white noise is harsher,
rather unpleasant to listen to, pink noise is closer to surf sounds...I
have been using it to block out tens of students practising simultaneously
in the music across the street of a room where I do a lot of reading
guy
At 11:50 AM 8/6/2003 -0400, you wrote:
>To ramp up or down sound you could use a Motorized POT! With a Simple
>LM386 or similar the volume is controlled by a pot. Have the Stamp
>control the pot.....
>
>For you white noise....why not record the Analog unit via your PC....then
>burn a CD? Or use Software to generate White noise...and burn that to CD....[noparse]:)[/noparse]
>
>Does the White Noise really help that much? My office uses it and I it
>makes me wonder why the AC is so noisy!
>
>Good luck,
>Tim
>
> >>> vern@t... 08/06/03 10:16AM >>>
>Ok, I have a project I've been slowly advancing over time, and I thought
>I would throw my two pondering points out to see if someone can give me a
>shove in the right direction.
>
>Background: I have a Basic Stamp II with a Serial LCD module and the
>Pocketwatch unit, all from Parallax. I have it configured as a basic
>bedside alarm clock. Yeah, I know I could have gotten one for a lot less
>$$$, but it was a fun project to learn about the stamp when I was
>building a robot for my son (http://www.robocide.com) and when I finished
>with the BSII I ended up needing more horsepower so I got a IIsx that
>went into the robot so I had some spare parts and... but I digress... [noparse]:)[/noparse]
>
>Pondering Point 1: I have envisioned moving the "alarm clock" project
>forward by having it control the volume of a radio/cd/mp3 player. The
>idea would be to have the stamp slowly fade the sound in when the alarm
>goes off rather than just closing a relay and blasting me out of bed, as
>it does now. [noparse]:)[/noparse] I was toying with using the PWM out of the BSII to a cap
>that then slowly bias a transistor or....?, but before I went down that
>path, I wanted to see if anyone else has used a stamp to control an audio
>volume source, and if so might they be willing to share a schematic to
>keep me from re-inventing the wheel?
>
>For all I know there may be a One Wire or Scott Edwards widget called a
>"Serial Sound Controller" that I could just put in line and be done! [noparse]:)[/noparse]
>
>Pondering Point 2: I like to sleep with "White Noise" playing in my room
>to make my sleep more stable. (For those of you interested, white noise
>like rain sounds or waterfalls raise the "noise floor" that your mind
>uses as the threshold for what is loud enough to require your attention.
>Makes it easier to sleep through the night in the event that your spouse
>rises for the call of nature or the cat knocks over your son's large
>Power Ranger Action Figure in the middle of the night!)
>
>Anyway, I have an old analog unit that makes very good white noise. I
>wanted to have a 2nd unit to use when I traveled, so I bought one form
>the Sharper Image company. Unfortunately, this unit uses a digital
>generator that isn't as "random" as the analog unit I have and I can hear
>"loop" points in the noise that are very distracting when trying to fall
>asleep.
>
>So, since I would like to add some audio to my Basic Stamp Alarm Clock, I
>thought about including a white noise generator in the new design as
>another source for the stamp to control. For example, fade out the white
>noise while fading in the music. So, has anyone used the stamp to create
>white noise directly or does anyone have a circuit design that creates
>"analog" white noise the stamp could subsequently control?
>
>Any feedback/questions/suggestions humbly received. TIA! [noparse]:)[/noparse]
>
>Vern
>
>--
>Vern Graner CNE/CNA/SSE | "If the network is down, then you're
>Senior Systems Engineer | obviously incompetent so why are we
>Texas Information Services | paying you? Of course, if the network
>vern@t... www.txis.com | is up, then we obviously don't need
>Cell 507-7851 Desk 328-8947 | you, so why are we paying you?" VLG
>
>
>
>To UNSUBSCRIBE, just send mail to:
> basicstamps-unsubscribe@yahoogroups.com
>from the same email address that you subscribed. Text in the Subject and
>Body of the message will be ignored.
>
>
>Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>
>
>
>
>To UNSUBSCRIBE, just send mail to:
> basicstamps-unsubscribe@yahoogroups.com
>from the same email address that you subscribed. Text in the Subject and
>Body of the message will be ignored.
>
>
>Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
having equal amplitude across the whole frequency band of interest (usually
20 Hz to 20 kHz), while pink noise has equal energy per octave resulting in
a descending energy level as the frequency rises. Since human hearing (and
piano scales) hear in logarithmic scales, white noise will indeed sound very
harsh, while pink noise has much more bass since it's energy level decreases
as the frequency goes up. And yes, analog white noise sources can sound more
"real" than looped digital copies.
Also, white noise is called "white" for the same reason white light is
called "white". Both have (more or less) equal amounts of all colors
(frequencies) included. While pink noise is called "pink" since it's
"colored" and has more "bass" frequencies. I've heard of brown noise, but
not sure I want to know exactly what that is.
Mike Sokol
www.modernrecording.com
mikes@m...
Original Message
From: "Guy De Bievre" <guydb@t...>
To: <basicstamps@yahoogroups.com>
Sent: Wednesday, August 06, 2003 2:47 PM
Subject: Re: [noparse][[/noparse]basicstamps] Basic Stamp Alarm Clock Project- Control Audio
Levels?
> an OT remark...I guess you mean pink noise...it is what is being used in
> noise 'cancellators' or whatever they are called...white noise is harsher,
> rather unpleasant to listen to, pink noise is closer to surf sounds...I
> have been using it to block out tens of students practising simultaneously
> in the music across the street of a room where I do a lot of reading
> guy
>
> At 11:50 AM 8/6/2003 -0400, you wrote:
> >To ramp up or down sound you could use a Motorized POT! With a Simple
> >LM386 or similar the volume is controlled by a pot. Have the Stamp
> >control the pot.....
> >
> >For you white noise....why not record the Analog unit via your PC....then
> >burn a CD? Or use Software to generate White noise...and burn that to
CD....[noparse]:)[/noparse]
> >
> >Does the White Noise really help that much? My office uses it and I it
> >makes me wonder why the AC is so noisy!
> >
> >Good luck,
> >Tim
> >
> > >>> vern@t... 08/06/03 10:16AM >>>
> >Ok, I have a project I've been slowly advancing over time, and I thought
> >I would throw my two pondering points out to see if someone can give me a
> >shove in the right direction.
> >
> >Background: I have a Basic Stamp II with a Serial LCD module and the
> >Pocketwatch unit, all from Parallax. I have it configured as a basic
> >bedside alarm clock. Yeah, I know I could have gotten one for a lot less
> >$$$, but it was a fun project to learn about the stamp when I was
> >building a robot for my son (http://www.robocide.com) and when I finished
> >with the BSII I ended up needing more horsepower so I got a IIsx that
> >went into the robot so I had some spare parts and... but I digress... [noparse]:)[/noparse]
> >
> >Pondering Point 1: I have envisioned moving the "alarm clock" project
> >forward by having it control the volume of a radio/cd/mp3 player. The
> >idea would be to have the stamp slowly fade the sound in when the alarm
> >goes off rather than just closing a relay and blasting me out of bed, as
> >it does now. [noparse]:)[/noparse] I was toying with using the PWM out of the BSII to a cap
> >that then slowly bias a transistor or....?, but before I went down that
> >path, I wanted to see if anyone else has used a stamp to control an audio
> >volume source, and if so might they be willing to share a schematic to
> >keep me from re-inventing the wheel?
> >
> >For all I know there may be a One Wire or Scott Edwards widget called a
> >"Serial Sound Controller" that I could just put in line and be done! [noparse]:)[/noparse]
> >
> >Pondering Point 2: I like to sleep with "White Noise" playing in my room
> >to make my sleep more stable. (For those of you interested, white noise
> >like rain sounds or waterfalls raise the "noise floor" that your mind
> >uses as the threshold for what is loud enough to require your attention.
> >Makes it easier to sleep through the night in the event that your spouse
> >rises for the call of nature or the cat knocks over your son's large
> >Power Ranger Action Figure in the middle of the night!)
> >
> >Anyway, I have an old analog unit that makes very good white noise. I
> >wanted to have a 2nd unit to use when I traveled, so I bought one form
> >the Sharper Image company. Unfortunately, this unit uses a digital
> >generator that isn't as "random" as the analog unit I have and I can hear
> >"loop" points in the noise that are very distracting when trying to fall
> >asleep.
> >
> >So, since I would like to add some audio to my Basic Stamp Alarm Clock, I
> >thought about including a white noise generator in the new design as
> >another source for the stamp to control. For example, fade out the white
> >noise while fading in the music. So, has anyone used the stamp to create
> >white noise directly or does anyone have a circuit design that creates
> >"analog" white noise the stamp could subsequently control?
> >
> >Any feedback/questions/suggestions humbly received. TIA! [noparse]:)[/noparse]
> >
> >Vern
> >
> >--
> >Vern Graner CNE/CNA/SSE | "If the network is down, then you're
> >Senior Systems Engineer | obviously incompetent so why are we
> >Texas Information Services | paying you? Of course, if the network
> >vern@t... www.txis.com | is up, then we obviously don't need
> >Cell 507-7851 Desk 328-8947 | you, so why are we paying you?" VLG
> >
> >
> >
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> How about a digital pot ? Parallax uses them in one of the Stamps
> In Class curriculums.
I dug around on the site and didn't see the item you described. Do you
have a link to a schematic or a part numnber maybe? [noparse]:)[/noparse]
Vern
--
Vern Graner CNE/CNA/SSE | "If the network is down, then you're
Senior Systems Engineer | obviously incompetent so why are we
Texas Information Services | paying you? Of course, if the network
vern@t... www.txis.com | is up, then we obviously don't need
Cell 507-7851 Desk 328-8947 | you, so why are we paying you?" VLG
received here, and though I got some good responses (make an audio CD
w/noise & use motorized POTs) I'm still stuck on a couple of things:
1) Can the stamp *itself* be used to produce pink/white noise?
2) Can anyone provide (or point me to) a design/schematic for a stamp to
control audio volume in a non-mechanical manner? Al? Jon? [noparse]:D[/noparse]
TIA! [noparse]:)[/noparse]
Vern
--
Vern Graner CNE/CNA/SSE | "If the network is down, then you're
Senior Systems Engineer | obviously incompetent so why are we
Texas Information Services | paying you? Of course, if the network
vern@t... www.txis.com | is up, then we obviously don't need
Cell 507-7851 Desk 328-8947 | you, so why are we paying you?" VLG
Vernon Graner said:
> Tim:
>
> I like the idea of using the CD for the source of the white noise, the
> only problem is the length of time it takes for my CD to re-start itself
> when it repeats. There is a very significant intteruption that defeats
> the whole purpose of raising the noise floor. [noparse]:([/noparse] Looks like a circuit
> that creates noise is still the best bet since it would allow me to
> leverage a stamp-controlled volume system. I did find a schematic that
> looks interesting as a source for a white noise generator here:
>
> http://world.std.com/~reinhold/waynesrngcomp.gif
>
> Anyone care to comment on how well this would work and/or advise on how
> to build this with a single supply rather than a +/- supply? If thats too
> complicated, maybe something similar? I found some pseudo-generators as
> well, like this:
>
> http://www.qkits.com/serv/qkits/velleman/pages/k4301.asp
>
> The Vellman P4301 is sold by a few kit makers, but I'm afraid it will
> have discernible "loop points" as well. Ideally I'd like to find a
> circuit that would leverage the power of the stamp itself, but I don't
> know if such a circuit would make truly random noise w/o loop points...
>
> The idea about using motorized pots is cool! I hadn't thought about doing
> it that way. I found a few sources for motorized pots surplus in a quick
> search, but they're pretty pricey and I wonder if they'll operate
> silently? If the motor grinding is louder than the noise then the fade
> in/out is kinda blown. I'm still leaning to a solid-state solution... If
> I can find one.. [noparse]:)[/noparse]
>
> Vern
>
> --
> Vern Graner CNE/CNA/SSE | "If the network is down, then you're
> Senior Systems Engineer | obviously incompetent so why are we
> Texas Information Services | paying you? Of course, if the network
> vern@t... www.txis.com | is up, then we obviously don't need
> Cell 507-7851 Desk 328-8947 | you, so why are we paying you?" VLG
>
>
>
> Tim Hart said:
>> To ramp up or down sound you could use a Motorized POT! With a Simple
>> LM386 or similar the volume is controlled by a pot. Have the Stamp
>> control the pot.....
>>
>> For you white noise....why not record the Analog unit via your
>> PC....then
>> burn a CD? Or use Software to generate White noise...and burn that to
>> CD....[noparse]:)[/noparse]
>>
>> Does the White Noise really help that much? My office uses it and I it
>> makes me wonder why the AC is so noisy!
>>
>> Good luck,
>> Tim
>>
>>>>> vern@t... 08/06/03 10:16AM >>>
>> Ok, I have a project I've been slowly advancing over time, and I
>> thought
>> I would throw my two pondering points out to see if someone can give me
>> a
>> shove in the right direction.
>>
>> Background: I have a Basic Stamp II with a Serial LCD module and the
>> Pocketwatch unit, all from Parallax. I have it configured as a basic
>> bedside alarm clock. Yeah, I know I could have gotten one for a lot
>> less
>> $$$, but it was a fun project to learn about the stamp when I was
>> building a robot for my son (http://www.robocide.com) and when I
>> finished
>> with the BSII I ended up needing more horsepower so I got a IIsx that
>> went into the robot so I had some spare parts and... but I digress...
>> [noparse]:)[/noparse]
>>
>> Pondering Point 1: I have envisioned moving the "alarm clock" project
>> forward by having it control the volume of a radio/cd/mp3 player. The
>> idea would be to have the stamp slowly fade the sound in when the alarm
>> goes off rather than just closing a relay and blasting me out of bed,
>> as
>> it does now. [noparse]:)[/noparse] I was toying with using the PWM out of the BSII to a
>> cap
>> that then slowly bias a transistor or....?, but before I went down that
>> path, I wanted to see if anyone else has used a stamp to control an
>> audio
>> volume source, and if so might they be willing to share a schematic to
>> keep me from re-inventing the wheel?
>>
>> For all I know there may be a One Wire or Scott Edwards widget called a
>> "Serial Sound Controller" that I could just put in line and be done!
>> [noparse]:)[/noparse]
>>
>> Pondering Point 2: I like to sleep with "White Noise" playing in my
>> room
>> to make my sleep more stable. (For those of you interested, white noise
>> like rain sounds or waterfalls raise the "noise floor" that your mind
>> uses as the threshold for what is loud enough to require your
>> attention.
>> Makes it easier to sleep through the night in the event that your
>> spouse
>> rises for the call of nature or the cat knocks over your son's large
>> Power Ranger Action Figure in the middle of the night!)
>>
>> Anyway, I have an old analog unit that makes very good white noise. I
>> wanted to have a 2nd unit to use when I traveled, so I bought one form
>> the Sharper Image company. Unfortunately, this unit uses a digital
>> generator that isn't as "random" as the analog unit I have and I can
>> hear
>> "loop" points in the noise that are very distracting when trying to
>> fall
>> asleep.
>>
>> So, since I would like to add some audio to my Basic Stamp Alarm Clock,
>> I
>> thought about including a white noise generator in the new design as
>> another source for the stamp to control. For example, fade out the
>> white
>> noise while fading in the music. So, has anyone used the stamp to
>> create
>> white noise directly or does anyone have a circuit design that creates
>> "analog" white noise the stamp could subsequently control?
>>
>> Any feedback/questions/suggestions humbly received. TIA! [noparse]:)[/noparse]
>>
>> Vern
>>
>> --
>> Vern Graner CNE/CNA/SSE | "If the network is down, then you're
>> Senior Systems Engineer | obviously incompetent so why are we
>> Texas Information Services | paying you? Of course, if the network
>> vern@t... www.txis.com | is up, then we obviously don't need
>> Cell 507-7851 Desk 328-8947 | you, so why are we paying you?" VLG
>>
>>
>>
>> To UNSUBSCRIBE, just send mail to:
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>> and
>> Body of the message will be ignored.
>>
>>
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>> http://docs.yahoo.com/info/terms/
>>
>>
>>
>>
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>>
>>
>
>
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>
>
control in this months nuts n volts personaly i would
generate the noise externaly i have seen this done
with the juction of a transitor then amplifiy it with
a op amp looks like you could control it all with a
stamp good luck
--- Vernon Graner <vern@t...> wrote:
> Ok, so I've done a bit more research based on some
> of the feedback I've
> received here, and though I got some good responses
> (make an audio CD
> w/noise & use motorized POTs) I'm still stuck on a
> couple of things:
>
> 1) Can the stamp *itself* be used to produce
> pink/white noise?
>
> 2) Can anyone provide (or point me to) a
> design/schematic for a stamp to
> control audio volume in a non-mechanical manner? Al?
> Jon? [noparse]:D[/noparse]
>
> TIA! [noparse]:)[/noparse]
>
> Vern
>
> --
> Vern Graner CNE/CNA/SSE | "If the network is
> down, then you're
> Senior Systems Engineer | obviously incompetent
> so why are we
> Texas Information Services | paying you? Of course,
> if the network
> vern@t... www.txis.com | is up, then we
> obviously don't need
> Cell 507-7851 Desk 328-8947 | you, so why are we
> paying you?" VLG
>
>
> Vernon Graner said:
> > Tim:
> >
> > I like the idea of using the CD for the source of
> the white noise, the
> > only problem is the length of time it takes for my
> CD to re-start itself
> > when it repeats. There is a very significant
> intteruption that defeats
> > the whole purpose of raising the noise floor. [noparse]:([/noparse]
> Looks like a circuit
> > that creates noise is still the best bet since it
> would allow me to
> > leverage a stamp-controlled volume system. I did
> find a schematic that
> > looks interesting as a source for a white noise
> generator here:
> >
> > http://world.std.com/~reinhold/waynesrngcomp.gif
> >
> > Anyone care to comment on how well this would work
> and/or advise on how
> > to build this with a single supply rather than a
> +/- supply? If thats too
> > complicated, maybe something similar? I found some
> pseudo-generators as
> > well, like this:
> >
> >
>
http://www.qkits.com/serv/qkits/velleman/pages/k4301.asp
> >
> > The Vellman P4301 is sold by a few kit makers, but
> I'm afraid it will
> > have discernible "loop points" as well. Ideally
> I'd like to find a
> > circuit that would leverage the power of the stamp
> itself, but I don't
> > know if such a circuit would make truly random
> noise w/o loop points...
> >
> > The idea about using motorized pots is cool! I
> hadn't thought about doing
> > it that way. I found a few sources for motorized
> pots surplus in a quick
> > search, but they're pretty pricey and I wonder if
> they'll operate
> > silently? If the motor grinding is louder than the
> noise then the fade
> > in/out is kinda blown. I'm still leaning to a
> solid-state solution... If
> > I can find one.. [noparse]:)[/noparse]
> >
> > Vern
> >
> > --
> > Vern Graner CNE/CNA/SSE | "If the network is
> down, then you're
> > Senior Systems Engineer | obviously
> incompetent so why are we
> > Texas Information Services | paying you? Of
> course, if the network
> > vern@t... www.txis.com | is up, then we
> obviously don't need
> > Cell 507-7851 Desk 328-8947 | you, so why are we
> paying you?" VLG
> >
> >
> >
> > Tim Hart said:
> >> To ramp up or down sound you could use a
> Motorized POT! With a Simple
> >> LM386 or similar the volume is controlled by a
> pot. Have the Stamp
> >> control the pot.....
> >>
> >> For you white noise....why not record the Analog
> unit via your
> >> PC....then
> >> burn a CD? Or use Software to generate White
> noise...and burn that to
> >> CD....[noparse]:)[/noparse]
> >>
> >> Does the White Noise really help that much? My
> office uses it and I it
> >> makes me wonder why the AC is so noisy!
> >>
> >> Good luck,
> >> Tim
> >>
> >>>>> vern@t... 08/06/03 10:16AM >>>
> >> Ok, I have a project I've been slowly advancing
> over time, and I
> >> thought
> >> I would throw my two pondering points out to see
> if someone can give me
> >> a
> >> shove in the right direction.
> >>
> >> Background: I have a Basic Stamp II with a Serial
> LCD module and the
> >> Pocketwatch unit, all from Parallax. I have it
> configured as a basic
> >> bedside alarm clock. Yeah, I know I could have
> gotten one for a lot
> >> less
> >> $$$, but it was a fun project to learn about the
> stamp when I was
> >> building a robot for my son
> (http://www.robocide.com) and when I
> >> finished
> >> with the BSII I ended up needing more horsepower
> so I got a IIsx that
> >> went into the robot so I had some spare parts
> and... but I digress...
> >> [noparse]:)[/noparse]
> >>
> >> Pondering Point 1: I have envisioned moving the
> "alarm clock" project
> >> forward by having it control the volume of a
> radio/cd/mp3 player. The
> >> idea would be to have the stamp slowly fade the
> sound in when the alarm
> >> goes off rather than just closing a relay and
> blasting me out of bed,
> >> as
> >> it does now. [noparse]:)[/noparse] I was toying with using the PWM
> out of the BSII to a
> >> cap
> >> that then slowly bias a transistor or....?, but
> before I went down that
> >> path, I wanted to see if anyone else has used a
> stamp to control an
> >> audio
> >> volume source, and if so might they be willing to
> share a schematic to
> >> keep me from re-inventing the wheel?
> >>
> >> For all I know there may be a One Wire or Scott
> Edwards widget called a
> >> "Serial Sound Controller" that I could just put
> in line and be done!
> >> [noparse]:)[/noparse]
> >>
> >> Pondering Point 2: I like to sleep with "White
> Noise" playing in my
> >> room
> >> to make my sleep more stable. (For those of you
> interested, white noise
> >> like rain sounds or waterfalls raise the "noise
> floor" that your mind
> >> uses as the threshold for what is loud enough to
> require your
> >> attention.
> >> Makes it easier to sleep through the night in the
> event that your
> >> spouse
> >> rises for the call of nature or the cat knocks
> over your son's large
> >> Power Ranger Action Figure in the middle of the
> night!)
> >>
> >> Anyway, I have an old analog unit that makes very
> good white noise. I
> >> wanted to have a 2nd unit to use when I traveled,
> so I bought one form
> >> the Sharper Image company. Unfortunately, this
> unit uses a digital
> >> generator that isn't as "random" as the analog
> unit I have and I can
>
=== message truncated ===
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