pressure sensor fun!
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Posts: 46,084
I need code and circuit diagrams/descriptions for a device. To start, the
device will be triggered by a heat sensor(turns on BS2), for one miniute(timer
circuit?) unless a pressure sensor circuit has activity. I will have a pressure
sensor circuit for reading "inhale" pressure. The pressure sensor circuit will
trigger a varying intensity LED and also trigger a varying voltage output to
trigger another component.
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device will be triggered by a heat sensor(turns on BS2), for one miniute(timer
circuit?) unless a pressure sensor circuit has activity. I will have a pressure
sensor circuit for reading "inhale" pressure. The pressure sensor circuit will
trigger a varying intensity LED and also trigger a varying voltage output to
trigger another component.
Do you Yahoo!?
The New Yahoo! Shopping - with improved product search
[noparse][[/noparse]Non-text portions of this message have been removed]
Comments
If the Stamp is to be off until the heat sensor is activated, you will need
a circuit to do that job. There is no way for the Stamp to run the sensor
when it is off. You could make a device to do so with a comparator/op-amp.
The Stamp doesn't have a really accurate timer, but if the length of
operation is critical, counting program loops should do.
As to the rest, it's too vague to help. What pressure sensor, what "other
component" gets a varying voltage etc.?
Jonathan
www.madlabs.info
Original Message
From: "frak jak" <frak_jak@y...>
To: <basicstamps@yahoogroups.com>
Sent: Friday, October 10, 2003 11:12 PM
Subject: [noparse][[/noparse]basicstamps] pressure sensor fun!
> I need code and circuit diagrams/descriptions for a device. To start,
the device will be triggered by a heat sensor(turns on BS2), for one
miniute(timer circuit?) unless a pressure sensor circuit has activity. I
will have a pressure sensor circuit for reading "inhale" pressure. The
pressure sensor circuit will trigger a varying intensity LED and also
trigger a varying voltage output to trigger another component.
>
>
>
> Do you Yahoo!?
> The New Yahoo! Shopping - with improved product search
>
> [noparse][[/noparse]Non-text portions of this message have been removed]
>
>
> To UNSUBSCRIBE, just send mail to:
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Body of the message will be ignored.
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>
help if you show some effort on you part to try. Asking for completed code and
schematic is a bit much imho.
For a turn key application "I need code and circuit diagrams/descriptions for
a device." that will usually cost you $$.
For starters, have you purchased the BS2 and do you have the latest free
manual or tutorials that can be downloaded from the Parallax websight?
Have you selected a heat sensor?
Also, do you have the pressure sensor?
What kind of power supply / battery will operate the entire system?
Assuming that the heat sensor is a thermister (a component whose resistance
varies with temperature) you will need to do some investigative testing. If
your system is 12 volts, you could connect the thermister to +12 volts, and
another resistor to ground. At the junction of the thermister and fixed
resistor,
the voltage will vary with temperature.
This ananlog voltage could then be fed into a comparitor that can be
configured for the output to be logic 1 or logic 0 depending on the temperature
you
want to trigger from.
The pressure sensor, assuming its output is an analog voltage could aslo be
fed to an op amp comparitor with the output logic 1 or 0 based on the pressure
or no pressure.
The outputs of the thermosensor comparitor and pressure sensor comparitor
could be fed into simple logic gates (NAND) to trigger power to the BS2 for one
minute.
Show some effort on your side and you will be amazed with the responces.
Ken
In a message dated 10/10/2003 11:14:16 PM Pacific Daylight Time,
frak_jak@y... writes:
I need code and circuit diagrams/descriptions for a device. To start, the
device will be triggered by a heat sensor(turns on BS2), for one miniute(timer
circuit?) unless a pressure sensor circuit has activity. I will have a
pressure sensor circuit for reading "inhale" pressure. The pressure sensor
circuit
will trigger a varying intensity LED and also trigger a varying voltage
output to trigger another component.
[noparse][[/noparse]Non-text portions of this message have been removed]
Thanks for your response.
My details were vague because earlier postings to the BS group were not getting
any response. My BS2 was fried recently (I’m in the process of getting a new
one) and I’m in transition between computers, so my responses will be slow.
I’m beginning research of your comparator/op-amp idea via some parallax
tutorials & manuals I downloaded from parallax in the past and via other emails
from the BS group. The length of operation isn’t critical, so is the “counting
program loops” the best idea for the timer portion of my project or is there a
simpler way(I’m going to play with this option when I get my BS2 setup, up and
running again) ?
The pressure sensor will be a motorola 5000 series or a similar but cheaper
generic version, but i’m still not sure of the specs my project will require(psi
rating, etc...).
The “other components” I do not wish to discuss until later, as my patenting
efforts may be compromised.
frak_jak@y...
Jonathan Peakall <jpeakall@m...> wrote:
Frak,
If the Stamp is to be off until the heat sensor is activated, you will need
a circuit to do that job. There is no way for the Stamp to run the sensor
when it is off. You could make a device to do so with a comparator/op-amp.
The Stamp doesn't have a really accurate timer, but if the length of
operation is critical, counting program loops should do.
As to the rest, it's too vague to help. What pressure sensor, what "other
component" gets a varying voltage etc.?
Jonathan
www.madlabs.info
Original Message
From: "frak jak"
To:
Sent: Friday, October 10, 2003 11:12 PM
Subject: [noparse][[/noparse]basicstamps] pressure sensor fun!
> I need code and circuit diagrams/descriptions for a device. To start,
the device will be triggered by a heat sensor(turns on BS2), for one
miniute(timer circuit?) unless a pressure sensor circuit has activity. I
will have a pressure sensor circuit for reading "inhale" pressure. The
pressure sensor circuit will trigger a varying intensity LED and also
trigger a varying voltage output to trigger another component.
>
>
>
> Do you Yahoo!?
> The New Yahoo! Shopping - with improved product search
>
> [noparse][[/noparse]Non-text portions of this message have been removed]
>
>
> 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.
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Do you Yahoo!?
The New Yahoo! Shopping - with improved product search
[noparse][[/noparse]Non-text portions of this message have been removed]
Get back to us when you can, and we'll help all we can. Counting loops
sounds like the way to go for your application. We don't need to know what
the devices does, but we do need to know the specs of all the components
involved to be of much help.
Jonathan
Original Message
From: "frak jak" <frak_jak@y...>
To: <basicstamps@yahoogroups.com>
Sent: Saturday, November 01, 2003 12:22 PM
Subject: Re: [noparse][[/noparse]basicstamps] pressure sensor fun!
> jpeakall@m...
>
> Thanks for your response.
>
> My details were vague because earlier postings to the BS group were not
getting any response. My BS2 was fried recently (I'm in the process of
getting a new one) and I'm in transition between computers, so my responses
will be slow.
>
> I'm beginning research of your comparator/op-amp idea via some parallax
tutorials & manuals I downloaded from parallax in the past and via other
emails from the BS group. The length of operation isn't critical, so is the
"counting program loops" the best idea for the timer portion of my project
or is there a simpler way(I'm going to play with this option when I get my
BS2 setup, up and running again) ?
>
> The pressure sensor will be a motorola 5000 series or a similar but
cheaper generic version, but i'm still not sure of the specs my project will
require(psi rating, etc...).
> The "other components" I do not wish to discuss until later, as my
patenting efforts may be compromised.
>
> frak_jak@y...
>
>
>
> Jonathan Peakall <jpeakall@m...> wrote:
> Frak,
>
> If the Stamp is to be off until the heat sensor is activated, you will
need
> a circuit to do that job. There is no way for the Stamp to run the sensor
> when it is off. You could make a device to do so with a comparator/op-amp.
> The Stamp doesn't have a really accurate timer, but if the length of
> operation is critical, counting program loops should do.
>
> As to the rest, it's too vague to help. What pressure sensor, what "other
> component" gets a varying voltage etc.?
>
> Jonathan
>
> www.madlabs.info
>
>
Original Message
> From: "frak jak"
> To:
> Sent: Friday, October 10, 2003 11:12 PM
> Subject: [noparse][[/noparse]basicstamps] pressure sensor fun!
>
>
> > I need code and circuit diagrams/descriptions for a device. To start,
> the device will be triggered by a heat sensor(turns on BS2), for one
> miniute(timer circuit?) unless a pressure sensor circuit has activity. I
> will have a pressure sensor circuit for reading "inhale" pressure. The
> pressure sensor circuit will trigger a varying intensity LED and also
> trigger a varying voltage output to trigger another component.
> >
> >
> >
> > Do you Yahoo!?
> > The New Yahoo! Shopping - with improved product search
> >
> > [noparse][[/noparse]Non-text portions of this message have been removed]
> >
> >
> > 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/
>
>
>
>
> Do you Yahoo!?
> The New Yahoo! Shopping - with improved product search
>
> [noparse][[/noparse]Non-text portions of this message have been removed]
>
>
> 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/
>
>
>
>