Super Cap-not really...
Archiver
Posts: 46,084
> I agree 100%, especially if one is in another time zone.
> Regards
> > If somebody checks their email AFTER an answer has already
> been given,
> > what's the point of providing another answer?
>
Two more cents:
The example below is a good reason for providing another answer. The earlier
post suggested using an optical component with a diode and transistor in it,
which not too many people would have on hand. The later post used a diode
and a transistor that might be more commonly found in one's box of parts,
and probably costs less. Different ideas and perspectives really add value
to this forum technically, educationally, and interestingly.
I suppose on a dial-up line it might cost a penny or two per "extra" message
and that could be a bit irritating if you let it, but have you ever looked
into any other similar group lists?
Try the PIC list for example, where you can get 20 or 30 replies to the same
original posting one day, another 30 the next - and none of the 2,000+
participants ever complains.
This is a super forum and group of contributors that cover a broad range of
abilities, education, experience, and perspectives. I suggest welcoming and
valuing all of it.
CL
Arrived 23:14 EST:
Here are my 2 cents.
A simple y fool proof way is to use what is called a cross-over
detector.
Is simply a bipolar NPN like a 2N2222 and connect a clampping diode
base to emitter. Apply the AC signal to the base thru a resistor.
In the collector, a resistor to +5v.
Every time the sinewave goes thru zero, the collector saturates and
remains saturated thru the positive part of the cycle.
The diode clamps the junction to approximately 0.6 volts when the
sine wave goes negative.
There is no problems with resistor tolerances or changes in the
amplitude of the sine wave. The only changes are due to temperature
coefficient of the transistor Vbe which is approx. 2.2 mV/DegC
Arrived 21:51 EST:
--- In basicstamps@y..., "Chris Loiacono (E-mail)" <chris01@t...>
wrote:
> Not exactly, but in a similar way, it's fairly common to input a
sine wave
> to an opto-isolator with a transistor output that will always turn
on at the
> same angle (likewise off).
> Regards
> > If somebody checks their email AFTER an answer has already
> been given,
> > what's the point of providing another answer?
>
Two more cents:
The example below is a good reason for providing another answer. The earlier
post suggested using an optical component with a diode and transistor in it,
which not too many people would have on hand. The later post used a diode
and a transistor that might be more commonly found in one's box of parts,
and probably costs less. Different ideas and perspectives really add value
to this forum technically, educationally, and interestingly.
I suppose on a dial-up line it might cost a penny or two per "extra" message
and that could be a bit irritating if you let it, but have you ever looked
into any other similar group lists?
Try the PIC list for example, where you can get 20 or 30 replies to the same
original posting one day, another 30 the next - and none of the 2,000+
participants ever complains.
This is a super forum and group of contributors that cover a broad range of
abilities, education, experience, and perspectives. I suggest welcoming and
valuing all of it.
CL
Arrived 23:14 EST:
Here are my 2 cents.
A simple y fool proof way is to use what is called a cross-over
detector.
Is simply a bipolar NPN like a 2N2222 and connect a clampping diode
base to emitter. Apply the AC signal to the base thru a resistor.
In the collector, a resistor to +5v.
Every time the sinewave goes thru zero, the collector saturates and
remains saturated thru the positive part of the cycle.
The diode clamps the junction to approximately 0.6 volts when the
sine wave goes negative.
There is no problems with resistor tolerances or changes in the
amplitude of the sine wave. The only changes are due to temperature
coefficient of the transistor Vbe which is approx. 2.2 mV/DegC
Arrived 21:51 EST:
--- In basicstamps@y..., "Chris Loiacono (E-mail)" <chris01@t...>
wrote:
> Not exactly, but in a similar way, it's fairly common to input a
sine wave
> to an opto-isolator with a transistor output that will always turn
on at the
> same angle (likewise off).
Comments
To: <basicstamps@yahoogroups.com>
Sent: Thursday, December 27, 2001 5:53 AM
Subject: RE: [noparse][[/noparse]basicstamps] Re: Super Cap-not really...
> The example below is a good reason for providing another
answer. The earlier
> post suggested using an optical component with a diode and
transistor in it,
> which not too many people would have on hand. The later post
used a diode
> and a transistor that might be more commonly found in one's box
of parts,
> and probably costs less. Different ideas and perspectives
really add value
> to this forum technically, educationally, and interestingly.
I think multiple solutions to a problem or multiple part sources
are great. Reading through 8 messages that all say "You can get
it a Digikey" are not needed.
Tim
but what is the difference between a super cap and a capacitor ?
did "Super" come from the context of something else ?
richard
Original Message
From: "Cliff Griffin" <cliff@g...>
To: <basicstamps@yahoogroups.com>
Sent: Thursday, December 27, 2001 10:34 AM
Subject: Re: [noparse][[/noparse]basicstamps] Re: Super Cap-not really...
> Chris,
> Different answers aren't really addressed in that comment...had you read
my
> original post, later on I qualified the statement with the phrase
"identical
> answers." Different viewpoints and methods are always welcome. As for
those
> who are on the other side of the ball...keep lurking, and pitch in when
> necessary!
>
> Cliff
>
>
>
>
Original Message
> From: "Chris Loiacono (E-mail)" <chris01@t...>
> To: <basicstamps@yahoogroups.com>
> Sent: Thursday, December 27, 2001 3:53 AM
> Subject: RE: [noparse][[/noparse]basicstamps] Re: Super Cap-not really...
>
>
> > I agree 100%, especially if one is in another time zone.
> > Regards
>
> > > If somebody checks their email AFTER an answer has already
> > been given,
> > > what's the point of providing another answer?
> >
>
> Two more cents:
> The example below is a good reason for providing another answer. The
earlier
> post suggested using an optical component with a diode and transistor in
it,
> which not too many people would have on hand. The later post used a diode
> and a transistor that might be more commonly found in one's box of parts,
> and probably costs less. Different ideas and perspectives really add value
> to this forum technically, educationally, and interestingly.
>
> I suppose on a dial-up line it might cost a penny or two per "extra"
message
> and that could be a bit irritating if you let it, but have you ever looked
> into any other similar group lists?
> Try the PIC list for example, where you can get 20 or 30 replies to the
same
> original posting one day, another 30 the next - and none of the 2,000+
> participants ever complains.
> This is a super forum and group of contributors that cover a broad range
of
> abilities, education, experience, and perspectives. I suggest welcoming
and
> valuing all of it.
> CL
>
> Arrived 23:14 EST:
>
> Here are my 2 cents.
>
> A simple y fool proof way is to use what is called a cross-over
> detector.
> Is simply a bipolar NPN like a 2N2222 and connect a clampping diode
> base to emitter. Apply the AC signal to the base thru a resistor.
> In the collector, a resistor to +5v.
> Every time the sinewave goes thru zero, the collector saturates and
> remains saturated thru the positive part of the cycle.
> The diode clamps the junction to approximately 0.6 volts when the
> sine wave goes negative.
> There is no problems with resistor tolerances or changes in the
> amplitude of the sine wave. The only changes are due to temperature
> coefficient of the transistor Vbe which is approx. 2.2 mV/DegC
>
>
> Arrived 21:51 EST:
>
> --- In basicstamps@y..., "Chris Loiacono (E-mail)" <chris01@t...>
> wrote:
> > Not exactly, but in a similar way, it's fairly common to input a
> sine wave
> > to an opto-isolator with a transistor output that will always turn
> on at the
> > same angle (likewise off).
>
>
> 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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>
>
>
>
> To UNSUBSCRIBE, just send mail to:
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> from the same email address that you subscribed. Text in the Subject and
Body of the message will be ignored.
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>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>
>
Different answers aren't really addressed in that comment...had you read my
original post, later on I qualified the statement with the phrase "identical
answers." Different viewpoints and methods are always welcome. As for those
who are on the other side of the ball...keep lurking, and pitch in when
necessary!
Cliff
Original Message
From: "Chris Loiacono (E-mail)" <chris01@t...>
To: <basicstamps@yahoogroups.com>
Sent: Thursday, December 27, 2001 3:53 AM
Subject: RE: [noparse][[/noparse]basicstamps] Re: Super Cap-not really...
> I agree 100%, especially if one is in another time zone.
> Regards
> > If somebody checks their email AFTER an answer has already
> been given,
> > what's the point of providing another answer?
>
Two more cents:
The example below is a good reason for providing another answer. The earlier
post suggested using an optical component with a diode and transistor in it,
which not too many people would have on hand. The later post used a diode
and a transistor that might be more commonly found in one's box of parts,
and probably costs less. Different ideas and perspectives really add value
to this forum technically, educationally, and interestingly.
I suppose on a dial-up line it might cost a penny or two per "extra" message
and that could be a bit irritating if you let it, but have you ever looked
into any other similar group lists?
Try the PIC list for example, where you can get 20 or 30 replies to the same
original posting one day, another 30 the next - and none of the 2,000+
participants ever complains.
This is a super forum and group of contributors that cover a broad range of
abilities, education, experience, and perspectives. I suggest welcoming and
valuing all of it.
CL
Arrived 23:14 EST:
Here are my 2 cents.
A simple y fool proof way is to use what is called a cross-over
detector.
Is simply a bipolar NPN like a 2N2222 and connect a clampping diode
base to emitter. Apply the AC signal to the base thru a resistor.
In the collector, a resistor to +5v.
Every time the sinewave goes thru zero, the collector saturates and
remains saturated thru the positive part of the cycle.
The diode clamps the junction to approximately 0.6 volts when the
sine wave goes negative.
There is no problems with resistor tolerances or changes in the
amplitude of the sine wave. The only changes are due to temperature
coefficient of the transistor Vbe which is approx. 2.2 mV/DegC
Arrived 21:51 EST:
--- In basicstamps@y..., "Chris Loiacono (E-mail)" <chris01@t...>
wrote:
> Not exactly, but in a similar way, it's fairly common to input a
sine wave
> to an opto-isolator with a transistor output that will always turn
on at the
> same angle (likewise off).
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/
Some are used as filters (bypass), some as storage devices.
normaly are specified in pF (picoFarads, or 10^-12), nF (nanoFarads,
10^-9), uF (microFarads, or 10^-6)
The most capacitance are found in the Electrolytic type were
capacitance is measured in uF or microFarads (10^-6 Farads).
Depending in the working voltage the low the voltage, the higher the
capacitance.
The Super caps are normally specified in Farads, they are rated
normally at 5V, they use a special electrolyte that makes specially
useful in maintaining alive electronics circuits for long periods of
time. Unfortunately they can only provide very small amount of
current.
--- In basicstamps@y..., "Richard Friedrich" <rfriedrich@a...> wrote:
> I kinda been following this thread . . . and maybe missed some of
it
>
> but what is the difference between a super cap and a capacitor ?
>
> did "Super" come from the context of something else ?
>
>
> richard
>
>
>
>
Original Message
> From: "Cliff Griffin" <cliff@g...>
> To: <basicstamps@y...>
> Sent: Thursday, December 27, 2001 10:34 AM
> Subject: Re: [noparse][[/noparse]basicstamps] Re: Super Cap-not really...
>
>
> > Chris,
> > Different answers aren't really addressed in that comment...had
you read
> my
> > original post, later on I qualified the statement with the phrase
> "identical
> > answers." Different viewpoints and methods are always welcome. As
for
> those
> > who are on the other side of the ball...keep lurking, and pitch
in when
> > necessary!
> >
> > Cliff
> >
> >
> >
> >
Original Message
> > From: "Chris Loiacono (E-mail)" <chris01@t...>
> > To: <basicstamps@y...>
> > Sent: Thursday, December 27, 2001 3:53 AM
> > Subject: RE: [noparse][[/noparse]basicstamps] Re: Super Cap-not really...
> >
> >
> > > I agree 100%, especially if one is in another time zone.
> > > Regards
> >
> > > > If somebody checks their email AFTER an answer has already
> > > been given,
> > > > what's the point of providing another answer?
> > >
> >
> > Two more cents:
> > The example below is a good reason for providing another answer.
The
> earlier
> > post suggested using an optical component with a diode and
transistor in
> it,
> > which not too many people would have on hand. The later post
used a diode
> > and a transistor that might be more commonly found in one's box
of parts,
> > and probably costs less. Different ideas and perspectives really
add value
> > to this forum technically, educationally, and interestingly.
> >
> > I suppose on a dial-up line it might cost a penny or two
per "extra"
> message
> > and that could be a bit irritating if you let it, but have you
ever looked
> > into any other similar group lists?
> > Try the PIC list for example, where you can get 20 or 30 replies
to the
> same
> > original posting one day, another 30 the next - and none of the
2,000+
> > participants ever complains.
> > This is a super forum and group of contributors that cover a
broad range
> of
> > abilities, education, experience, and perspectives. I suggest
welcoming
> and
> > valuing all of it.
> > CL
> >
> > Arrived 23:14 EST:
> >
> > Here are my 2 cents.
> >
> > A simple y fool proof way is to use what is called a cross-over
> > detector.
> > Is simply a bipolar NPN like a 2N2222 and connect a clampping
diode
> > base to emitter. Apply the AC signal to the base thru a resistor.
> > In the collector, a resistor to +5v.
> > Every time the sinewave goes thru zero, the collector saturates
and
> > remains saturated thru the positive part of the cycle.
> > The diode clamps the junction to approximately 0.6 volts when the
> > sine wave goes negative.
> > There is no problems with resistor tolerances or changes in the
> > amplitude of the sine wave. The only changes are due to
temperature
> > coefficient of the transistor Vbe which is approx. 2.2 mV/DegC
> >
> >
> > Arrived 21:51 EST:
> >
> > --- In basicstamps@y..., "Chris Loiacono (E-mail)" <chris01@t...>
> > wrote:
> > > Not exactly, but in a similar way, it's fairly common to input a
> > sine wave
> > > to an opto-isolator with a transistor output that will always
turn
> > on at the
> > > same angle (likewise off).
> >
> >
> > To UNSUBSCRIBE, just send mail to:
> > basicstamps-unsubscribe@y...
> > 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@y...
> > 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/
> >
> >
work, its hard to see the first reply 50 or 60 messages down from the
original question.
Original Message
> > I agree 100%, especially if one is in another time zone.
> > > If somebody checks their email AFTER an answer has already
> > been given,
> > > what's the point of providing another answer?
> The example below is a good reason for providing another answer. The
earlier
> post suggested using an optical component with a diode and transistor in
it,
> which not too many people would have on hand. The later post used a diode
> and a transistor that might be more commonly found in one's box of parts,
> and probably costs less. Different ideas and perspectives really add value
> to this forum technically, educationally, and interestingly.
>
> I suppose on a dial-up line it might cost a penny or two per "extra"
message
> and that could be a bit irritating if you let it, but have you ever looked
> into any other similar group lists?
> Try the PIC list for example, where you can get 20 or 30 replies to the
same
> original posting one day, another 30 the next - and none of the 2,000+
> participants ever complains.
> This is a super forum and group of contributors that cover a broad range
of
> abilities, education, experience, and perspectives. I suggest welcoming
and
> valuing all of it.
capacitor.
For instance, many power supplies use a 3300 Mfd filter cap, which is pretty
large as capacitors go. If I remember my math, thats 0.0033 Farads. A
supercap may be as large as 1 Farad, 303 times the capacitance of the filter
capacitor.
Normal capacitors are for filtering, blocking or passing signals, but a
supercap is like a low current rechargeable battery. They use it alot for
clock chips and backup memory.
Original Message
> I kinda been following this thread . . . and maybe missed some of it
>
> but what is the difference between a super cap and a capacitor ?
>
> did "Super" come from the context of something else ?
all before you respond! Afterall, if you hit all of the topics right from
the start, then the next guy who works even later will have to sort through
110+ messages!
What I do when my Inbox is full is hit reply to the first one that I want to
join in on...BUT...I don't type anything until I see what else has been
going on in the thread. I let the Reply just sit in the background waiting
for me.
Cliff
Original Message
From: "Rodent" <daweasel@s...>
To: <basicstamps@yahoogroups.com>
Sent: Thursday, December 27, 2001 2:33 PM
Subject: Re: [noparse][[/noparse]basicstamps] Re: Super Cap-not really...
For some of us that get 100+ emails per day and don't read it until after
work, its hard to see the first reply 50 or 60 messages down from the
original question.
Original Message
> > I agree 100%, especially if one is in another time zone.
> > > If somebody checks their email AFTER an answer has already
> > been given,
> > > what's the point of providing another answer?
> The example below is a good reason for providing another answer. The
earlier
> post suggested using an optical component with a diode and transistor in
it,
> which not too many people would have on hand. The later post used a diode
> and a transistor that might be more commonly found in one's box of parts,
> and probably costs less. Different ideas and perspectives really add value
> to this forum technically, educationally, and interestingly.
>
> I suppose on a dial-up line it might cost a penny or two per "extra"
message
> and that could be a bit irritating if you let it, but have you ever looked
> into any other similar group lists?
> Try the PIC list for example, where you can get 20 or 30 replies to the
same
> original posting one day, another 30 the next - and none of the 2,000+
> participants ever complains.
> This is a super forum and group of contributors that cover a broad range
of
> abilities, education, experience, and perspectives. I suggest welcoming
and
> valuing all of it.
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/
myself. Why should I go through all the hassle to keep track of the messages
and replies just because its easier on someone else. You guys act like you
have a 300 baud connection and read at a 3rd grade level.
Original Message
From: "Cliff Griffin" <cliff@g...>
To: <basicstamps@yahoogroups.com>
Sent: Thursday, December 27, 2001 8:33 PM
Subject: Re: [noparse][[/noparse]basicstamps] Re: Super Cap-not really...
> That's the very reason you should consider waiting until you've read them
> all before you respond! Afterall, if you hit all of the topics right from
> the start, then the next guy who works even later will have to sort
through
> 110+ messages!
>
> What I do when my Inbox is full is hit reply to the first one that I want
to
> join in on...BUT...I don't type anything until I see what else has been
> going on in the thread. I let the Reply just sit in the background waiting
> for me.
>
> Cliff
>
>
>
Original Message
> From: "Rodent" <daweasel@s...>
> To: <basicstamps@yahoogroups.com>
> Sent: Thursday, December 27, 2001 2:33 PM
> Subject: Re: [noparse][[/noparse]basicstamps] Re: Super Cap-not really...
>
>
> For some of us that get 100+ emails per day and don't read it until after
> work, its hard to see the first reply 50 or 60 messages down from the
> original question.
>
>
Original Message
>
> > > I agree 100%, especially if one is in another time zone.
>
> > > > If somebody checks their email AFTER an answer has already
> > > been given,
> > > > what's the point of providing another answer?
>
> > The example below is a good reason for providing another answer. The
> earlier
> > post suggested using an optical component with a diode and transistor in
> it,
> > which not too many people would have on hand. The later post used a
diode
> > and a transistor that might be more commonly found in one's box of
parts,
> > and probably costs less. Different ideas and perspectives really add
value
> > to this forum technically, educationally, and interestingly.
> >
> > I suppose on a dial-up line it might cost a penny or two per "extra"
> message
> > and that could be a bit irritating if you let it, but have you ever
looked
> > into any other similar group lists?
> > Try the PIC list for example, where you can get 20 or 30 replies to the
> same
> > original posting one day, another 30 the next - and none of the 2,000+
> > participants ever complains.
> > This is a super forum and group of contributors that cover a broad range
> of
> > abilities, education, experience, and perspectives. I suggest welcoming
> and
> > valuing all of it.
>
>
>
>
> 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/
>
>
'Ultracapacitors'. Thought it might be of interest to you guys looking for
answers on Supercapacitors. I don't know if they have anything to do with
each other. Oh yea-- <http://www.poptronics.com> is the URL for the
magazine.
Henry
Original Message
From: "Rodent" <daweasel@s...>
To: <basicstamps@yahoogroups.com>
Sent: 27 December, 2001 2:33 PM
Subject: Re: [noparse][[/noparse]basicstamps] Re: Super Cap-not really...
> For some of us that get 100+ emails per day and don't read it until after
> work, its hard to see the first reply 50 or 60 messages down from the
> original question.
>
>
Original Message
>
> > > I agree 100%, especially if one is in another time zone.
>
> > > > If somebody checks their email AFTER an answer has already
> > > been given,
> > > > what's the point of providing another answer?
>
> > The example below is a good reason for providing another answer. The
> earlier
> > post suggested using an optical component with a diode and transistor in
> it,
> > which not too many people would have on hand. The later post used a
diode
> > and a transistor that might be more commonly found in one's box of
parts,
> > and probably costs less. Different ideas and perspectives really add
value
> > to this forum technically, educationally, and interestingly.
> >
> > I suppose on a dial-up line it might cost a penny or two per "extra"
> message
> > and that could be a bit irritating if you let it, but have you ever
looked
> > into any other similar group lists?
> > Try the PIC list for example, where you can get 20 or 30 replies to the
> same
> > original posting one day, another 30 the next - and none of the 2,000+
> > participants ever complains.
> > This is a super forum and group of contributors that cover a broad range
> of
> > abilities, education, experience, and perspectives. I suggest welcoming
> and
> > valuing all of it.
>
>
>
>
> 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/
>
>
>
>Finally, someone got it right !!!!!! Thanks Rodent.
>Henry
>
Original Message
>From: "Rodent" <daweasel@s...>
>To: <basicstamps@yahoogroups.com>
>Sent: 27 December, 2001 2:33 PM
>Subject: Re: [noparse][[/noparse]basicstamps] Re: Super Cap-not really...
>
>
> > For some of us that get 100+ emails per day and don't read it until after
> > work, its hard to see the first reply 50 or 60 messages down from the
> > original question.
Forgive a dumb question, but won't Outlook Express thread by subject?
Jim H