Magnetic Earphones - Series Or Parallel? [2 articles]
Dave.H - 11:17 03-05-08
I am thinking of building a set of earphones for my regen radio, as an
alternative to my extremely uncomfortable antique magnetic earphones.
I found some cheap earphones at Antiq... Read More
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ultrasonic mister [5 articles]
10:09 03-05-08
I am wondering if it is possible to operate a 24vdc mister on 12vdc?
Something simalar to this:
Item: MDC01; DC powered mist maker
Transformer Input: AC110V; Output: DC24V
... Read More
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Garage door alert [19 articles]
Ed - 11:08 02-05-08
I'm in need of a garage door alert so there is a small red light in
the house indicating it's open.
I bought one made by LiftMaster, but it's not quite right for my
situation.... Read More
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AC signal across 12V (DC) halogen bulbs? [2 articles]
allanlewis - 19:48 01-05-08
Hi,
I have a lighting controller circuit using an H-bridge, which produces
a 250Hz signal across a pair of 12V halogen bulbs. (The duty cycle is
controller by a microcontrolle... Read More
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Need to generate sequence 001, 010, 100, 001, 010, 100, ... [20 articles]
jalbers@bsu.edu - 17:42 30-04-08
I am looking for the simplest collection of logic chips that would
produce the sequence 001, 010, 100, 001, 010, 100, ...
I know that a PIC could be programemd to do this.
A... Read More
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Quarternary Logic [2 articles]
Robotnik - 11:34 30-04-08
Hey guys,
I was thinking of a new concept whereby we could
square the amount of information stored in a bit. Currently, the
information stored in a bit is whethe... Read More
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Chip finder? [7 articles]
Sky King - 15:00 29-04-08
Is there a web site that will cross reference chip numbers? I have
some older designs I would like to build, but the chips they list are
no longer made. Any help will be helpfu... Read More
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dialer chip NTE1691 [6 articles]
lerameur - 14:45 29-04-08
Hello,
I would like to use a dialer chip the NTE1691. Can some tell me how to
use the RC pin, There a three pins used ar reference frequency, The
datasheet does not say how to... Read More
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"Goosing" with a higher voltage [8 articles]
eromlignod - 09:58 29-04-08
Hi guys:
I have an application where I'm driving a device with 5 volts DC.
From time to time it is necessary to give it a short pulse of 24 Vdc
then revert back to 5V.
I ha... Read More
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Blue ray [7 articles]
Chirutha - 22:56 28-04-08
Hai!
Kindly forward me anything about blue ray please.
... Read More
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