| Thread | Last Post | Replies |
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| why sine waves in power lines and why not square wave! | 01 May 2007 00:52 GMT | 12 |
Why are we using sine wave A.C in power transmission lines? Why
shouldn't we use Square wave AC instead of Sine?
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| Switching V-reg | 30 Apr 2007 15:12 GMT | 3 |
I need to find a v-reg that turns 12 volts to 3.3volts and one that
turns 12 volts to 5volts. Does anyone know any good ICs for this.
Joe McKibben
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| At what frequencies does a ground plane become important?? | 30 Apr 2007 08:43 GMT | 7 |
Would a 555 square wave oscillator running at 30Khz work any better
with or without a ground plane? I need the harmonics unhindered.
|
| Using a relay | 30 Apr 2007 06:28 GMT | 12 |
I got a relay I cant figure out how to use, it as 5 connectors.
Its a finder 36.11.9.005.0000 5V(dc) 10A 250V(ac), I dont have a
datasheet for it.
The legs are like this
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| Cursed | 30 Apr 2007 01:37 GMT | 26 |
A princess walked into Radio Shack holding a frog. And she said to
the sales person,
"can you help me with this, my prince got turned into a frog"?
So the salesperson sold her a TTL 7404.
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| 2pole Rotary Switch and Diodes HELP | 29 Apr 2007 23:42 GMT | 8 |
Original Question
Can anyone recommend a rotary switch, transistors, Ic's, or any
component that may work for following situation?
I have a circuit 4.5 vdc and three momentary switches in series (two
|
| B&K 2635 Newly UKAS Calibrated VGC. F/S | 29 Apr 2007 20:28 GMT | 1 |
Only 2 hours left..£109 current price....I am selling my newly
callibrated B&K 2635 no reserve, Ebay uk
300103292550.
regards Alan
|
| Simple circuit to measure baud rate on a serial link | 29 Apr 2007 04:01 GMT | 8 |
I'd like to be able to measure the baud rate that a couple of sealed devices
are using to talk to each other over a serial (RS232) cable. I know that
they only use the common baud rates 9600, 19200, etc.
Can anybody give me some pointers on a circuit I could build that I could
|
| Help - I need a design for a 6 volt, 700 mAmp dc power supply | 29 Apr 2007 02:18 GMT | 4 |
I want to build a sturdy, portable dc power supply to plug into my MP3
player that has issues with charging its internal battery. It works
just fine with the AC/DC adapter but want my player to be "portable"
again.
|
| Gain bandwidth product | 29 Apr 2007 01:49 GMT | 7 |
I have been reading in wikipedia about Gain-bandwidth product
and I wanted to ask if anyone knows why the openloop
gain decreases linearly as the frequency increases?
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| Soldering tiny (e.g. PLCC, LFCSP, CLCC) ICs | 28 Apr 2007 22:19 GMT | 9 |
What do hobbyists do if the IC they want is only available in a tiny
5mm-on-a-side format, like CLCC? (I'm thinking, specifically, of an
accelerometer made by Analog Devices.) Are there snap-in adapters out
there that would give me a more PDIP-like pin-out? I have seen
|
| building a digital optical protractor | 28 Apr 2007 11:17 GMT | 9 |
i am needing to measure the angle of an arm. I would like the readout
to be very accurate to .001 degrees. Has this been done. I thought
of measuring the optical pulses through a digital encoder like used in
a digital mouse. thanks in advance for the help.
|
| feesible idea for soldering ic's? | 28 Apr 2007 07:52 GMT | 21 |
Teds post gave me an idea to solder in smt ic's using an idea similar to
welding. Would it be possible to use a low voltage high current source to
melt pre-tinned pads to the ic?
The idea might be something like sticking a conductive bar over the pins of
|
| Why the common emmiter | 28 Apr 2007 00:13 GMT | 36 |
hello every body, i have a quistion. Why do we use the common emmiter ?
|
| LM386 (audio amp) oscillates | 27 Apr 2007 20:20 GMT | 13 |
I have a LM386 that oscillates when the volume is turned up too far.
It's operating with the default gain of 20 and there is a RC on the
output as recommended in the app notes (10 ohms in series with .05uF).
The oscillations will stop if I add a .05 cap across the input pot,
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