Electronics Forum / Electronics / January 2007

Hello, I'm trying to hook up a 74HCT163 to count from 0 to 7 then loop
and keep doing it.  I'm having a lot of trouble making sense of the
data sheet on how to connect this thing.  I have a 555 chip creating my
clock, it's lighting an LED right now, I took that from the positive

I'm considering adding temperature regulation to a 12V portable fridge.
The circuitry doesn't appear to be much more than a hot/cold switch
which switches polarity to a peltier device. Will switching the device
on and off with a certain "minimum" period (to avoid rapid cycling) be

Gudday
Can someone tell me, if I have a PIC running at 20 MHz and do this:-
high pin
nop

sorry if it is off-topic for this group,
but I am urgently looking for the service manual for this device.
Any help is wellcome.
Please email me.

Hi all and a very Happy New Year ;)
This is my first post & look forward to learning & helping when I can.
I need a TOP243Y or TOP244Y switching regulator IC for a Switch Mode
Power

I just got a new DVD player and I noticed that when playing a CD-R data
file (AVI) it makes a clicking or chirping noise every second. Regular
DVDs play fine, I have no DVD-Rs to try, and I haven't had a chance to
try another CD-R. However, I've read reviews where other people had ...

The vacuum cleaner motor makes just as much noise without the fan
attached to the shaft. It's the cheap motor that makes all the noise. If
they put a geared up induction motor in there it would be a lot quieter.
Why don't they do that?