Electronics Forum / Electronics / May 2007

I'm from Denmark and are trying to repair a old Russian oscilloscope. I'm
pretty sure I have found the error, but I can't identify the component's
value. I'm 99.99% sure it's a capacitor - the three lines of text on it
says:

I have just bought a cheap camcorder which I find allows me to transfer
recordings directly from tape to my DVD recorder, via Firewire. In the
process, the recorder can automatically switch the camera on/off.
Can anyone tell me if it might be possible to build a simple switch to

Radar Detector Multi-Band
http://ejayz.websitewizard.com/ModShop/ShowProduct/40590/

Just wondering if anyone can help here.
Just had a new house built and we are getting a problem with the
lights flickering. The builder's electricians have changed the circuit
breakers, changed the RCD protecting the lights and have swapped the

Microsoft's table top pc or Milan will suck in my opinion. I hate touch
screens. I hate them as much as buttonless keyboards or pictures of
buttons. I don't like pressing something that don't press. I want to
feel the key move and click. I don't like looking at the display all the

New to the group, but a quick google didn't turn up anything
appropriate.
I'm looking for info about mods to cheap weather station devices to
allow hooking them up to a computer for data logging purposes.

I'd like to make a 555 PWM speed controller to drive
a mosfet and switch a 240V DC motor that normally runs off
a TRIAC circuit fed into a bridge rectifier. The TRIAC
controller normally is set up to output 240V max from the

Disclaimer #1 - I can assemble a simple circuit from a schematic but
that is about my limit as far as skill and knowledge goes.
I've been looking at battery desulfation, and it seems to boil down to
sticking a high energy pulse of about 4 times nominal voltage (so

I want to hook the audio output from my computer to my stereo.  It's
about a 30 foot run.  Do I need to use shielded wiring for a run this
long?  I don't know much about this kind of setup so any advice would
be appreciated.

I caught the end of some doco on ABC tonight about Tricky Dick Smith.
They were filming him working in his office and he was showing how he
didn't need nor use a computer, and dictated all his stuff to the
secretary. He demonstrated this by reading a memo into the dictation

I often read in the NG's about the dissappointments some have in using
off-shore PCB manufacturers.
Well, heres some good news!! - and this is NOT spam.
For the past few months I have been using PCB Cart ( www.pcbcart.com ) - I

The prices are by far lower than any other dealers. I cant beleive the
pricing! It looks too good to be true also with free delivery - has
anyone used them? Are they any good?
The forums look interesting but not much traffic. Apparrently they

urgent ..need info on large size TV
******************************************
We are very confused. So many technologies.
Would like a 50 to 56 inch TV or thereabouts.

I have a Garmin Zumo GPS that resides on a motorcycle outdoors.
There are gold-plated contacts on the bottom of the unit where it mates with
its mounting cradle.  There may be 20 pins in close proximity to each other
along with a 4 pin power lead, a small mini-USB to goes to the ...

I have a device with 34 digital (5V or 0V) inputs. Only one of the 34
can be 5V at any one time. I'd like to know the number of input which
is at 5V. I can think of two ways of doing this:
a) 5 eight-bit shift registers. Each input is connected to a shift