Electronics Forum / Electronics / September 2004

Hello there, I have 2 viewfinders from old camcorders that I wanted to get
working with an external NTSC video signal.
If anyone could supply me with pinouts and/or general information, I would
be massively grateful. If not, does anyone have advice on the best way to

What's the easiest way to get analog voltages from a computer? The
current shouldn't be a problem as the signal could be amplified.
Can you just connect the data and ground pin from a serial port and
send all 0s for 0V, 1010101010 for 1/2 voltage and all 1s for full

This might sound like a silly question to some. I was considering purchasing
a 66 cm wide screen TV. It's about 76 cm wide. The cabinet in which it's
supposed to fit is only 78 cm wide. Leaving a space of only 1 cm on each
side - Is that sufficient. I know that you're supposed to ...

Content free! :)

I am student located in Melb.
I am aware that there are some cheap approaches in making diy pcb.
I am too aware that you folks are very skilled.
I was wondering if anyone can aid me fabricating pcb for me?  I can pay a

I am doing some research on the UK Electrical national gird system and
looking for lots of info.
I am after stuff like national layout, means of control and power
regulation, safety issues/procedures, transmission voltages and the like.

Does there exist and if so where, a document with the guidelines for
aus.electronics?  The reason I ask is that I might have a few ebay auctions
coming up of interest but I have no desire to spam the list.
Cheers

  I have this unit in for repair. The play back picture is always
pixelating (its not the LASER already tried it). Mainly in the top part of
the pix. The blocks in the upper part of the pix are actually from the
bottom of the pix. Why?

All,
House pressure pump died yesterday arvo.  After ascertaining the unit was
still able to turn easily, I discovered the starter capacitor had blown.
After much frenzied searching through electric motors for something to get

All steppers that I've seen are spec'ed for a certain resolution, ie.
1.8 deg or 3.6 deg, etc. I want to control a sonar "head" with a high
degree of accuracy. I already have two Hitec HS-311 servos, and was
plannign on using these, but the stepper's ability to rotate 360 degrees ...

Hi group,
I want to have a smallish robot (20 - 30 cm long) accurately detect the
direction 2 or more FM radio beacons are in relation to it. I have found
very little googling for it. Does anyone have a curcuit for a reliable and

Is it feasible to use a Backup UPS device as a power inverter? Not for
continual use but for occasional, s.a. 60 min at a time to run a laptop,
battery charger for electric drill, etc. ??

Can anyone help me with information on belts and tyres to suit this model of
cassette player or an Australian company that still supplies rubber goods of
various sizes .William

I was talking with a guy a couple of months ago who told me about an OTC
CCD by one of the japanese camera companies which when paired with the
correct filter became an excellent IR sensor.  Anyone know what these
components are?  Thanks.