Electronics Forum / Electronics / February 2005

Hi, Just getting a bit of an electonics bug after setting up a nestbox IR
CCTV cam in the school where I teach (nothing adventurous - just plug and
play).
I have a problem though that I hope someone can help me with. Basically, the

Does anyone know of company that will make a generic ID card for me
(magnetic stripe, high corsivity)?  Here's the catch:  I only want 5 to
10 cards, not 500.
Long story:

I have a Sony CPD-G400 that wont come out of standby mode. I gave the repair
shop a copy of the Service manual; they are saying the processor has got
inputs but its not doing anything. The monitor is out of warranty, and Sony
isn't selling spares for it here in Australia.

I want to have a go at building a small CNC mill for timber and plastic
cutting and was wondering if anybodys seen a controller card like these
in australia somewhere.
http://www.hobbycnc.com/driverboards/4aupc/4aupc.htm

I have seen the board described in this link.
http://www.seventech.it/english/merlinoboard/2.php
I think that its a good solution to realize an embedded system with VGA
output, in that cases where, to use the PC, is not convenient.

First, let me say that I am a hobbyist with limited electronics
knowledge.
I want to be able to record low-frequency sounds. I have a microphone
with a frequency response of 25Hz-15kHz. I need a pre-amp and have

iam follwing Chester's guide to built propeller
clock.(http://hot-streamer.com/hilo90mhz/electronics/prop_clock.htm).the
main problem iam facing in this method is powering base
circuit(http://hot-streamer.com/hilo90mhz/electronics/prop_clock/schematic2.gif).the

Looking for a very simple (Newby) 5v to 12v circuit, or device, low
cost, to run 120 ma 12v led off 5-6v
TIA

Nimh AA battery charger monitors voltage / temp to cease charging, do
they do this individually each battery, or in pairs.
Confused
Also, best way to recharge solo battery, with another charged battery,

Has anyone here used the conductive silver varnish sold by Jaycar?
Does it do a good job?
How do you apply it?
Is it difficult to apply?

In a few days I am releasing onto SourceForge a piece of Open Source
software (GPL), that controls a Robosapien robot.  Currently the software
supports a $50 USB infrared transceiver.  The current supported transceiver
is an excellent product, but I am hoping to find a dirt cheap ...

Intersted to Jam Over AC lines comunications , and other similar
digital and analog comunications in small area .
Where I can find more information on the subject .
LS

 I am learning the mentioned micro-controller and am trying to drive
two MOSFETS through IO pins of this chip( these mosfets act as switch
to a simple motor circuit)
As far as i know, each IO pin of the uC can source 20mA of current(

I have seen the board described in this link.
http://www.seventech.it/english/merlinoboard/2.php
I think that its a good solution to realize an embedded system with VGA
output, in that cases where, to use the PC, is not convenient.

I have an old Western Digital Caviar 22500 hard drive that failed. I
hate to see good electronics go to waste. I salvage almost anything.
I am trying to get the hard drive spindle brushless DC motor to run.
What better controller than the one that came with the hard drive? I