Electronics Forum / Electronics / June 2004

This question is more to do with electricity than electronics per se - I
hope that's okay!
The quality of the electricity supply to my house is terrible (North
Carolina, standard single phase).  For *ages*, light bulbs have been popping

    I have an old metal detector that has speaker only for output.
It makes constant noise as there is no discrimination knob.  I'd like
to wire a headphone jack so my kids can detect with it without
annoying everyone.

If you have an old PCB and it's heading for the bin.. then STOP !!
The more components it has, the better. Just hold it horizontal, and up at
eye level.. about 6 inches fromyour eyes.
Hey Presto.. your very own miniature spage age city.

Antique wood table and console radios for sale, repaired and in working
order.

Toshiba 26" (67cm)Color TV
Remote Control
In working order
Coaxial ext/ant input

10" 2 way 100 watt each speaker.
Good working condition
56cmHeight, 24cm Deep, 34cm wide.
Made in the USA

Hello people.
Reading some stuff about workstations, I find that the workstation speeds were
measured in MIPS (Million Instructions per Second).
Q: For someone new in the area, what is the biggest difference between telling

Does anyone have a simple circuit that would power on a few outlets when the
power draw on another outlet is more than 15 watts or so?
Basically, I want to turn on a powerbar whenever a specific outlet is
drawing more than 15 watts and to turn off whenever that specific outlet

G'day folks, if repair techs, etc, are interested in the above 20"
monitor they can have it as long as you can pick it up, (I'm on Mt
Dandenong).
I think it's a GDM-1934 variant, (after doing a Google search), it's

I don't normally do this, but I was so impressed with this Bulgarian
company that I thought I'd pass this on (I've got no association with
them apart from being a satisfied customer):
http://www.olimex.com/pcb/index.html

Our MAGNAVOX MTV-68 colour TV has suddenly come up displaying "CHILD LOCK -
PLEASE UNLOCK". There is no mention of this in the user manual. Can anyone
help? I have tried all the common solutions like code 0711, power on 6-10
seconds, menu and various cursor combinations, etc. It's ...

desperately seeking power supply circuit board for the above projector, have
been quoted 600 bucks for a new one and only paid 40 bucks for the thing at
auction.
Any and all help greatly appreciated

Saw Silicon Chip had designed one but couldn't look at the circuit on
their site...secret Silicon business no doubt. Anyway just wondering
(as you do) if this is a worthwhile kit. Any alternatives, like get
myself a life and stop building things and spend $80 for a ready made

Is there a way to discharge a NiCad cell faster than it would be to just short
circuit it, and without the risk of possibly reverse charging it?
Thanks.

I am looking for some kind of lense to mount infront of a small
photodiode sensor (TAOS surface mount chip) on a PCB.
I want this lense to allow the sensor to view colors better at a
distance of 10cm (As apposed to close up, under 2cm), so something