Electronics Forum / Electronics / November 2006

MY TV HAS TURNED ON AND OFF ALL BY ITSELF THE LAST TWO DAYS. 10 OR20
TIMES. I THINK IT MUST BE SOMEONE WITH AN ELECTRONIC DEVICE. WHAT KIND
WOULD THAT BE. AND HOW FAR AWAY DO THEY HAVE TO BE. IF ANYBODY KNOWS,
THANK YOU

It seems to me important to agree on criteria for deciding whether a
particular circuit or signal is digital or analog
One criterion is intended use; there seems to be general agreement about
that, so I don't address it here. Another criterion is the nature if the

i want electro magnetic spectrum

Any thoughts on solving the following issue?
I have a Saltmate pool chlorinator. For those who don't know, the operation,
as I understand it, is that two plates are immersed in a salt solution (the
pool water). Current is passed through across the plates, releasing chlorine

I have built a full size Dalek. For the voice I made a little kit with a mic
plugged in so it sounds like a Dalek. Its not very loud though. I have tried
two differant amps, a 45w and a 7w one. Both suffer from terrible feedback.
How do I stop feedback, apart from having the gain ...

I Hve a 27" Daewoo DTQ20v1SCN that takes a very long time to warmup
sometimes hours don't know what's wrong. anyone had this problem
before.
Need HELP Please

Hi, i recently saw a  LED  flashlight (mag lite) format with an extremely
high intensity light. Does anyone know where i can get one or how to make
one?
Thanks

Anyone know what ever happened to the 100kHz crystal as used for generating
spot marker frequencies on old time HF receivers?
I visited the website of Hy-Q Australia and they don't go that low.
There are quite a few on Ebay, all pulled from old equipment. I would like a

As is the case with most folks, I suppose, I have an assortment of AC
adapters left over from a variety of now defunct electronic gizmos. The
adapters vary in terms of output voltage and current, but I'm wondering
if they can be used for other than the cell phone, radio, whatever ...

I can't figure this out. Four position, 4 wire switch. Power wire(white)
goes directly to the switch and also goes directly into the motor. Common
(black) goes directly to the switch, nowhere else. Each of the other 2
switch wires go to capacitors. The other end of both ...

Has anybody ever heard of "Kalirel" electric heating before? It is
mean't to be more efficient than Night Store Heating ( not difficult!)
with a lot more versitility so you actually have heat when you need it
and not whilst your out at work all day!! If anyone has this installed

Despite being registered with telephone preference services we still get a
lot of silent and marketing calls. I'm looking for a box of tricke of some
software to help...
What I'd like to do is silently divert all "caller ID witheld" calls to a

Panasonic Inverter microwave oven model NN-S751WF.
****************************************************************
Fault - Oven starts to cook but soon shuts off.
Customer told me one of his children turned the oven on for several

Can anyone suggest a good approach to promote a simple electronic invention
to mass-marketing appliance manufacturers?
I need to know how to find out who to contact to get an audience, pitfalls
to avoid, how to gain credibility, etc. I am not an experienced

Basically I am set out to build a power analyzer,
which will include :-
-1 phase supply monitoring-
-Surge detection capabilities of the order of 10 microseconds