Electronics Forum / Electronics / August 2004

Does anyone know a good cookbook for 555 timer?
Thanks.

Electronic electricity repository is an energy concept that aims to accumulate
and store electrical energy from any source.  The storage would be intended to
accommodate such things as electric vehicles, home heating, etc.  The best
example is the EV - an electric car that would run ...

As new, still has head protector and original styrofoam box
http://cgi.ebay.com.au/ws/eBayISAPI.dll?ViewItem&category=1247&item=5117921240&r
d=1&ssPageName=WDVW
In Australia
Paul

My monitor has started displaying some narrow yellowish bands across
the screen. The bands disappear as I move the cursor across them,
then they reappear.
Am I correct in assuming that my monitor problems have progressed

I've been trying to design an infrared receiver, but have several grey
areas. My transmitter signal is a simple 10us pulse with a period of
2ms (500Hz)- it's just a remote 'on' switch. The system needs to work
in bright ambient conditions over at least 40m from a mobile hand-held

I recovered an old power module with motor out of a Fishher & Paykel
Washing Machine.
My interest would be to run the motor with speed and direction control
in other applications.

Has anyone had any experiance with fixing these beasts.
Looks exactly like your normal plugpak that Dick Smith sells, but has
no weight and in my case has an oddball rating 5V @ 5A regulated.
Not easy to pull apart as its in a sealed plastic case which Im

This is a long shot, but I was wondering if anyone knew where I could
possibly find a schematic for an Omni 525bt UPS...
The battery blew acid under the PCB last year which caused a short in
the house.. Now it's gone, and with it two tracks connecting to Q7

Does anyone know of where one can get unbiased (i.e., objective)
transistor leakage power figures for the various CPU processors? I
have checked various benchmarking web sites, but sometimes it is hard
to get the feel that it is not subjective.

I have an HP 54602A digital scope that I picked up at auction many moons
ago, without manual or probes. While the manual hasn't mattered much, I've
been using cheap-arse 20Meg probes, which have been fine for the majority of
stuff I do, but it is a 150MHz unit, and I wouldn't mind ...

Every time I use my washing machine it manages to turn on all of the touch lamps in my house. Only the washing machine does this. I
can turn them off during the cycle but it will turn them back on a few minutes later. I think it is during a certain event such as
the motor starting ...

Since it has been remarked in another thread that wood is a conductor,
and since trees are as big as radio wavelengths, I'm wondering if there
is any convenient way to measure how much electromagnetic radiation a
particular tree is picking up at a particular radio frequency.

I have an extra Fluke 73III DMM with probes, great shape, had for 1 year,
bench work only. Photos upon request, asking $75 plus nominal shipping.
I also have 3 micro GPS modules with documentation. Low voltage RS232
outputs. 3.3V input, 12 channel w/ DGPS inputs. Asking $100 for all ...

Hey guys,
I'm trying to decide which brand of whitegoods (fridge and front loader
washing machine) to buy based on their reliability and quality.
I like the design of the Fisher & Paykel refrigerator (E522BRX) and a

Is it correct to say that a varactor-diode's bias is voltage dependent only,
with only rev-bias leakage current consumed from the bias network?
If you were coupling a 2v p-p AF signal,..would it be so that provided the
bias is greater than a volt,..the thing would work OK,..or is ...