Electronics Forum / Electronics / January 2009

       I am an engineering student and want to run a home project by
myself on DSP. Lets say some audio based work for myself. But I am in
a vast ocean to make a decission on which I shall work on. Can anyone
give me an idea to do forth? Wishing you all happy times.

Dear friends,
I have got an AC current detecting circuit. But I failed to
understand. Can anyone help me? Thanks a lot in advance!
[url=http://images.elektroda.net/17_1233301094.jpg][img]http://

Had a thought that there are 'legacy' security video systems that
might be updated to current technology.
Although these systems may work fine over coax to a recorder (most
likely a VCR), I was thinking that maybe a 'black box' unit could be

Thought I'd share this I came across on another group:
http://www.elcafevirtual.com/julio/
Model planes made entirely from old HP calculator chips and parts.
Dave.

Bit of excitement today...
Got myself stuck in a lift after a power failure, half way between two
levels.
More than an hour later the Fire Brigade had me out through the very

I have a SP72G BenQ Monitor which worked fin for 3 years until one day
when I switched it on and it displayed teh BenQ Logo for a second and
then faded out in a series of colours before switching off.
If I try to switch it back on it does the same but a lot faster. I

I replaced (3) 1.5V AA batteries used in a called I.D. unit  with a
wall transformer that used to charge up a cell phone.
It puts out 6.17 volts DC at .7amp. The displays shows Set Language
but goes no further.

I need to make a remote control detonator .
Anybody could give me schematics that work?
Arturo Magidin, sans .sig

I have one of these (http://www.bestgrowlights.com/site/403863/page/
941189) but the bugger blows way too much air and is very loud.  So I
bought one of these (http://www.plantlightinghydroponics.com/fantech-
variable-speed-fan-control-p-1487.html) and that did slow things down

Tuesday, 20 January 2009
Canberra correspondent Bernard Keane writes:
The production and distribution of ethanol as an alternative motor
vehicle fuel source will increase greenhouse gas emissions over

What is a good source for speakers?  I have a 50mm 16 ohm 1.5W speaker
I need to replace.  Didn't see anything at Radio Shack or Newark or
Allied or DigiKey or Mouser.
Tom

I'm looking for a design (schematic etc.) of a 100W amplifier (more or a bit
less) that I can nonnect to a sinewavegenerator for a frequency range up to
30kHz. I want to use a piezo tweeter.
Please all the info you have is wecome!

Nothing makes my sausage hotter than virile, muscular boongs greased
up for my pleasure!
They will make you hard as a diamond.
dcfra.net

Does anyone have a manual for this rather funky watch - can work most of it
out but as it can do so much need the manual. There was a copy floating
around the net on geocities but searching produces nothing.
Can u help?

After my airconditioner failed the other day, and being reluctant to pay
a technician to come and fix it, I've been taking a look at its
electronics board.
It's clear that its power supply circuit has failed. From the board