Electronics Forum / Electronics / November 2004

A freind of mine who is an electronics wiz want to built for me and analog
guitar effects box, and possibly also a stereo power amp ( the amp is for
music, not a guitar amp ) , well I looked on the net and saw tons of pages
with schematics, so I'd appriciate if anyone can recommend ...

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I am very new to this newsgroup scene, so I am hoping that someone will have
some tips for me. The issue is that I am using a a PIC16F877 to do an adc
and I am getting floating inputs (The voltage is very stable, but the PIC
reading is very unstable). My circuit consists of a ...

Anybody know where I could find a 30 x 30 peltier effect cooling plate
or some smaller that could be pieced together?
TIA

I am very new to this newsgroup scene, so I am hoping that someone will
have some tips for me. The issue is that I am using a a PIC16F877 to do an
adc and I am getting floating inputs (The voltage is very stable, but the
PIC reading is very unstable). My circuit consists of a ...

The Television
At the same time radio began to achieve commercial
viability in the 1920s, the United States and Britain
began experimenting with "television," the wireless

Greetings group.
Can anyone please tell me where I can get a
TDA1185A TRIAC PHASE ANGLE CONTROLLER?
Or if there is a substitute.

Could anyone give me information of roughly the price to make a case
for a device which is about 6cmx6cmx3cm and has 2 retangular holes and
one circular hole.
Which one is cheaper if the case is plastic or metal?

Dollar store sells cell phone chargers which reduce the 12v vehicle voltage by
about a third with a fairly simple coiless circuit.
Could these be easily adapted to 8 - 8.5 volt chargers?  Maybe put another
resistor in parallel in an RC circuit?  75 ma - 200 ma is all that is needed.

I have lately been interested in proximity detector technology. I see that
the USB devices that lock your computer if you are greater than 2m away are
becoming relatively cheap, but their battery life of the transmitter is only
a stated 2000 hours (I'm guessing less). That means ...

Where can I find the figures to calculate a magntic field strength x
windings to
get a figure for horse power.  I want to build a 3 hp permanate magnet
electric

I bought this unit back in Feb of this year at Walmart. In the past
two months the vcr part has developed a nasty habit of "eating" tapes.
At first it was doing it to the tapes I use to record tv shows. I
thought maybe it was the tapes, so I popped in my tape of Star Wars

is there a material that will stop magnetic force?
TIA

I have just purchased a network cable tester and some cables test for
having a
'ground' and others don't.
Why is it so?

Does anybody who is greatly into electronics and gadgets tell me the
advantages and disadvantages of using a Franklin pocket organizer or their
dictionaries?