Electronics Forum / Basics / July 2006

I have seen radio tower when i dove. An idea struck me, i would like to
connect my FM
antenna to the lightning conductor running down the apartment. I intend
to use a 3 A

i have a couple questions about kirkhoff's laws. first, i'm curious
about whether they're actually used in practical work. secondly, i
can't puzzle out what they imply for the case of a circuit that has
nothing but two batteries, each with its positive terminal connected to

I was playing my guitar amp(digital) today and noticed after turning my
guitars volumn down all the way that I heard some type of voice in the
noise(sorta like those that think they recorded some ghosts talking.)
The first think I captured is something about god or eygpt or ...

Hello, I am having trouble getting a very simple 555 timer circuit to
work. I have studied hard the documentation for the various pins and am
trying this simple circuit, but the o/p  PIN3 stays high for just a
fraction of second when I take trigger input 2 low. The values of R or

Ok so i been lookin all over the net for a lot of stuff related to
this. This is what im tryin to do:
Hook a light bulb to my stereo so that it lights up to the beats or
bass.

You guys all read books like "The Mad Scientist's Club" when you were
kids, right?
I recall that in this book they (the pre-adolescent boys in the Mad
Scientists Club) devised (among many other things) an intercom system

Greetings All,
I'm trying to build a stepper motor driven indexer. The goal is to use
the inherent accuracy of a stepper motor and encoder to index a wheel.
US Digital sells an IC that uses the output from an encoder to

I have been looking at schematics for battery charger. All the circuit I
have seen so far seem to stop the charging to the battery from the source.
most of them uses a pnp transistor to bypass the charge battery , therefore
creating a link from the source + to ground.

I have a CRT monitor that has a dodgy Vertical deflection coil - the
thin copper wire seems loose in places and far too often I can hear it
oscillating - it's a very high pitch annoying noise and i'd like to fix
it. My first thought is to smear some sort of adhesive or epoxy ...

i have seen alot of products that allow you to listen to your ipod or
mp3 player through ur car stero,
Im lookin at making something like this but on a larger scale,
something i can hook my mp3 player up to when i have parties and play

I have a set of LTB headphones. These headphones are designed for use with a
PC. They have an amplifier that is powered from the USB cable. Unfortunately
for me, my DFI mainboard seems to have really dirty power on the USB ports,
which causes buzzing and clicking. A fair number ...

I have armed on breadboard the audio Amplifier circuit that this in
page 122 of the book Getting Started in Electronics of Forrest M. Mims
but for some reason it does not work.
Already double checked components and connections but for some reason

I hear dental burrs are superb for hand drilling holes in circuit board
material.
I went to a local dentist's office this afternoon and asked for some of
their used dental burrs.  Either they were afraid of violating some

Hello;
I was disassembling a small power supply transformer that used one "E"
and one "I" ferrite cores; it needed to be rewinded with new magnet
wire. The manufacture used some kind of epoxy to hold it in place which

For a project, I would like to be able to generate very low frequency
sine waves, between about 0.5 to 1.0Hz in frequency. I am a beginner at
electronics. :)
This circuit would be useful to test a data acquisition program I am