Electronics Forum / Basics / October 2006

I have a GPS that uses a piezo for proximity alarms.
I HAVE to have it louder.  With help of the boys over at
electronics.design I have found the piezo and unsoldered it.
Here is a pic of the board to show you why I had a problem

I have a small DC motor. i want to measure the torque. NO datasheet of
any kind.
I used 15lbs (6.8Kg) weight attached to 1.1 cm of the shaft (motor
geared at 1/720 so it turns about 8 rpm). Can we say that the motor has

Six Fantastic PLC Siemens Simatic to sell, all perfectly working, all
perfect cosmetic conditions, like new.
CHECK NOW!!! ONLY FEW DAYS LEFT!!!
Look here on ebay:

Adobe Audition seems to be able to change the pitch of an audio file
without changing the speed at which it plays.
http://www.adobe.com/products/audition/overview2.html#kmhead3
"Time and pitch processing: Change tempo without shifting pitch — or

I've been toying with these Luxeon white leds and the data calls for a
current regulated supply.
I'll assume the reasoning for any LED to require a current regulated supply
is for a consistent, unwavering brightness level. (?)

I need a circuit for building a volume low-pass filter. why?
The problem is that every time there is a commercial on TV they
increase the sound level. I want to combat this by building a maximum
sound cap limit (adujstable via Pot.). It should work on all frequency

    I am looking for both an integrated (IC) powerline
modem and an integrated comunication "error controller".
I need the second device because I've heard someone
saying about the powerline which it might be full of noise

What are the sample rates and picture resolution [in pixels X pixels]
of the professional progressive [non-interlaced] linear-PCM video
format used today? I beleive linear-PCM video signals are used in
professional studios.

I am new to all of this...I am trying to get a 4 ft strand of rope
lighting to work on a battery (alarm panel 12 volt I think) with a
switch in between.  When I connect the rope lights to the battery
directly it lights fine.  When I wire the switch, I take the two ends

A long subject line, I know. Anyway, after having another light bulb
fail in a bright flash when I turned it on it got me to thinking about
somehow limiting the inrush current. If I remember correctly the
filament has a much lower resistance when cold and that's why they

salam

Hey all;
I'm working on using an analog switch (MAX4661) to replace a relay in a
footswitch unit for my guitar effects. This particular switch will be used
to control amp functions - in this case all that is needed is for 15vDC to

An oxyacetylene flame -- due to its high temperature -- can cause
nearby air molecules to ionize. Does this ionization cause electrical
disturbances that can be heard on an AM radio? If my neighbor is using
an oxyacetylene torch will I hear the electric noise on my AM radio?

I have a new product I invented. It's a LED fish strike indicator.
As I found out experimenting with LEDs, getting the proper current is
the key. My product uses two 5.8mm dia. button batteries. I first used
two #10 air zinc hearing aid batteries (1.4v, 90 mAh)  but found out

I have a couple strings of new Halloween lights, which are essentially like
the small incandescent bulb Christmas lights (not LED) that plug directly
into AC mains (120V).  I would like to splice several of these lines
together to make one long string of Pumpkin lights.  Each run ...