T&L Publications

No. An op-amp wouldn't work because of clipping.
A very stable voltage reference for the
output voltage would be a reverse-biased Zener
diode. You could then use a potentiometer (as
a voltage diver) to reduce it to the desired
voltage.

Here's the data:
o Trainer Unit :
SDK-85, from urda.com
o Associated Text :
"Microprocessors and Microcontroller
Fundamentals : The 8085 and 8051 Hardware
and Software" , by William Kleitz, from
amazon.com

Did you enjoy the international robotic
World Cup that was broadcast on PBS?

There are many available microcontrollers, and many of those will do any specific application well. Rather than advocate a type vs. another, I'd suggest understanding the basics. For this, I'd suggest buying an URDA (www.udra.com) trainer SDK, for the 8055/8051. Then I'd use a text (I don't have it ...

That suggestion of Lo-Jack sounds the best.

GPS sounds like overkill.
Would a radio transmitter and matching
rerceiver work? They're both available, in
kit form, at www.jameco.com. $13 each, plus
postage and handling.

It's so simple, I doubt that you'll even
need a schmematic. Try old children's books on
electronics.

Thanks all! I found a kit at a mail-order
spot, JAMECO ELECTRONICS, that sells a kit
for $12.95. Since, I work a few miles away,
I'll just order it on "will call" and save myself
the shipping charge.

I'd like a low-cost way to broadcast the
output from my portable CD player from the
AM/FM radio speakers from my car.
There is a kit that does this for $40, but
it seems pretty overpriced.

It depends on how powerful a fan you want.
For a little, personal fan, you could just hook
up a solar cell to a toy airplane. Probably costs
just a few bucks.

If economy is a consideratrion, you may wish
to use ultrasonic range-sensors (A good choice is the Polaroid Kit, $50 from Wirz.com), and then
tie them into a stopwatch chip.