Alarms & leds

Archiver

Hello,

Question 1: LEDS
I'm trying to create a scrolling LED display (Letters and graphics if
possible). I'm not having much success. My problem is that I need
control over each individual LED and of course, I do not have enough
pins on the stamp (similar to a pixel on a monitor). Does anyone
know what additional IC I can use to control each LED from the
stamp. I'm using 9 segments and 10 characters? (Each segment is a
LED).
Example: each dot is a LED
..............................
..............................
..............................

Question 2: ALARMS - TRANSMITTERS
The transmitter for my car alarm has no antenna, yet it has good
range. What type of signal is being sent that requires not antenna
on the transmitter?

Thanks,
FS

Archiver

ok mira para la alrma de tu carro si necesitas antena y la antena la
trae el receptor y el transmisor o sea se requiere dos ..

acerca de display de leds se requiere primero hacer un programa de
mutiplexeo ,y ver si se requiere uno o mas pics...ver libro de
paralax book....esto te puede servir......
--
jose jaime gutierrez chavarin
e-mail: jjgch@t...