wigwag setup?

i have a setup for alternating headlights, but it doesnt operate in the way you describe. it operates in a L R L R L R sequence.

Do some research in to microcontrollers.  They are small, cheap, and user programmable to do pretty much whatever you want them to do.  Do do an intricate setup like you have you will need a dedicated electronic controller.  I can almost guarenteed that that is how EMS vehicles do theirs.  Also, with a microcontroller you can program it so that the brake lights still work while the wig wag is active.Kevin Pierson

Kevins right, a microprocessor is the way to go. If you dont need this asap, and are interested in making it yourself, you can learn how. Parallax is a company that not only makes these chips, but also sells a kit called the "basic stamp starter kit" or activity kit. Its about 100.00 and has everything you need to get started. they also have a forum much like this one with lots of knowledge and helpful people. They will help newbes, but i would suggest getting the kit before participating.

If you want to do it on a budget look in to the 8 bit Atmel AVR line - for under $5 you can make a parallel port programmer, obtain all necesarry software, and buy the chip for your project.  However, you will still have to learn how to program it!Kevin Pierson

i have been doing a bit of tinkering myself lately. Any idea where I can get a DTMF decoder chip? (not surface mount... i drink too much beer!)

jeffwhiteman wrote: i have been doing a bit of tinkering myself lately. Any idea where I can get a DTMF decoder chip? (not surface mount... i drink too much beer!)

I've used the 8870 from CP Clare a few times. Available in an 18 pin DIP from DigiKey. Needs a 3.58 MHz color TV crystal for a timebase. Datasheet here: http://www.clare.com/home/pdfs.nsf/www/M8870-R3.pdf/$file/M8870-R3.pdf

thanks. exactly what I was looking for. Do you know of a supplier? I just did a search and didnt find much

nevermind, just re read your post