Originally posted by ShackMan:
The alternate blinking (at the same rate) is easy to do with a 555 timer (BB knows what I'm talking about). You tie one LED between the 555 output and positive voltage, and the other between the same 555 pin and ground.
When the 555 output goes high, it turns on the grounded LED. When the 555 goes low, it turn on the other one. You'd have to tinker with resistor values to adjust the "on-time" for each LED (if you want them the same) ... but the flash rate would be consistent since they're tied to the same output.
I've done this set-up before, so it works. <img src=http://www.ezboard.com/intl/aenglish/images/emoticons/smile.gif ALT="">
Rapier wit? This is the end of the twentieth century! I'm using a laser sighted under-and-over twin barrelled wit, with a 7.62 mm floating breech pulse rifle firing caseless one-liners on top, and a 40mm explosive gag launcher underneath. For backup I've got a 14mm pump shotgun firing flechette rounds with 10 barbed comments in each, which can also shoot sabot ego-piercing rounds. Of course when all else fails, there's always the trusty flamethrower which I've strapped to my pulse rifle with duct tape in the approved style.