I want to pulse a set of 6 LEDs. It should be one led at a time, not all 6 together. There is a site that shows how to pulse a single LED, but how do I get to pulse 6 of them, actually even 4 will do.

 

The LEDs will run off a 3.7V @ 1070 mA.

 

I tried to think of a simple solution without messing things up as space is also a constraint, but I ain't getting nowhere.

It's funny, I read this thread and remember a circuit I got off the net months ago, and I found it again, just now, too!!!

 

Anwyay, here:

http://www.kpsec.freeuk.com/projects/heart.htm

Is a sequence of lights going in order... is that what you want?

Or a 4017 ICC paired up with an input 555 would count up to 10.

 

7 segment displays use a 4026 ICC and I've also seen it done with a 4510 and 4511 ICCs.

is there any magical device that would convert DC current to AC current?

i.e. Give a sine wave output for a straightline input.

Well a 555 ICC could make a frequency, astable or bistable... 555 ICCs are rated up to 1Mhz so you could generate the 60Hz that the mains produces (at least it's approximately 60Hz and that's in the UK).

 

Piezo electric crystals and a chattering relay are also possibilities.

 

This was discussed here: http://www.scienceforums.net/forums/showthread.php?t=5509