Re: Programmable IR LED Flasher Circuit -- How to Build?


First of all, it is often hard to build "one of" and make it for less
than a commercial unit. Even metal boxes are $10 these days. So I would
build it only if the item were superior, or you want to learn.

Learning.


I generally build things that can't be bought.

Now how many patterns do you really need? Lets say the pattern lasted 4
seconds. In any one second period of that 4 seconds, the led could be
one or off. So enumate the possibilities, with each digit below
representing one second period:
0000
0001
0010
0011
..
..
..
It's a field programmable unit, but this is a good approach and would
probably accomplish the same thing. For practicality, this works.

I'm pretty familiar with K-maps, so maybe that's the way to go. I just
wanted to know how it worked -- if it's a microcontroller, then fine.
I just really wanted to know what was inside of it. It's like having
the schematics for an Atari 2600 or TRS-80. I'll never build one and
try to sell it as my own, but it's very interesting to look at them and
see what made them work.

I like your idea of just making different patterns. I wouldn't need
more than 7 or so assuming it would be used by 7 different units.

Thanks.

.

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