Bugeater wrote:Well done statement about the BN Family, brewtat.
What's with all this talk about modern computers. I designed and built my first computer back in high school in 1964. No integrated circuits at that time (at least not affordable for a high school kid) so I used a box full of 1N34A diodes I hand soldered into a matrix for the cpu. About all it did was convert analog numbers into binary but it did work. No software, all hard wired.
Wayne
1N34s! I was looking for one of those the other day to build up a crystal radio to show my nephew. I know, it is cheating to use a diode instead of a cat's whisker, but I don't have any galena around either.
I built a simple 8-light pattern generator with a similar idea. I used a 555 driving several cascaded 4-bit counters, whos outputs served as address lines for a 27xx eprom. The data lines of the eprom drove transistors that drove the lights. One of the address lines went back around and banged the clear input on the counters.
By changing the contents of the eprom I could get different sequences, and by changing the r/c on the 555 I could get different rates.
A programmable light controller without a micro. That was in the early 80's. Now I'd just use a PIC or whatever.