> I'm in desperate need of some sort of "oscilloscope" but don't really
> have the money to buy one at the moment. So I decided to make one

Of all the test gear I have, the one which I find tends to be of most help
debugging and solving problems is the logic analyser. At one time I had
just a cheap 6MHz scope, and realised very quickly that an analyser is
essential when working with micros. I built my first one based around a
68HC705 and SRAM. The next used a 20MHz 16F84, PLL and ex-
mobo fast cache RAM. Both of those uploaded to the PC via serial.
The current one is a 16-channel USB. Each has been invaluable in its
time, and a good spec analyser is not difficult to DIY if you have logic
chips doing all the donkey work

Joe
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