🚀 go-pugleaf

hort@hollywood.ems.cdc.com (Mark Hortman) writes.......
> I was thinking it might be as easy to use my PC and it's gameport as a
> A/D converter and use it as an O-Scope.  
> Anyone done this for 5 or 12 volts? Seen any free/share ware to help?

I have available a 500+line file of C-code and  schematic for a 6-transistor
Analog-Digital converter, that on my 12?MHz AT will perform 15,000+
acquisitions per second. Yep....successive approximation. And dirt cheap
R-2R-4R-8R....DAC, and really crappy one-transistor comparator. You can use
Turbo-C to paint samples onto your PC screen, as "realtime" scope.
Works through your Parallel Printer Port. SEND ME MAIL if you want the file.

Of more interest is my second pass at a CHEAP 500 picosecond risetime 
sampling scope. It will need A REPETITIVE SIGNAL. Design not finished yet,
but uses 6 ICs, giving one channel. Probably 9 ICs for 2 channels. 
Allen Sullivan  Enjoying Tek556 scope (85 pounds), & HP852A SpecAnalyz (100+)