Bob's Box of circuits

Here's a few circuits and some little utility programs,
I hope you'll find usefull.

(updated 4/21/2006)

Circuit Schematics & Programs

DTMF decoder

Eprom Ider circuit

Eprom Ider Text file

Telephone auto answer

 2 Tee audio oscillator.

 UnBalance to Balance audio

Audio Pads Program

Web Page Counter Program

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