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Saturday, March 29, 2008

Frank's Box

Here's the plans for the Spirit Communicator Device
Frank's Box.
Feel free to join the discussion on

Best wishes
Leigh

1 comment:

Box maker said...

That's the old stuff! I've re-designed the circuits for single supply, instead of the +12 and -12needed for the original op amp designs. I also stopped using tuner modules from car stereos, as they tended to be very noisy. The home radios were kinda poor, so I've been using digital radios from walkman like units, and even clock radios. The (or at least some)digital radios use an analog tuning voltage generated by a processor.