Using a pair of period A/D converters, this 3-digit circuit was found in the 1992 Radio Electronics Experimenter magazine. The sensor is a thermistor.
To fit the integrated circuit under test, we used an 8-pin DIL socket. Observe the fitting...
This receiver can be used to receive signals from the previous circuit transmitter. The circuit is...
This is the 1968 MR480 commercial cassette recorder circuit. The circuit was fully transistorized and...