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.
This circuit was found in a 1970s General Electric documentation. Transistors are uncommon today....
When the lights turns off this circuit will produce a sound like a cricket. When the lights are...
Found in National Semiconductor documentation this circuit converts a rectangular signal into an...