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 high voltage regulator uses only two passive components. The output is 100 V, but replacing...
This circuit was obtained in a magazine for radio amateurs 73 of the 90s. The circuit is based on...
This circuit is from an old operating manual and can be implemented with operationals types that...