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 is from 1997 documentation. It uses CMOS circuits to produce the effects, being...
This circuit was obtained in a 1974 magazine Radio Chassis Television, but as we can see by the...
Found in a 1967 publication by General Electric, this SCR circuit generates voltages of 120 VAC at...