This circuit is from Texas Instruments documentation from the 1980s. The operatinal ones are from the era and the power supply must be symmetrical.
This circuit was found in an Elektor from the 90s. It is a circuit that generates different types of...
We found this circuit in a 1988 publication. A touch of the sensor causes the relay to trip and...
The circuit presented was found in the National Semiconductor Linear Applications Handbook. The...