This circuit generates rectangular signals from 2 Hz to 20 kHz using an operational amplifier. The circuit is from 1984 Radio Electronics. The power supply must be symmetrical.
The purpose of this circuit found in a 1967 GE SCR manual is to control a heating element. The SCR...
We found this circuit in an old documentation. The operational amplifier of the time can be...
This power control from a 1968 Motorola manual shows how to use a contemporary diac as a...