This circuit is from a Texas Instruments manual from 1968 but can be applied to current controls using modern Triacs. The circuit is for a current of 25 A per triac.
This circuit is an application for an operational amplifier with field effect transistors from...
This circuit is from a 1993 publication and can be implemented with any optical isolator that has...
This circuit uses a diode as a radiation sensor. The operational ones are old because the...