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.
The HV2405E integrated circuit is not very common these days. This circuit was found in the August...
This circuit was found in an American publication from the 60's. Transistors are germanium types of...
This strobe light circuit for car spot adjustment dates to 1987, when there were no electronic resources...