Suggested by Raytheon in 1967 documentation this circuit uses a lightbulb and LDR optical coupler of the time. The transistor determines the maximum current.
March 2017 - Mouser Electronics announces its new TPSA89 voltage regulator from Texas Instruments with...
This Harris circuit from the 90's is intended for recording old EPROM memories. The circuit uses...
We found this circuit in an old Radio Electronics. The transistors can be the BC548. The circuit...