This two-transistor circuit was found in a 1966 US documentation. The power transistors are of the time. The system is intended for cars with contact breaker.
We find this circuit in a 1970 publication. Transistors can be replaced by current equivalents and LDR is...
This stage was used in old audio ampliiers and radios from the 1950s and 1960s. It uses one of the...
January 2017 - Texas Instruments' new TPS54200 integrated circuit for excitation of LEDs with a...