This circuit was found in a 90s EDN. In it we have the use of LEDs and diodes to stabilize the supply voltage of a CMOS load.
September 2016 - It can be obtained from Mouser Electronics coils for inductive battery chargers...
This traditional unijunction transistor configuration was found in a 1980s documentation. The functions are...
Found on 90's Popular Electronics, this circuit triggers when the microphone picks up a sound. The...