We find this circuit in an American 80's documentation. No further information about the transformer is given. The circuit serves as a reference for any repair work.
This is the traditional configuration of na Astable Multivibrator using two NPN ttransistor....
Reversing the switching action, with the output going high when the input is low, can be done by...
November 2016 - Texas Instruments' new TPS62135 and TPS621351 step-down converters with a wide...