This variable oscillator with power step for alarms was found in an American documentation from the 90's. The power transistor must be equipped with a heat sink.
The idea of this circuit from a 1960 publication is simple: we can switch the transistor being...
The difference between this oscillator in relation to the previous one is the use of emitter...
We found this circuit in an old English documentation. The integrated circuit is of a specific type of...