Found in an American documentation from 1968, this circuit senses the temperature through an infrared sensor of the time. The indicator is analog.
This circuit is from an old American documentation using as indicators for the flip-flops neon...
This circuit that uses only discrete components (transistors) mimics the sound of an American...
July 1017 - Maxim MAX17290 and MAX17292 PWM boost controllers can now be purchased from Mouser...