This circuit was obtained from an American documentation of 1967. The circuit provides a 30 mA output current for driving standard Nixie indicator tubes at the time.
This high current switching stage was found in a 1967 EEE. The power transistor is from that time....
Found in Motorola's 1968 power circuit manual, this circuit has a high input voltage and no...
This circuit is the traditional 555 oscillator that produces a hum in the piezoelectric...