1,5V Thermometer (CB21280E)

We found this circuit in old documentation from National Semiconductor. The circuit makes use of a sensor from the time.

Telegraph Oscillator (CB6475E)
This small Hartley oscillator uses an output transformer for transistors. The frequency is...
Binary Random Number Generator (CB12196E)
This circuit is from an English publication from 1978. It generates random binary numbers when we...
High Voltage Regulator (CB15531E)
The regulation of high voltages through common semiconductor circuits, such as integrated circuits and...