1,5V Thermometer (CB21280E)

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

12 dB Attenuator (CB3908E)
This circuit can be used with receivers to attenuate signals that may cause interference. The...
Comparator with AND gate (CB9407E)
This tunnel diode circuit was found in American documentation from 1966. The tunnel diode is the...
DC-AC converter (CB12410E)
Published in 1988 in Hands-On Electronics, this circuit converts the 12 V of a battery into 120 V...