Flat response amplifier CIR16474S CB9390E (CB9390E)

This circuit was found in a 1970s documentation. The integrated circuit used is uncommon today.

High voltage switch (CB6929E)
This circuit, for frequencies up to 100 kHz, was found in American documentation from 1970. The...
Improvised Christmas Lights (CB18712E)
Here is an interesting practical idea that allows the use of a common fluorescent lamp starter to...
Servo Amplifier (CB5420E)
The integrated circuit used in this 80's application is not common today. However, modern...