This circuit was found in an Elektor from the 90s. The integrated circuit is uncommon today. This integrated circuit consists of a temperature sensor.
This circuit for signals around 4.5 MHz for old analog TV was found in the September 1992 Radio...
The circuit shown is a commercial electronic voltmeter sold in Japan in the 1960s. The circuit is fully...
This 80's circuit can be implemented with modern equivalent FETs with lower on resistance. The...