Delayed Pulse Generator (CB6470E)

This circuit was found in a 1967 documentation. The switch diode is a component of the time and is difficult to find today.

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Hysteresis Light Alarm (CB6436E)
This circuit is from a 90s documentation. It has a hysteresis and uses a light sensing bridge. The...
BQ25872 Switched Battery Charger
August 2017 - Texas Instruments' new integrated circuit BQ25872, a 7-A keyed battery charger with...
27 MHz Transmitter (CB18517E)
We found this portable transmitter that reaches up to 200 meters in a Japanese publication from...