Source for LASER (CB7843E)

This power supply for gas laser (HeNe) was found in a 90’s Popular Electronics. It generates from 1300 to 1500 V using common components.

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Wearable Sequential 4017 (CB19146E)
The idea of wearables is not new and does not necessarily need to be implemented with...
Transistor triac trigger (CB21478E)
Two transistors on a regenerative switch are used to trigger a triac. This circuit is from the RCA...
Stable optical coupler (CB7410E)
This circuit is from NASA documentation from the 1980s. The circuit shows how to obtain a stable...