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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Voltmeter (CB6877E)
This is a simple 1-digit voltmeter circuit using voltage comparators. It was found in a 2004...
Adjustable Output Regulator (CB5872E)
This circuit is from old documentation, but the regulator may be 78xx series equivalent and the...
Automatic Level Control (CB25899E)
This circuit appeared in the November 1995 issue of Electronics Now magazine. The circuit uses...