Modulated HeNe laser power supply (CB21186E)

This high voltage gas laser source was found in an American publication from the 1990s. The circuit has an input for PWM modulation.

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Home Security System (CB4868E)
This control panel allows the use of NO and NC sensors, turning the alarm on after 30 seconds...
Lamp Cruiser effect (CB17321E)
This circuit, found in a 1989 publication, only works with incandescent lamps. The maximum power...
Battery Charger (CB6394E)
We found this circuit in a 1968 Electronics World. The potentiometer should be set to trigger the SCR...