Two SCR dimmer (CB7206E)

This circuit was found in a Motorola Manual of 1965. The circuit has neon lamps as trigger elements. Equivalent SCRs can be used.

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a Wheatstone Bridge with Audio (CB25890E)
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Light Activated Relay (CB948E)
This circuit uses a photocell as sensor and a sensitive relay according the power supply voltage....
Darlington Linear (CB6122E)
This circuit was found in a 1964 Electronic Design. The circuit makes use of transistors of the...