Full Wave Control (CB6554E)

This 1968 Texas Instruments circuit uses diacs of the era. SCRs can be modern equivalents according to the controlled load.

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SCR Passage Alarm (CB13378E)
We found this circuit in an old documentation from the 70s. The sensor is an LDR that must be...
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Intermittent Tone Generator 556 (CB19099E)
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