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Circuit Bench

Linear VCO (CB12268E)
This article is from an old publication from 1978. The transistor can be a BC548 and the power...
Triac driver (CB22446E)
The presented circuit uses an optocoupler to trigger a triac. We found it in a Popular Electronics from...
Modulated Siren LM3909 IR5687S CB14290E (CB14290E)
We found this circuit in a technical documentation on the National Semiconductor LM3909. The...