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Circuit Bench

  • VCO CMOS 4049 (CB24858E)

      This is a simple voltage-controlled oscillator using the 4049. The base frequency is given by C1....

  • SCR Trigger Circuit (CB16413E)

      In the figure we have a very simple trigger circuit for an SCR that powers a 12 V lamp whose...

  • Siren 555 (CB10651E)

      This circuit was obtained in a 1999 English magazine. We can easily assemble it with a BD136 or...

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