This is a simple game circuit Using two SCRs 1st 2nd Circuit Diagram.
This control circuit is designed to lock out the other SCR when one has
been triggered, so only one lamp will light. Indicator lamp Il is
controlled by SCRl. The operator simply presses switch Sl. Lamp I2 is
similarly controlled by S2 and SCR2. With both switches open, neither
lamp is lit. The result is insufficient gate current to trigger SCR2
into conduction, so lamp I2 does not light.If S2 is pressed first, the
reverse situation occurs. Once one of the SCRs is activated, it is
necessary to open S3 to tum the light off.
Using two SCRs 1st 2nd Circuit Diagram
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