This circuit is used to test SCRs like the ones of TIC series. The simulation shows the power line half-cycles applied to a load. The load is an incandescent lamp.
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The wave shapes in the circuit can be displayed by the virtual oscilloscope of the MultiSIM. Observe the adjustments for a correct display. The upper signal is the voltage applied to the load and the lower signal are the trigger pulses produced by the diac.
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To download the simulation files and Netlist - click here (ni0007.zip)