Spark timer circuit diagram

Published:2011/7/21 2:44:00 Author:Ecco | Keyword: Spark timer circuit | From:SeekIC

The spark timer circuit is composed of the power switch S, resistors R1 ~ R3, capacitor C, step-up transformer T and the discharge electrode, and the circuit is shown as the chart. When the power switch S is connected and in the positive half cycle of alternating current, the current forms the loop by the VD1, R1, C, VD3, then C starts to charge. In the negative half cycle of AC current, the current forms the loop by VD4, R2, R3, VT and VD2 to make VT be triggered and conduction. R1 selects the 1W metal film resistor, R2 and R3 select 1/4W metal film resistors.



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