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Sequenced flashing AC flash

2017-02-01 02:21  
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Sequenced flashing AC flash
This circuit uses a simple circular counter. The control ports of triac form a part of load. And the three incandescent lamps brighten up in turn and usually one lamp lightens at one time. Impulse frequency can be adjusted which can control the change of lamps. Time period for the change of lamps can be set from 0.1 second to 8 seconds. If the circuit in the dashed box is added, the lamp lightened before will keep light when the next lamp lightens.