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Low-power consumption AC flashing light circuit diagram

2017-02-05 21:12  
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Low-power consumption AC flashing light circuit diagram
It uses the charging and discharging characteristic of capacitor C and the negative resistance characteristic of triode V under the breakdown condition to constitute a squegger oscillator. After getting power, 220V alternating current is half-wave rectified by diode D, current limited by resistor R to charge for C. When C's both sides voltage rises to V's breakdown voltage ( the actual value is approximately 9V), then it rapidly discharges by V to make the LED connected in discharging loop illuminate. After the discharging ended, V regains the closure condition, C starts to charge and to be redundant the above process. V has the synchronized signal which added to base to trigger the avalanche. Electric circuit working actual value is only 0.17mA.