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Low_voltage_lamp_flasher_that_uses_a_PUT

2014-11-02 11:50  
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Low_voltage_lamp_flasher_that_uses_a_PUT
This circuit shows a PUT used as a lamp flasher, where the supply is only 3 V. Q1, R1, and C1 form a relaxation oscillator. Q2 and Q3 form an SCR flip-flop. Notice that C4 is not a polarized capacitor. For the values shown, the lamp is on and off for about 0.5 s each.