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LED_FLASHER_USES_UJT

2017-02-05 16:40  
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LED_FLASHER_USES_UJT
LED_FLASHER_USES_UJT
LED_FLASHER_USES_UJT
LED_FLASHER_USES_UJT
LED_FLASHER_USES_UJT
A relaxation oscillator is used to flash an LED in the base circuit. C1 is charged slowly through R1 by the power source, then discharged periodically through R3 and the LED by the UJT. Flashing rate is determined by the supply voltage and by R1-C1's time constant.UJT = 2N4871