Test - lowercase jpg

Kaixin micro test

Test probe P100-M3

SCR fast test instrument circuit

The pulse signal generator is a multivibrator composed of a time base circuit 555 and R1, R2, C, etc., and its oscillation frequency is f=1.44/(R1+2R2)C. The oscillating frequency corresponding to the illustrated parameters is approximately 1 Hz. Since R1< Insert the thyristor SCR. When the button AN is pressed, when the 555 outputs a high level, the LED, the resistor R4, the thyristor SCR, and the transistor BG2 form a closed loop, and the LED 11 emits light; when the 555 outputs a low level LED2, R4, SCR, BG1 form a closed loop, and LED 2 emits light, indicating that the thyristor is good.
After inserting the thyristor SCR during the test, the LEDs LED1 and LED2 should not be lit, otherwise the two poles of T1 and T2 are shorted.

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