The circuit operation principle of the device is shown in the following figure. Plug in the power plug CT, because the normally closed contact j1 of the relay J is closed, the lamp H is lit, and since the normally open contact j2 is in the off state, the 4 pin of the LSE outputs a low level, and the triode VT is guided at this time. through. After VT is turned on, relay J is energized, contact j1 is disconnected, H is extinguished, and contact j2 is closed, so LSE's 4 pin outputs high level at this time, transistor VT is cut off, relay J is released, contact j1 It is closed again, H is lit, and the contact j2 is turned off again, so that the cycle is repeated cyclically, causing the lamp H to blink.
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