Automobile lamp turn-off forgetting alarm apparatus based on light beam excitation circuit and logic protection circuit
A light beam excitation and logic protection technology, applied in the field of alarms, can solve the problems of exhaustion of vehicle battery power, inability to restart the engine, and shorten battery life, etc., to achieve easy production and use, easy installation and portability, and extended use The effect of longevity
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[0017] Such as figure 1 As shown, the present invention mainly consists of the audio HA, the control circuit connected with the audio HA, the photoresistor RL connected with the control circuit, the beam excitation logic amplifier circuit connected with the control circuit, and the beam excitation circuit connected in series. It consists of a logic protection emitter coupling amplifier circuit between the logic amplifier circuit and the audio HA. Among them, the audio HA is preferably realized by YMD-12095 miniature DC audio with its own sound source, and the photoresistor RL is preferably realized by MG44-03 plastic resin package photoresistor.
[0018] The control circuit is the core point of the present invention, which includes a triode Q1, a triode Q2, a resistor R1, a resistor R2, a resistor R3, a resistor R4 and a diode array group. Among them, the resistance value of the resistor R1 is 70KΩ, one end of which is connected to the base of the triode Q1, and the other end...
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