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The blind source device (LM567 and KD56022) (1)

2015-01-05 20:44  
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The blind source device (LM567 and KD56022) (1)
The blind always takes a stick to help them avoid obstacles when they are out of homes. As the stick can't be too long, the distance is limited. By installing a micro ultrasonic probe in the stick, not only the probing efficiency and distance can be raised, but also it's convenient to use. In the figure is the blind source device of ultrasonic probe, whose circuit is shown there. The circuit consists of the ultrasonic emitter, ultrasonic receiver and signal voltage amplifier, ultrasonic detection circuit and alarm sound circuit.