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One of the non-contact proximity switch circuits
Source: InternetPublisher:宋元浩 Keywords: Switch circuit proximity switch contactless diode Updated: 2021/12/10
It uses magnetic sensitive diodes as control components. A magnetic bridge is composed of four magnetic diodes .
Normally, the magnetic sensitive bridge is balanced, the transistor VT is cut off, and the relay KA is released. When the external force drives the small magnet close to the magnetic bridge,
VT is turned on and KA absorbs the table. The indicator light H lights up and turns on the control circuit or alarm circuit.
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