Proximity Switch Circuit Composed Of Integrated Magnetic Sensor HMC1001

The picture shows the proximity switch circuit composed of the HMC1001 and operational amplifier (AMP04) and light emitting diode (LED). The operational amplifier is used as a comparator here. If taking a magnet with length about 6mm~12mm to close to the HMC1001, when it moves to a certain position, the MR electric bridge`s output voltage would be 30mV to..

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