Proximity Switch Circuit Composed Of Integrated Magnetic Sensor HMC1001

Published:2011/7/7 6:52:00 Author:Robert | Keyword: Proximity, Switch, Integrated, Magnetic Sensor | From:SeekIC

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 flip the comparator and then it outputs low voltage level to make LED light. If remove the magnet the comparator would output high voltage level to stop LED lighting. Obviously, the circuit is equivalent to the proximity switch with indicating light. It can be used for detecting displacement, rotating speed and other non-electricity parameter. By adjusting R1's resistance value it can set the switch's threshold voltage.



Reprinted Url Of This Article:
http://www.seekic.com/circuit_diagram/Control_Circuit/Switch_Control/Proximity_Switch_Circuit_Composed_Of_Integrated_Magnetic_Sensor_HMC1001.html

Print this Page | Comments | Reading(3)