The luminous flux test circuit with optical resistors

Published:2011/5/20 0:55:00 Author:Borg | Keyword: luminous flux, test circuit, optical resistors | From:SeekIC

This is a luminous flux test circuit with optical resistors. In the circuit, the optical resistor RG forms a bridge with RP1,RP2,R1 and R2; RP1 is used to adjust the balance of the bridge; RP2 is used to adjust the sensitivity of the circuit. If we adjust RP1 to make the voltages on a and c are equal, then VTl and VT2 stop, and the thyristor of VSI is off. In the meantime, if the resistance of RG changes, the bridge will be unbalanced, and a voltage will be generated among a-c, then VTI and VT2 are on, the thyristor of VSI is also on, the buzzer B will buzz to inform the luminous flux of the test.



Reprinted Url Of This Article:
http://www.seekic.com/circuit_diagram/Sensor_Circuit/The_luminous_flux_test_circuit_with_optical_resistors.html

Print this Page | Comments | Reading(3)