Position: Index > Electrical Circuit >

Blind electronic compass circuit

2014-11-08 05:35  
Declaration:We aim to transmit more information by carrying articles . We will delete it soon, if we are involved in the problems of article content ,copyright or other problems.


Blind electronic compass circuit
The core device IC1 of electronic compass is a piece of hall-effect integration sensor UGN-3501M, its internal structure includes a hall unit and a linear differential amplifier with differential emitter-follower output. The circuit principle is shown in the diagram: the integrated hall sensor IC1 changes the earth's magnetic field to differential output voltage; this voltagepasses IC1's two output ends pin 8 adn pin 1 and resistors R1 and R2,then it is added toanother difference amplifier IC2 ( μA741) . When IC1 output is zero,RP is used to adjust the output voltage of IC2; capacitor C1 isused to suppress parasitic oscillation. R8, C2 , and VD (1N4148)are thecharge and discharge devices of time-base circuit.