DC motor servo circuit composed of μA741

Published:2011/7/4 19:10:00 Author:Lucas | Keyword: DC motor, servo circuit | From:SeekIC

In the circuit, R1 and R2 is to limit all power supply voltage to add on the bridge, and thus change the size of the input signal. RP1 is used for the location set, but the servo motor position is mainly depends on the another voltage signal. At this time, if Al's inverting input end is applied voltage signal, the servo finally steady state is to make the potential of RP2 and the input signal of inverting input end be the same. The bases of VTl and VT2 power transistors are connected with diodes VD3 and VD4 to skillfully applied bias.



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