Pulse width modulation PWM with op-amp

310

05:12:09

To control the speed of motor 
And also using as a a dimmer 

published 10 years ago

hamilton1300

10 years ago

You can remove the bottom DC power source by correcting one side of the voltage divider to ground and the other to the positive side of the top DC power supply. You should also consider driving a MOSfet with this to control a motor, I don't beehive you'll find an OP amp that will be able to manage that much current. You could also take advantage of an H bridge and the negative swing of the OP amp to drive the motor forward and reverse.

hamilton1300

10 years ago

Believe not beehive, stupid auto correct!!!!!! :-)

MohamedDoba

10 years ago

The bottom dc battery is to make the duty achieve less than 50%

MohamedDoba

10 years ago

The op amp will use a BJT as switch .. so it is not connected directly to motor .. so no need for op amp with high current. Because it will not drive the load it will just use as control unit in the base of BJT

MohamedDoba

10 years ago

A nice a diea to use h bridge with op amp to drive the motor in the two direction .. i will try to do it . Thank you "-"

hamilton1300

10 years ago

I used an H bridge on a couple of my projects, on of the best was on a solar tracker.

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