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Again this is how cars power drills and many other equipment work.
Dc motor forward reverse circuit. This circuit requires 6 components. In my case it was 2 aa batteries. The diode d1 protects the dc motor from the back emf effect hence there is no output load effect rise.
When the switch is thrown down the motor spins in the opposite direction. The dc motor is connected to the supply through dpdt double pole double through switch by changing the switch position we can get forward and reverse rotation from the dc motor because this switch interchanges power supply polarity applied to the dc motor. The relay used in this is a dual channel relay.
A power supply that suits the specs of the motor has the voltage and amperage as the manufacturer of the motor recommends. When it reaches the rightmost limit the drive motor reverses and brings the workpiece back to the leftmost position again and the process repeats. Dc motor forward reverse control working principle.
Preferably one with a center off position so you can control the motor like this. The npn transistor bd 139 drives the output from timer ic this output pulse duration decides the speed of dc motor by varying the. Two micro switches are used in which the motor is set to move in the forward direction if one switch is pressed and in the reverse direction when the other button is pressed.
Finally a simple circuit to control the direction of a dc motor. If your motor or battery isn t marked with a positive or negative just choose either terminal and mark it as such. The motor operates in the forward and reverse direction by making the coil in the relay energize and de energize.
The worst case is that the motor will go in the opposite direction than you expected. To make sure the motor turns temporarily connect the battery directly to the motor white wire from the positive end of the battery to the positive terminal of the motor black wire from the negative end of the battery to the negative terminal of the motor. I updated the description base on suggestions from frank.
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