The first thing you need to test is the battery and motor. Some masking tape or sticky Post-It note.For example, the Jameco Electronics SS-5GL2 (187733). Optional: Two single-pole (SP) snap-action switches as automatic limit stops.The Jameco Electronics SWM127 (567761) has screws and allows much higher current. The Jameco Electronics GTS164BLK (22841) subminiature switch is similar to the one in the example photos. These are sometimes labeled as “on-off-on” in catalogs. A double-pole, double-throw (DPDT) center-off toggle switch.You can use a higher voltage battery if the motor supports it and still turns slowly enough to observe. You can use different colors, but it will be more difficult to follow the photographs.Īlligator clips or IC clips can be used instead of wire, if you don’t have access to a soldering iron or want to experiment with switching wires around. White, black, yellow, and blue stranded copper wire.The slower the better, so that you can observe the direction of rotation. A small direct-current (DC) electric motor (such as from a toy).However, sometimes you want a very basic solution where a person can directly operate a motor with a flick of a switch.
Most of this website is devoted to active semiconductors and electronics controlling DC motors.įor example, many of the robots have microcontrollers that drive motor direction through a transistor H-bridge. Which flowing of current in this form causes the motor rotated in reverse direction.Simplest Method to Make a Motor Turn Off, Turn On, Go Forwards, and Go Backwards It makes them have the current flow through Q4 go to the negative of motor and through Q2-transistors to ground. Figure 7: The motor gets the current through Q4 and Q2. The Q4 and Q2 also work by they get current from the base. Then later as Figure 7, we change power supply-V1 point into B-point. Recommended: 555 PWM LED dimmer circuit diagram Reverse Rotate control using transistor and flow through Q3 to ground successfully. Because the electrical current flowing from Q1 into the positive of the motor. So, the motor will rotate on the forward direction. Figure 6: apply power into A-point, Q1 and Q3 work. In Figure 6 circuit, if we apply power to A-point.
Read Also: Many about transistor driver circuit s Bridge transistor Motor driverĪs Figure 5, we use the four transistors to connected into the H-bridge circuit. It causes the transistor running and the DC motor will rotate, too. When a base of transistors gets the current electricity. You see in Figure 4.įigure 4 Using the transistor as switches. We will try to use all the transistors as the switch. Figure 3: Both switch-S2 and S4 are closed, causes DC motor rotates back in counter-clockwise direction.īecause that current will flow through the negative of motor cause current reversed or Rotated back counter-clockwise direction.