Here is a simple DC electric motor variable speed controller circuit that can be configured to control the sweep rate of automobiles’ windscreen wipers. The circuit comprises a timer NE555 (IC1), ...

The DC MOTOR SPEED CONTROL circuit is primarily a 555 IC based PWM (Pulse Width Modulation) circuit developed to get variable voltage over constant voltage. The method of PWM is explained here.

The schematic diagram shown in Figure 2 illustrates how L298 H-bridge IC can be connected with Arduino to control two DC motors. Two sets of inputs, one for each motor, are provided to control its ...

Fig. 3: Equivalent wiring diagram of a DC motor. In a DC motor, magnetic flux is generated by the windings located on the stator. Let’s suppose that the stator has only one polar termination, ...

DC series motor has been the most used solution for the traction of locomotives, trolleybuses, trams and others, characterized by a speed and torque control using additional resistances, which means a ...

The current limit circuit (see diagram) compares this voltage to an adjustable negative voltage using an op-amp wired as a comparator – unlike many op-amps, LM324 op-amps can be used as comparators ...

This project describes how a DC motor can be moved in forward or reverse direction using a TV or DVD remote control. The goal is to construct a simple bidirectional motor driver that uses modulated ...

Circuit Explanation: As said earlier, we cannot draw more than 15mA from any GPIO pins and DC motor draws more than 15mA, so the PWM generated by Raspberry Pi cannot be fed to the DC motor directly.

The trick, apparently, is to measure the internal dc resistance of the motor – ether with an ohm meter, or though applying a low voltage to the motor, stalling it, then measuring the current. Add a ...