If will modify or regulate the speed in the rotation of the motor. Usual, we just enter the voltage and DC current source to the DC motor, Makes motor can be rotated. This is the Pulse width modulation of motor control using CD40106. #12 volt dc fancontrol seriesIC1: CD4011, Quad 2-Input NAND Buffered B Series Gateĭ3, D4: 0.75A 200V Diode, 1N4148 Second: Not gate Pulse width modulation motor control You have some skills to do about Electronics. In other detail, in my view you are smart. Look at below! It is a copper PCB layout and a Component layout. #12 volt dc fancontrol how toHow to buildĭo you want to build it? This circuit is a few parts. Therefore, hFE1 is usually greater than hFE2. Normally, transistors that endure the high current. Do not forget that the starting motor current is several times of no-load current. The choice of Q2 must correspond to the current of the motor as well. The transistor Q2 will pass the current directly. Using two transistors connected in a Darington pattern, it has a very high current gain. So we use a transistor to drive the current. Since the output of CMOS cannot drive the motor directly. The motor speed will be the highest.īut when the VR1 is high, the square signal width is low (Leaving more space). When the VR1 is adjusted to the lowest setting, it will cause the duty cycle to reach 100%. R2 determines the time for the output range to be 1.īoth R1 and VR1 will set the time of the output range to be 0.Īdjusting VR1 will change the duty cycle of pulse. It makes it possible to adjust the duty cycle unequally. And, both diodes D3 and D4 determine the direction of charge and discharge current of C2. The duty cycle is only 50% and is not customizable. If we use the only resistor like a basic circuit. Each will be set to the inverter gates and connected to the pulse oscillator.
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