Month: April 2010

This is a PCB trace repairing tutorial video. This video talks about how to repair a PCB trace. To repair the PCB trace we can use the conductive pen. First we must shake the conductive pen for 20 second before using it. Then repair the PCB trace. And then we must wait about 24 minutes. The PCB trace has been […]

This is a video tutorial of brushed DC motor basic part 2. This video talks about types of the brushed DC motor. There are four types of the brushed DC motor, they are permanent magnet, shunt-wound, series-wound, and compound-wound. In this video, the advantages and disadvantages are explained in detail. This video also describes the performance comparison of the four […]

This is a video tutorial of Brushed DC Motor Basic Part 1. This video talks about the basic of Brushed DC Motor and principles of operation of four types of Brushed DC Motor. Brushed DC Motor is consist of Stator, rotor, brushes and commutator. The stator is used to generate a stationary magnetic field that surrounds the rotor. The principles […]

This is a PWM video tutorial. This video talks about the PWM and how to use it. The PWM can be used  to dim the LEDs or control DC motor speed. By changing the width of the pulse, we change the average voltage. Usually, to generate the PWM we use the function generator. However we can build a simple PWM […]

This is a video tutorial of DC motor control. This video shows how to control the DC motor speed. In this video, speed of the DC motor is controlled by changing the power supply. Increasing speed can be done by increasing the voltage, and decreasing the voltage will decrease the speed of DC motor. Here is the video : To […]

This is a video of wiring 555 IC for PWM. The video shows how to wire the 555 chip for PWM. The pin 1 is connected to ground. pin number 2 is connected to pin number 6. Next, pin number 3 connected to the output. pin number 4 is connected to VCC. Pin number 6 is connected to 7 and […]