Category: Video Tutorial

Below is video tutorial about closed loop PWM PC fan controller. Unlike the other controller, in this circuit the potentiometer would not directly changes the duty cycle instead it set an RPM reference value. On the first state is to read the potentiometer value and to translate it to RPM value using Analog Digital Converter then it read the current […]

Below is video tutorial about PWM RPM DC fan regulator with feedback. The fan speed rotation can decrease if the filter is filled with dirt and to much dust on the fin. On this video explained that we can changed the speed of the fan with changed the cable position on the IC. If the cable is on the no […]

Below is video tutorial about PWM fan controller with pulse stretching method to get RPM feedback. On this video explained there are three channel on the oscilloscope. The yellow channel is directly connected to gate of the Mosfet. The green channel is the feedback of the fan. Finally, the blue channel. Whenever the blue channel is high, the peak get […]

Below is video tutorial about voltage controlled PWM generator. This circuit consist of an electronics component such as potentiometer, capacitor, triangular wave generator, and comparator. The reference DC voltage can be changed using the potentiometer. On the oscilloscope is shown a triangular wave (green line), square wave (yellow line), and the blue line is the DC voltage reference. Watch the […]

This is RTD transmitter calibration video. This video show step by step how to calibrate the RTD transmitter. To calibrate the RTD transmitter the fluke 744 can be used. First Connect the RTD transmitter with the fluke 744. This connection need three wires, but the fluke doesn’t has three connection. So we use the jumper. Here is the tutorial video: […]

This is differential pressure transmitter response video. This video demonstrate the different of pressure transmitter response on low and high ports. The pressure transmitter is connected with the battery circuit and the voltmeter is connected in parallel to two hundred fifty ohm resistor. The pressure transmitter has two ports they are high pressure port and low pressure port. First, this […]

This is a 4-20mA loop regulation video. This video demonstrate the 4-20mA loop regulation video. In this video, the current is depending only on the pressure that trough the regulation circuit. When there is no pressure, the current still zero, and then when the pressure is applied the current will increase up to 12mA. This current does not depend on […]