Author: Rend

This is a video of Santa alarm. This video shows how to make a alarm when the refrigerator’s door is opened. The requirement to make this alarm is a 9V battery, the reed switch, magnet, wire and buzzer. This buzzer will buzz when the magnet is taken away from the  reed switch. Here is the tutorial video: The red wire […]

This is a video of Holiday LED lights. This video shows how to make a holiday LED lights that is powered by battery. The battery that is used in in this video is a coin battery, standard CR232. The LED is a 5mm colored LED. The LED has two leg, the shorter leg is negative and the longer leg s […]

This is a video of 60 watt light bulb using LEDs. This video shows how to make a 60-Watt light bulb using LEDs. This video compares the efficiency of 60-watt light bulb with the ten LEDs. The 60 watt bulb has 800 luminance of light and the efficiency is about 40 luminance per watt. Then the five LED design using […]

This is a voltage regulation in automotive electronic system video. This video explains the solution of voltage regulation problems in automotive electronic system. The problem of the regulation in automotive electronic system is the the supply from the battery s not constant. One of solution to this problem is linear LDO voltage regulator. It can be used for applications where […]

This is inrush current in DC-DC converters video. This video explains how the DC-DC converter works. First, the video shows the diagram of DC-DC converter system. IN the diagram there are Vsource, Zsource, EMI filter, DC-DC converter and load. This video shows the graph diagram of the inrush current in DC-DC converter. Graph diagram shows Cin charging and Cout charging. […]

This is a voltage vs current mode control current sharing in a poly phase DC-DC converter video. This video explains the different of the voltage and current mode control in polyphase DC-DC converter. This video starts with explanation of the basic mode control. There are two stage in voltage mode control, buck power stage and voltage mode control stage. In […]

This is simple isolated power supply video. This video shows step by step how to design isolated power supply. The simple isolated power supply adalah flyback topology. This topology is chosen because it s safety, has a little noise and the unit production. This video focus on the flyback topology. In flyback topology, the transformer s used in two purpose,they […]