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Recent New Posts


 The old pc power supply circuit

Monday, September 3rd, 2012

A good DC switching power supply circuit form old computer that not used. It has used powerful, durable and works great. Present, a computer become the electric appliance power needed for every home Because there are very useful. But lifetime limit and out of date very quickly. There are new program. Desired machine that has […]


 2 channel 100W min AF Power Amplifier (Dual Supplies) STK4231II

Sunday, September 2nd, 2012

If you want to create the 100 watt OCL audio amplifier circuit. I want you to consider this circuit as one. It uses STK4231 IC products to create a simple, small and best economical. How it works. The STK4231 is Hybrid IC of Sanyo, in the family of STK4201II. Can provide a high power output […]


 Infrared Remote control transmitters

Saturday, September 1st, 2012

This is Infrared Remote control transmitter circuit has high performance and can be applied to works with the various infrared receiver circuit. To made easily. And best to save your money. I need not tell you much, what is the infra red remote control. Because you have known as well. so I recommend circuits 2 […]


 Flyback transformer tester circuit using 2SC828

Sunday, August 26th, 2012

The circuit tests a flyback transformer of the televisions that the result is a simple, easy and cheap to build. One of my friends is TV repairman colors – black and white. He said the repairing on the fly back is very difficult. Because it has large size, Is high voltage source. So is very […]


 Crystal tester circuits using BC107

Thursday, August 23rd, 2012

You cannot use a multimeter to check a crystal. You should have a this circuit, because it can check a crystal 100Khz to 900Mhz, easily to make and cheap.The crystal is a key equipment used to generate a radio frequency. – Some circuits use a clock signal controller. For example, The digital circuits of computer […]





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