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 DIY simple 12v led light

Friday, July 4th, 2014

A LED light bulb is being popularity more than a conventional light bulb. Because It has high efficiency, low power consumption and thus heat resistant. I buy the 12V LED Light Bulb as Figure 1 For use in cars And general use Figure 1 LED light bulb for Car. Then I tried to measure the […]


 Very simple preamplifiers using 2N3904

Thursday, July 3rd, 2014

Hi, Friends. Today I get email from Kunal Banerjee, send a preamplifier projects to published for all to see. It is very simple preamplifier circuit using one 2N3904 transistor only. Though very small, but it still have many useful. He say it low noise than normal IC circuits. and extremely low distortion. Frequency response: 20 […]


 My site is attacked

Thursday, July 3rd, 2014

Hi, Many Friends About a week ago, my site is slow so much that I can access and update the site. The admin said that DDOS attack of very severe until system can not. Now normally, However do not trust. For this reason, I have stopped updating this site. If normal really. I will come […]


 Simple 1.2V AA battery Solar charger circuit

Monday, June 30th, 2014

This is simple 1.2V AA battery Solar charger circuit. If you want to charge only one 1.5V AA battery and must used at outdoor that don’t has home electricity. We will also use fast it so we need to application devices near us. This projects is very easy and cheapest because we use a solar […]


 0-50V 3A Variable DC power supply

Thursday, June 26th, 2014

This regulator is circuit that adjust output voltage wide rage between 0-50V, and Also important is the overcurrent protection circuit at 3 Ampere. Which will immediately cut. The voltage regulation circuit because use IC-LM723 ICs will provide better performance. So is suitable as a power supply circuits for various experiments. Since we ever present a […]





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