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 Automatic LED solar light 2 by chayapol

Tuesday, May 26th, 2015

Chayapol and I build the Automatic LED solar Light is version 2. It has a higher performance, is brighter as Figure 1 compares the version 1 (left) and the version 2 (right). Because we use LED grow larger, but use a 12V battery as the original. Figure 1 DC current measurement techniques My son want […]


 Super solar 3W LED light by Chayapol

Tuesday, May 19th, 2015

Chayapol need lighting around the house at night. But that point is no AC lines, it’s hard wiring. We happen to have the 12V battery, LED lamps and Solar cell. Thus was born the idea to create the super solar 3w LED light. It saves electricity costs. The LED lamp will light up the night […]


 Make children table for modeling clay

Sunday, May 17th, 2015

Chayapol want to build a table for younger sister to using a modeling clay. We are very fortunate to be able to buy wood chips easily and cheaply. Chayapol as homeschool boy loved so much artificial wood. But we are not the professional woodworking. It may be a process that is not complete. And the […]


 Hi-Fi preamplifier with tone controls project circuit

Friday, May 15th, 2015

The circuit features tune smooth bass, and treble is not spicy, with a very low distortion. Please below : more Features -Use low noise transistors -Frequency response range : 20Hz-20KHz -Total Harmonic Distortion Noise 0.001% at frequencies 20Hz-20KHz -Maximum output voltage 14Vrms at frequencies 20Hz-20KHz -Input sensitivity is 50mV -The increase / decrease rate of […]


 My son use Portable Electronic scale for recycling

Thursday, May 14th, 2015

Weight Pocket Hook Scale I will teach my children to be aware of Recycling is important, We will collect all the cardboard. To sell as his pocket money. Every time I teach it to save weight with a weight pocket hook scale. The plus numbers, the decimal point, the unit of weight materials as homeschooling […]



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