Because the voltmeter used in education, and is a model which usually reads the analog value from such tools will have aberrations from the observer are approx 280-380 baht, which is relatively very high prices. Made with speculated that if has to create a voltmeter used in education by low cost and price, which is applied when you import any side. On one side, and then will make the value of a voltmeter used in education this has increased from the original value.From the relevant issues and research group, therefore, is thought to create a voltmeter that has been applied in the measurement of labor movement in the electric battery. By then, there was the low cost price. There is a small and effective by writing commands from the program into the circuit to make the display onto the screen, which LED in education is useful and can be custom fabricated is a device that has a low production cost, and easy to find materials. Use the funds to create the most appropriate and not to be used in scientific experiments ranging from education to elementary education, and precision machines, which generated Voltmeter is useful to the education budget, less because of the ability to alter and create your own. From easy to find materials.
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