In this project is to design the machine pay DC voltage (DC Power supply), which is a device that serves as current and voltage to adapt to various types of electronic device to work.The main circuit consists of three sections, rectifier filter circuit, and voltage adjustment circuit constant. Which also changed voltage alternating current size 220 V. A voltage system need can pay electricity is the most 1A.2 solution as follows:
.Exit 1 can adjust the pressure from 1.2-20V and constant pressure to choose, and 3.3V 5.0V 12V
exit 2 pressure adjustable since. 1.2-2.0V
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