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Homemade eight-block digital regulated power supply circuit

2014-11-25 01:00  
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Homemade eight-block digital regulated power supply circuit diagram
The circuit is divided into two parts, one part is the regulator circuit, the other part is a digital decoder circuit. Integrated regulator block is based on LM317 adjustable regulator to matched with the corresponding partial pressure resistor, then it can get eight blocks of voltage outputs. In order to reduce the power consumption of LM317, transformer uses the center tap. When the output voltage is below 9V, it uses 12V AC voltage; When the output voltage is above 12V, it uses 24V AC voltage, and the voltage is automatically switched by relay.