Adjustable power supply is an indispensable tool for electronics enthusiasts. Currently, most DC adjustable power supplies use knobs to adjust the voltage, which has low adjustment accuracy and frequent jumps, making it inconvenient to use. This article will introduce the production of a liquid crystal display digital control voltage regulator. The power supply circuit is simple and easy to make. The output voltage (0-25V) is adjusted by the keyboard, with a step value of 0.1V and a current of up to 2.5A.
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