This project uses LM317 and LM337 to implement a linear DC regulated power supply with adjustable voltage output. The area of the board is 10cmX10cm. The on-board voltmeter allows users to directly observe the specific value of the output voltage. It is recommended to add a heat sink to the voltage stabilizing chip during production. The polar capacitor selected in this project has a withstand voltage value of 25V, which is barely usable (more than fifteen times the square root of two). The selected capacitor withstand voltage value should not be less than this value as much as possible, and around 50V is better.
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