Variable DC Power Supply using LM317

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Below is the circuit for variable dc power supply R1- 240 Ω R2- 5K VR R2 can be replaced by fixed value resistor for fixed power supply. Following formula can be used to calculate output voltage. Vo=1.25(1+R2/R1) Output voltage should be2 voltage greater than input. Parts for current setup  D1, D2 – 1N4001 C1-0.1 μ C2 – […]