R1 Ohm

R2 Ohm

Output voltage (V)

This calculator is used to find out the resistance value of the LM317 to adjust the voltage you need. The typical R1 value is 220 ohms or 240 ohms, but it can also be changed to other values, such as 150 or 470 ohms. Then enter the value of R2 and click the "Calculate" button to immediately calculate the output voltage of the LM317.
Tip: The input voltage of the LM317 must be at least greater than the output voltage of 1.5V.
Note (three "most" reminders):
Maximum output current: 1.5A
Maximum operating temperature: 125 ° C
Maximum input and output voltage difference: 38V