LM 317 Calculator
Calculate LM317 Resistor Values
| This calculator is used to find the value of
the voltage adjustment resistor required to set the output of an
LM317 to a specified level. Typically R1 is 220 ohms or 240 ohms,
but it could be some other value. Check
the Data Sheet for more information regarding this. Select a
value for R2 and hit the Calculate button. The LM317 output value is
reported in volts.
Note: The input voltage to the LM317 must be at least 1.5v greater than the output voltage. Note2: You can get ridiculous values with the right combination of R1 and R2. Please note the actual capability of the device from the Data Sheet. LM317 Tutorial: http://www.netwak.com/electronics/lm317/tutorial.html |