Das Szenario
A hobbyist builds an adjustable bench power supply using an LM317 with a current limiting transistor to safely power prototypes.
Was diese Zeichnung zeigt
Die dahinterstehenden Entscheidungen verstehen.
01
Choose Rsense (0.2Ω) to set current limit to approximately 3A (0.6V Vbe drop)
02
Use a 5kΩ potentiometer for R2 to enable voltage adjustment from 1.2V to 25V
03
Include protection diodes D5 and D6 to prevent capacitor discharge through the regulator
Suitable for low-power lab supplies where adjustable voltage and current limiting are required for safe testing.