Here's the circuit that I tried assembling:
Regulated Power Supply, Variable
I removed the last node consisting of R3 P2 and the V. I guessed I could make the circuit work without them.
This is my first time using the LM317 IC so I really don't know how it works. After completing the circuit, I tested the output voltage several times and it worked fine. The output was 1.2-32v. I tested it on my 12v 500mA mini-drill. I set the voltage to 12v using my multimeter and connected the drill. It worked but I noticed the reading on my multimeter jumped from 12v to 16v. I quickly turned off the circuit, afraid that my drill would be toasted. After that, I again tested the circuit without any load. Mysteriously, the output changed its range from 1.2-32v to 16v-32v. Tested it several times. Same thing happens. Tried changing my pot. Same thing.
What could be the problem? Please help.
I'm kinda new here. Please forgive me if violated any rules.
Regulated Power Supply, Variable
I removed the last node consisting of R3 P2 and the V. I guessed I could make the circuit work without them.
This is my first time using the LM317 IC so I really don't know how it works. After completing the circuit, I tested the output voltage several times and it worked fine. The output was 1.2-32v. I tested it on my 12v 500mA mini-drill. I set the voltage to 12v using my multimeter and connected the drill. It worked but I noticed the reading on my multimeter jumped from 12v to 16v. I quickly turned off the circuit, afraid that my drill would be toasted. After that, I again tested the circuit without any load. Mysteriously, the output changed its range from 1.2-32v to 16v-32v. Tested it several times. Same thing happens. Tried changing my pot. Same thing.
What could be the problem? Please help.
I'm kinda new here. Please forgive me if violated any rules.