This is the other thread:
https://www.electro-tech-online.com/threads/power-supply.91484/
The datasheet says that R2 can be 240R. I thought this could be changed (to change the ratio of R1 and VR1). I'll change it back to 240R
I'll change the resistors and caps at some point and see how that goes.
If the regulator overheats, will it start again as soon as the excess load has been removed? I'll put on a good heatsink and see how that goes too.
I'm not sure what the current rating of the motor is, but it's only small, so it wouldn't be 1A. It does run from a 9V battery, so it can't be too high.
I did find that if I turned the voltage up, R2 would burn out. It's power rating must be too low.
If P=IV, and the circuit can provide up to 1A at a max of 27V, does that mean the resistor must be 27W? That sounds really huge... Have I got that wrong?