I got this buck converter from Aliexpress that comes with a potentiometer to adjust.
However the potentiometer is a little too easy to rotate and I only want 5v out from this device, for led's and arduino.
The potentiometer somehow has 4 wires coming in instead of 3.
And if I unplug the potentiometer from the connector somehow the device doesn't work. Is there a way to adjust out power with this potentiometer and then disable it? I wasnt sure which wires i could cut so i thought its better to ask here.
Replace the pot by an equivalent resistor so that you get 5v or just poor hot glue on the pot once set at the right value so that it’s no longer easy to change
Hi,
I think you will find that the "pot" is more then just a "pot".
It has a switch built in as well, that is so you don't damage anything if it becomes unplugged.
Use a DMM to find what each of the four wires do, look at the back of the "Switch Potentiometer" and see if it has some pin labels.
Does the Switch Pot have a part number?
If so Google it and find out what its connections are.
You can buy locking fittings for the pot to stop it rotating , or as said figure out the wiring and use fixed resistors or maybe just buy one with a fixed 5v output
Its probably wired with a safety cutout so that a single wire failure doesn't send the motor out of control (which can be a real hazard if you think about it).
You'll probably have to reverse engineer the connections if you want to hard-wire a resistive divider.
