Description: An adjustable potentiometer can open up many interesting user interfaces. Turn the pot and the resistance changes. Connect VCC to an outer pin, GND to the other, and the center pin will have a voltage that varies from 0 to VCC depending on the rotation of the pot. Hook the center pin to an ADC on a microcontroller and get a variable input from the user!
This pot has a ¼" mounting diameter and has a 10K linear taper. Check the datasheet for dimensional drawings.
Based on 7 ratings:
3 of 4 found this helpful:
I haven’t tested it electronically yet, but just FYI for anybody out there drilling holes to mount these things, they won’t actually fit in a ¼" hole!! I found this out after drilling ¼" holes through ¼" acrylic. The posts wouldn’t fit, and so, busting out my trusty micrometer, I measured the threads and, much to my surprise, the major diameter on the threads is actually around .265", not .250"!! This may not matter if you’re going through 1/32"-1/16" material, but this makes a difference on thicker materials. I’d recommend an 17/64" or 9/32" drill for mounting holes.
Bought this to use with the LM317 and made an adjustable bench supply from an old ATX PSU. Movement is smooth, mounts easily, and the matching silver knob looks awesome on it.
Perfect replacement pots or for use in new projects. Well built and small enough for cramped project boxes. Nice smooth operation and at a reasonable cost.
I am a great fan of Sparkfun, and love their stuff - for my lab, an advantage over places like Digikey is that you don’t have to wade through 100,000 exotic options to find a reasonable item for a regular shop. I also like cheap and easy. This is not the place for getting milspec parts for your next deep space probe. But. I have had a LOT of problems with these. The can be flakey, and flakey is the hardest thing to debug. Jameco has some slightly bigger ones for like $1.50 or so. Maybe I just got a bad batch, but I would avoid.
Don’t know if they test these before shipping, but out of the 16 I’ve tried so far from an order of 36, 1 is already a dud. Also don’t buy in bulk – they just throw them all in a single ziplock bag so a lot of the pins managed to get bent way out of shape during shipping. I mean it’s easy enough to bend them back, but it’s still uncool.
and a really nice consistent friction. Screw threads are adequate, nothing super high quality.