Multiturn Trimpot Knob
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Trimpot knob to adjust trimpot without any tool.
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Model information
- Source
- Printables
- Category
- Tools
- License
- Creative Commons — Attribution — Noncommercial
Multiturn Trimpot Knob
This is my first model, I've created it on FreeCAD.
Back story:
I am making a Bench Power Suply with a 300w Buck converter I had laying around. Problem was it has small trimpots for adjusting Voltage and Amps. These are tricky to adjust by hand, you'll need a small screwdriver to do so.
So I looked online and big Trimpots are very expensive. I searched the internet for somthing that can be attached to small trimpots and somehow make it big enough to be able to adjust by hand without any tool. I coudn't find anything, so I spend a whole day just to make these.
These are not perfect as I am very new to 3D printing. But It got the Job done.
I am attaching a YouTube video link, its not about this knob, but how to modify an ordinary single turn knob to a multi turn one. WATCH IT. and you will understand how to prepare this after printing.
Basically you will have to place a thin(~.5mm) and very small piece (about 2mm x 1.5mm) of tin or plastic sheet (check, it sould be able to turn the small screw of trimpot). Insert the sheet into knob inner slotted part and test it.
I have also added FreeCAD file, if you want to modify it.
Hopefully I will create a Video about how to do it step by step. Till then Have fun!
Just for Reference: