Here is a quick and dirty way of making a knob for a rotary encoder from old superglue bottle cap, empty dental floss spool, a few carefully bent pieces of transformer core. Not all of us have access to fancy CNC or 3D printing.
The knob is held together with a few drops of super glue. The metal center is assembled towards the far end. This along with the raised plastic bit in the center helps to reduce wobbling.
The knob is fiction fitted to the encoder. It works well enough in spite of my crude workmanship.
The encoder was supposed to come with the washer and nut, but they changed the SKU on me. Not going to argue and wait may be another 2 months.
They didn't leave much space for the usual standoff. There are much thinner ones from China, but I rolled up a couple of scrap transformer cores into tubes.
The encoder PCB was then mounted inside the bottom halve of an old dental floss case using two 4-40 0.75" screws and my make shift standoffs.
I made the mistake of lining up the PCB on the wrong side. Their mounting holes are not symmetrical. :( The center hole is drilled with a 0.25" dia drill bit.
Fitted with the knob.
I added 2 pairs of LED in series onto a couple of small perf boards which are hotglued in place.
They light up pretty well.
Here is a quick and dirty way of making a knob for a rotary encoder from old superglue bottle cap, empty dental floss spool, a few carefully bent pieces of transformer core. Not all of us have access to fancy CNC or 3D printing.
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