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Teardown of a cheap rotary encoder

with 2 comments

For my humidor controller project I recently ordered cheap Chinese rotary encoders via eBay. Before I used the Noble RE0124PVB17, but they were out of stock just as I needed more. As I didn’t want to spend much more than 50ct per piece I had to turn eBay for cheap Chinese parts. I paid 6,88 € for 10 pcs incl. shipping and ordered two bags. The parts arrived just eight days later, which is phenomenal considering that they were sent from China.
Quality-wise these parts are not on par with the ones from Noble or Alps. The push-button is ok, but I don’t like how they turn. The detents feel rather unprecise and wiggly. However, they seem to work and the inner construction is reasonable. I added some pictures of a unit I tore down. Future will tell if they can stand the expected usage.

Written by Ferdinand

September 5th, 2012 at 19:00

2 Responses to 'Teardown of a cheap rotary encoder'

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  1. Hi,
    are you taking about KY-040 ?
    How do you see if the push button was pressed or not? can’t see anything on A or B (CLK / DT nor SW)

    yatko

    20 Aug 13 at 23:26

  2. never mind, found it, SW is GND’ed so it needs to be pulled up.

    yatko

    21 Aug 13 at 05:29

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