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Checked all 5 on the scope. They all worked reliably down to 1.2V. (The product description says 5V), my projects usually run at 3.3V or 2.2V for NiMH battery powered. There is no ringing or glitching on the Clock, Data, or Button Data signals. (No need to de-bounce or worry about false data). My Fluke couldn't read any idle current, so it is less than 10uA. All lines are normally high. Pressing the button does not change the Clock or Data lines. Data is valid on Falling or Rising edge of the clock. Although, the data line is stable for a longer period of time when using the falling edge of the clock. There is one clock pule per indent on the shaft. Turning Clock-Wise. and using the falling edge, data is high. Turning Counter Clock-Wise. and using the falling edge, data is low. (Data level is reversed if you are using the rising edge of the clock. So, this is perfect for any project running from 2.2V to 5V. I am exceptionally happy with this product!
So, these little encoders are exactly what I needed and such a great price. Shipping was fast as always and items arrived a day ahead of schedule. Additionally, reading other reviews here on Amazon, I had expected to have to find a source for the retaining nuts, but I was pleasantly surprised to find a small bag with 5 washers and nuts included with the encoders. Perfect! The knobs that come with seem a bit small at first, but they will fit. Not sure why they have pointer on them, as these are continuous rotation encoders, but can't they look nice so can't complain.
nice encoders. They have the pull-up or down resistors on the board. The connector is a .1 inch (2.54mm) pitch so will fit cables or will plug into a socket on a PCB. They come with a knob and a knut for the encoder shaft. The knob has a flat on one side that matches the one on the shaft and fits tight. Ther is no grub screw or hole for one. I am not too sure how well that would last with heavy use, seems fragile to me. However, in my opinion, they are a very good value for the money. James Cullins
It's a really good device, works as expected. It's logic is pretty simple: when CLK signal falls down, check the state of DT: if it's also "0" (zero) then it's a clock-wise rotation, if it's "1" - you're rotating counter-clock-wise. And of course you need some logic for de-bouncing.
I like that you can turn AND use them as buttons. EASY TO HOOK UP AND PROGRAM, especially with Arduino.
Comments I've had from others, though, have been that the caps had a mark on them, but they are ROTARY ENCODERS - they continue to turn, so the mark on them starts to seem unneeded. If they were potentiometers with limits, it would make more sense. Because these don't stop, I had to program them to recognize when they hit the limit, even if it spins around multiple times.
These switches do have a 'click' or 'select' when you press in on the knob. Each encoder comes in it's own bag with washer and hex nut for panel mounting as well as a pretty nice black knob. Easy to interface with Arduino and write your own custom menu that can be navigated using only the knob. Just put a 'back' button at the top or bottom of every menu.
I've purchased about 5 different types of rotary encoders recently, looking for quality and accuracy. Not all brands are created equal. These worked flawlessly, no crosstalk and, they come with nice encoder caps. Very happy with the price and value of this purchase.
I just wanted to say that these are exactly as pictured. Which isn't always the case when ordering KY-040 units e.g. other suppliers picture the threaded version, but ship the unthreaded version. I need the threads (wood enclosure), and these have threads.