Taiss/Incremental Rotary Encoder DC 5-24v Wide Voltage Power Supply 6mm Shaft Optical AB 2 Phase Quadrature Encoder 600P/R

For those that need assistance here is what you need to know:1) they work best at 6v and up. This is only required to power the board and transmitting LEDs. If has nothing to do with the output. You can take apart and wire directly to the output of the 5v regulator and supply it 5V. But nothing lower.2) these are open collector NPN. This means the signal wire is connected to the collector of an NPN transistor. So you can use it with 3.3v, 5v, etc for control logic but you need to either tell your microcontroller to use a PULL UP resistor, or install your own pull up resistor that connects from the control voltage say 3.3V to the control/pulse wire. Then connect the grounds together and hook the control wire to the microcontroller input pin.I'm not certain the minimum voltage for the control transistor but I would guess anything over 1.5v would probably be fine.I use them on an esp32 and use the internal pull up on the input pins. The esp32 has a built-in counter up to 80Mhz that can be used for this purpose. These are smooth rotation, no exact stop points. So they work well for free spinning applications like motor control. They are not great for a knob because there are no detents. But if you wanted those there are other options. I put a pulley on it with GT2 belts to the wheels of my robot and they work perfect for that task.I hope this helps inform future customers.

If you are having problems using this at 5V, it's because there is a generic LM7805 as a regulator for the internal power supply. The regulator will be in drop out unless you give it around 7V. This should be rated for 7V-24V. They are not suitable for 5V operation. The outputs are also open collector so you will need pullups to your desired logic level to get signals out of these. Attached are some pictures of the nice internal construction and the quadrature output signal.

Just as others said rewire the internals to bypass the regulator if powering from a regulated 5v supply. Mine actually worked fine without the rewire at room temps but when I used it outside on a cold day it dropped below the cutoff and no output. Quick rewire of the red power lead to the output of the onboard regulator and back in business.

I heavily modified an old Ten Tec Argosy ham radio transceiver and this was perfect for the job. Slick as snot on a doorknob! VERY easy to turn so probably not good for mobile appllcations but other than that, just the ticket.

I usually don't write product reviews, but this encoder works and it works well. I used it with the hardware quadrature decoder on the Arduino Due and even at 1000 RPM, it does not skip a pulse. I bought the 600p/r version and was under the impression that it was total quadrature rising/falling edges, but it turned out to just be the rising/falling edges of a single phase. This means that the resolution is actually 2400 total rising and falling edges pulses per revolution.

I use this is a commercial application with a 65mm wheel and arduino mega. The wheel has literally rode over 20 miles of product and the rotary encoder is still reading very accurately.

As others have said, this needs more than 5V for stability and has open collector outputs. If you rewire power to the output of the regulator instead of the input, and move the outputs to these handy through holes on one side, you'll get 0 to about 2.6 volts on the outputs, which works nicely with my microcontroller without pullups.

Amazon always pounces on me to provide a review less than 24 hours after I receive a given item. So I'm giving half a review, which reflects the fact that I've only had time to evaluate half of my experience. Delivery was very quick! Build quality *APPEARS* to be good. Very good in fact, given this encoder's very reasonable price.But beyond that, I can't say much further. This unit came with no instructions and no technical data to answer any of my questions (such as maximum RPM, operating conditions, etc.). And I couldn't find this information about this encoder online.I'm still a long way from being able to try/use this encoder in a real project.I have high hopes for this encoder. But I can't give any hardcore information because it didn't include any useful