Questions tagged [rotary]

Characterized by circular movement around an axis, as opposed to linear movement along a line.

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3 answers
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wire rotary switch with leds that turn one at a time

I have a 9V battery, a rotary switch (one pole, 5 positions), and yellow LEDs (2V drop). How can I wire it so that as I rotate the switch the LEDs turn and stay on until I reach the end of the switch? ...
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3 votes
4 answers
477 views

How do I clean a badly corroded, jammed rotary switch with 12 position and 4 decks?

The 12-position 4-decked rotary switch on this Roland Re-201 dating back to the '70s or the '80s is completely stuck and won't move at all due to corrosion. The wafers on it's decks seem phenolic. The ...
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Power supply to a sensor to be mounted on a shaft rotating at >1000 RPM

My project involves mounting an ultrasonic transducer on a shaft rotating at >1000 RPM. What possibilities exist to supply power to the transducer? I cannot use slip rings because slip rings need ...
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57 views

Strange quadrature encoder signal

I have an inexpensive 600 PPR rotary encoder, like these ones found on Amazon. It is powered by a 5V pin of an Arduino Uno. I was unable to detect any rising edges on the signal pins and they never ...
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1 answer
152 views

Rotary switch to momentary switch

I have a rotary step switch (something like that: https://www.tti.com/content/ttiinc/en/apps/part-detail.html?mfrShortname=C/K&partsNumber=A20615RNCQ&customerPartNumber=&minQty=1&...
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2 votes
2 answers
202 views

Hardware filter for a rotary encoder using a resistor between pullup resistor and debouncing capacitor?

I want to implement a debouncing filter for this rotary encoder. I understand the use of the pull up resistor (avoid floating state) and the capacitor (debounce the mechanical switch). However, I can'...
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1 answer
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Rotary Potentiometer Switch Options

I'm looking for a rotary potentiometer that comes with a momentary push switch. I came across this Bourns PTR90 potentiometer with rotary switch and I'm wondering how does the rotary switch works? It ...
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0 answers
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Do rotary encoders really have no bounce?

I've always needed to add debouncing code, when handling switch inputs on microcontrollers. While I've only used three different types of switch, they all needed debouncing. My (two) rotary encoders ...
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1 vote
3 answers
193 views

Question based on rotary potentiometer and resolution

Can anyone help me how to come up with this question's solution? Question: A rotary potentiometer consists of a fine wire wound on a circular former, whose inner diameter is 2.5 cm. The resolution in ...
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2 votes
0 answers
34 views

Three-phase rotary converter wiring questions

I am installing a 30 HP three-phase rotary converter on a 200 amp service in my home shop. I intend to run a CNC milling machine with a 15 HP motor. I am using 2 AWG wiring in 1" shielded conduit ...
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1 answer
58 views

How does a "pulse dialer" (e.g. IN9151) internally work?

I'm wondering how a so called "pulse dialer" like the IN9151 (https://www.digchip.com/datasheets/parts/datasheet/237/IL9151-3N-pdf.php) internally works, meaning how it is achieved to ...
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1 answer
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Rotary encoder Grayhill SERIES 26 pinout

I can't figure out how this rotary encoder works. What's the Vcc and GND? The technical sheet is attached here but it does not say anything about how to wire it http://www.grayhill.com/assets/1/7/...
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1 vote
0 answers
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Why does a rotating magnetic field's frequency decrease, if we increase number of poles (induction motor)?

I absolutely don't understand it and drives me crazy. I've found several sources, in which there are shown images and animations about how two or three phase electric current generate rotating ...
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3 votes
1 answer
320 views

Motorized rotary switch

Motorized potentiometers are easy to find and often used e.g. in music studio equipment, but I could need a similarly motorized rotary switch for a project. I am either searching for the wrong term (...
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1 answer
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KY040 rotary encoder weird waveform

Edit: Figured it out. I posted answer. I have a KY040 rotary encoder hooked up to a 5V source, and the oscilloscope hooked up to the CLK output. When I turn the encoder, CLK goes low as you can see ...
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1 vote
1 answer
85 views

Reading a rotary encoder using a microcontroller and converting to Serial TTL?

I have an incremental rotary encoder (Bournes-EMS22Q) that I would like to have available on a wired network via RJ45 or via serial TTL (we have a serial-to-ethernet converter we can use Netburner ...
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1 answer
142 views

Detecting rotation from a fixed sensor

I am looking for a way how to detect the rotation of an object that is hanging from ceiling, attached with a rope. Since the object can freely rotate for many revolutions (until the rope is too ...
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1 answer
2k views

Stepper motor resolution calculation

I am not familiar on how to calculate the stepper motor resolution to operate with multi-turn absolute rotary encoder. Stepper motor details as follows, Total step - 600; speed - 160 pps; Motor type ...
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1 answer
475 views

Rotary potentiometer angle to voltage relation

I have a 10k rotary potentiometer which turns from 0° to 270°. I wire it to an Arduino with the middle pin (2) connected to an analog input (A0) and the other two pins (1 and 3) connected to 5V and ...
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1 vote
3 answers
235 views

Determine angular position from two potentiometers

I am trying to generate a continuous angle based on the output of the two potentiometers that are inside my device. The pots are shifted by 180 degrees and are capable of spinning continuously. How ...
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1 vote
1 answer
160 views

Scrolling wheel encoder with button push button action into wheel axis

I am looking for a wheel that you can push into as a button as well as scroll indefinitely in either direction. Here's the exact part I am talking about. I'm not sure exactly what it is called. The ...
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2 votes
1 answer
237 views

Help identifying pins in EVQV9C00116E rotary encoder

I'm trying to make a button box for a sim racing rig and need a few rotary encoders for menu browsing. I plan to connect it to an arduino but I can't seem to figure out how to wire things up. I have ...
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2 answers
155 views

Invert or turn Aux Signal mono using Rotary Switch

Is it possible to use a 3 Pole 4 Position rotary Switch to do the following on the respective positions: Send the Aux signal through normally Invert Left and Right Send the Left Signal to both ...
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0 answers
437 views

Understanding a rotary switch voltage rating

I am continuing work on designing a vacuum tube tester and curve tracer. I have described part of the challenge in this question: Designing an analog high voltage multiplexer The component I'm ...
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2 votes
3 answers
498 views

Rotary switch to turn LEDs on cumulatively

Problem: I have a 12 position rotary switch and 11 LEDs that I want to switch on one after the other until they are all on (on pos 12). Limitations: It would be easy to use a μC, but I wanted to keep ...
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1 vote
3 answers
294 views

High resolution angular position (~0.5 degree) measurement [duplicate]

I am attempting to replace a light/mirror sensor to measure the slight low speed oscillations/ rotations of a disc over a period of time. I want to record the angular position, but I wanted to find a ...
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1 vote
0 answers
69 views

Does potentiometer accuracy change with degree of movement?

I want to use a conductive plastic potentiometer for my actuator application where movement is +/- 40 degrees. As in datasheet, the potentiometer linearity is given as +/-0.2 % which I think is for ...
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2 votes
1 answer
344 views

Rotary Encoders

I am trying to find a replacement for an obsolete encoder. I thought I had found a good replacement, hiwever the unit increments up when turned both ways, instead of up for right and down for left. ...
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1 vote
2 answers
515 views

DIY rotary inverter technical and economical feasibility

I’m setting up a solar panel system (200W) that’s used to charge batteries that will power small appliances in a converted van. Solid state inverters are expensive and difficult to fix and it seems ...
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0 votes
1 answer
98 views

Receive same GPIO input signal on multiple raspberry's from one source

I'm having 7 raspberry Pi's 3 connected to 7 screens, running an python 2.7 app to download different images from google drive, every raspberry has different images. Geeqie is displaying those images ...
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1 vote
1 answer
191 views

How would I use a rotary encoder without housing?

I'm looking to buy a rotary encoder and I've stumbled upon this: which I assume is an encoder stripped of its housing. My question is how would I use it? There is no shaft to turn, so I'm assuming I ...
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1 vote
2 answers
3k views

How to handle rotary encoder overflow

I am using a magnetic rotary encoder(AS5048B) to detect the rotation angle of a motor shaft. This is fed to a pid loop to calculate the PWM value for motor position control. The encoder has a 14Bit ...
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1 vote
1 answer
263 views

How do memory seats keep track of their position?

I was wondering how do memory seats keep track of their position. Since this kind of equipment existed in 1990's cars, it must be simple yet ingenious. I have been thinking about this for quite a time ...
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-1 votes
1 answer
386 views

What do the pins mean on this rotary encoder?

I'm trying to repair a speaker of mine (old AudioEngine A5). The encoder that controls the volume is not working properly and turning the volume up REALLY loud sometimes when you touch it. I had some ...
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0 votes
2 answers
412 views

Determining optical rotary encoder RPM

I hope the first part of this question isn't too physics based for this forum but I am trying to use an optical rotary mask encoder such as this one (Optical Encoder Pair Kit) to determine the RPM of ...
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2 votes
1 answer
555 views

Rotary switch that changes resistance on each click?

I am trying to create controller for my car head unit as it lacks a volume knob amongst other things. I have worked out that when tapping onto the control pin I can "send" commands by applying a ...
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2 votes
1 answer
2k views

How to calculate RPM, given timer frequency and counter on STM32

on my STM32F103, I use a timer to read rotary encoder Prescaler = 71 Period = 20 Clock = 72MHz Rotary encoder: 2000 ppr Given the formula: TIMUpdateFrequency(Hz)=Clock/((PSC−1)∗(Period−1)) I ...
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0 votes
1 answer
71 views

Arduino reading double-din radio volume rotary dial knob [closed]

Hey all I bought a Chinese double din radio in order to modify it to my liking. The main reason why i went with this one is that it had a few buttons and turn knobs on the front and i wanted to use an ...
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25 votes
12 answers
17k views

Is there something such as an infinite potentiometer?

I am trying to find a component, that, similar to a potentiometer, delivers an analog output, but which can be turned indefinitely in a single direction. I have tried searching for something like this,...
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0 votes
2 answers
309 views

Why does this rotary switch register multiple positions simultaneously?

New to electronics, tackling a project that involves a switch matrix. Having grasped the concept of regular button matrices and modifier keys, it’s time to move on to explore alternative types of ...
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2 votes
9 answers
3k views

Can rotary encoders be multiplexed?

I am currently working on a MIDI based project and would like to use rotary encoders. However, due to the nature of my project I need to multiplex a total of 64 encoders with 8:1 multiplexers. Is ...
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0 votes
1 answer
659 views

Quadrature encoder interface loses count

I am trying to read the encoder signal of a drive amplifier using an ARM (TM4C). The amplifier has differential outputs (+- 5V), the MCU has 2 QEIs (Quadrature Encoder Interfaces). First I have ...
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0 votes
1 answer
191 views

Pass power to components on a high speed spinning motor

I have a small Emax RS2205 2600kv 16v DC Motor that is turning a PCB with IC chips that needs to be powered. I want to send 2 power cable (VCC and GND) from to stationary battery to the rotating PCB. ...
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3 votes
1 answer
181 views

Short range wireless pulse transmission in wind anemometer

I have an old windmil-type anemometer, something like this: (Illustrative image, the real unit is 40+ year old soviet-made device with presumably no operational active components inside) My project ...
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0 votes
2 answers
2k views

rotary encoder pin identification

Every datasheet that I have looked at mentions the function of pins A, B and C but no mention of D and E. I'm unsure which one is the push button output and which one is the Ground pin. I'm currently ...
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0 votes
1 answer
207 views

High resolution rotary encoder

I'm trying to find a way to translate small angle rotation into some form of digital signal. 1 degree resolution would be excellent, but something like 5 degrees would be ok. I need something like a ...
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1 vote
3 answers
1k views

SPI: MOSI not dropping LOW for receiving device

I hope this question is not a repeat of others on this stack exchange concerning SPI. I've been searching for at least an hour and have not found the same problem/answer. SCENARIO My friends and I ...
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4 votes
1 answer
2k views

KY-040 rotary middle push button switch is unreliable

I have the following rotary encoder with a built in push switch: http://henrysbench.capnfatz.com/henrys-bench/arduino-sensors-and-input/keyes-ky-040-arduino-rotary-encoder-user-manual/ I connect the ...
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2 votes
1 answer
7k views

STM32: Timer encoder reset

I configured my TIM4 as encoder input and everything is working well when I execute TIM_GetCounter(TIM4) But I would like to put the timer value back to 0 (reset?) when I press a push button with an ...
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  • 311
0 votes
1 answer
1k views

Mouse Wheel Rotary Encoder ... encoding wrong

OK, guys - I'm pretty confused here. I bought a cheap wireless mouse to gut and use in a project. Right now I'm trying to get the rotary encoder behaving, but (while it IS behaving) it's behaving ...
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