Questions tagged [encoder]

An encoder is a device, circuit, transducer, software program, algorithm or person that converts information from one format or code to another, for the purposes of standardization, speed, secrecy, security or compressions

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3answers
987 views

Reducing the number of pins needed to read a 12-key keypad where the buttons are grounded?

Unfortunately, I'm not sure what the right question is; I'have a 12-key keypad. I wanted to utilise a matrix based approach, except that they all seem to be connected in such a way, that they're ...
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1answer
41 views

What do the values on the back of an encoder mean? [closed]

I have an encoder (at first I thought it was a potentiometer!) and on the back it has B1 03 (separated). Research thus far has shown that an encoder can have anywhere from 100 to 6000 steps. I ...
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4answers
3k views

How to use two encoder sensors with an Arduino Uno?

I have the following problem: I must use two encoders to measure the speed of two DC motors at the same time, using just one Arduino Uno. But the Arduino only possess two interrupt pins, and I need ...
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6answers
6k views

Removing digital noise on quadrature encoder signals

I am using a quadrature encoder with 3 lines to track the rotary position of a shaft attached to a BLDC motor(through a planetary gearbox). When I rotate the shaft, the A, B and Z lines always have ...
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1answer
107 views

Need help building a basic LED voltmeter [closed]

I have to make a LED voltmeter using basic logic gate circuits like flip flops, counters, encoders etc and show the input voltage using 7 segment displays. How do I count the input voltage. Will using ...
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2answers
632 views

Encoder terminology x1 x2 x4

As a translator from German to English, I'm looking for how English native speakers refer to this behavior of incremental encoders. The German here uses "4x-Auswertung" or "Vierfachauswertung" which ...
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0answers
760 views

Making a Tachometer using LED and Laser?

I am making a tachometer to measure speed of a wheel using a LED and Laser. The phenomena is that when Ray of Laser is shown on LED , 0.5 V are produced. I will connect a Schmitt trigger (made using ...
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2answers
668 views

Diodes in filter

When I analyzing rotary encoder filtering circuit, I found this filtering mechanism. It uses normal RC filter and then it uses some diode for filtering. This diodes are high speed switching diodes. I ...
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3answers
1k views

What is Virtual Encoder?

What is Virtual Encoder and how does it work? I found this phrase in swing gate operator (FAAC s418)datasheet. It says above "New control board with anti-crushing system and virtual encoder for ...
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2answers
207 views

Help with sensor curcuit - CR Encoder

I Recently disassembled two printers, and I found a lot of neat sensors that I'd like to use for my projects. I've tried to search around the web, but I can't seem to find any pin out or datasheet for ...
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1answer
445 views

Absolute encoder and offsets

I want to implement an RS485 absolute encoder, values 0-2048, on a canvas rapid door. The controller MCU that reads the encoder, which I will programm, may not be powered all the time, but it should ...
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0answers
138 views

PIC18 port b interrupt on change is very sensitive

I am running a stepper motor with my PIC18F46K80 microcontroller. This microcontroller offer me the port b interrupt on change feature which basically generates an interrupt if the state the port b ...
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1answer
816 views

Reading 2 Quadrature encoders using a single Arduino Due

I am working on an autonomous robot in my summer vacations. I am currently working on running the motors of my robot in a closed loop. In order to do so, I have to interface two Quadrature encoders of ...
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1answer
355 views

Encoding / Decoding solid '0' or '1' with IC (or discrete solution)

I ordered a rf 434MHz transmitter and receiver for a hobby project. It only needs to transmit a solid '0' or a '1' (this won't change more than once every 5s, probably much longer), so I thought I ...
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3answers
678 views

DC motor and encoder for pendulum with low static friction

I would like to build a pendulum from scratch and model/control via Matlab. I don't know what DC motor should I use that has low friction (low static friction), so the pendulum can rotate by its self. ...
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2answers
2k views

Wiring diagram for IE58A (Incremental-Encoder)

I have an incremental-encoder, the cable is torn and I opened it and find 8 wires. I'm now really confused how can I understand what are wires for. I want to replace the encoder with a new one so I ...
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2answers
871 views

Measuring phase difference between digital signals

I have been struggling for some time to come up with a meaningful way to test the phase difference between two quadrature channels of an encoder. I have access to a DPO 2014B Tektronix scope and have ...
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1answer
138 views

Priority encoder [closed]

I want to implement a priority encoder with 3 inputs. I know that an encoder takes <=2^n inputs and n outputs and i was thinking if this is possible(this was an exam question and it seems strange ...
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1answer
804 views

VT pin flashing LED on WT12D RF receiver module even with transmitter not enabled

The VT pin on the decoder side (signifying a valid transmission) flashes intermittently (sort of imitating a square wave pulse) This happens without me making any change in the circuit - no address ...
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1answer
2k views

Open Collector Circuit Needs Pull-Up Resistor to Measure Frequency?

I need a little help determining what I need in order to measure frequency from an Encoder containing the attached Open Collector Output. The 5 Volts will actually be 24 Volts in my scenario (this is ...
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1answer
448 views

Encoder missing counts

I have a question about rotary incremental encoder, when there is a problem within an encoder, and this one misses a count: 1.if he misses a count on the A signal does the related B signal also ...
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3answers
2k views

Switch Debounce Topology for Rotary Encoder [duplicate]

I'm looking to debounce the output of a rotary encoder I'm using as a switch to ground with a pull-up. Looking online I saw the debouncing circuit in Figure 2 and read about it here. However, I also ...
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2answers
407 views

Rotary Encoder for Android GPIO

I'm not too sure if this is the place to ask but I'm not sure where else this question belongs. I'm trying to hook up a rotary encoder to an Android dev board's GPIO pins, although I'm having trouble ...
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3answers
3k views

Rotary encoder to 2 buttons

Please excuse me if this question is a very obvious one, I have searched on here but my electronics knowledge is very very basic. Here's what I'm trying to do, I have taken an old Android phone ...
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1answer
327 views

Measurement of marine propeller pitch

I have a small project that I'm trying to figure the cheapest and most reliable method for. I. Wanting to measure various points along an outboard motor propeller to gauge the exact pitch to be able ...
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4answers
4k views

How do I get a position from an encoder?

I have a motor that drives a rail which I need to know the position of. I have an AM102 encoder attached to the motor. But am unsure how to get a position from it. I have powered it up and attached ...
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3answers
968 views

Minimise backlash in DC geared motor

I am new here, I actually work on application programming. As a hobby I started to work with arduino and dc motors. Soon I ended up with backlash problems. Right now I am using a rotary encoder which ...
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1answer
559 views

AS5048A SPI - 13bits instead of 14bits resolution

I'm trying to make a driver for as5048a (spi) on STM32f405rg This magnetic encoder is supposed to have 14bits of resolution : and the read package shows that the 2 MSB are parity and error flags So ...
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1answer
2k views

How does a Rotary Encoder work without connecting it to 5V

Like in this picture: I know we can hook 5v later externally to debounce but still, i heard it works without debounce circuit even if its bouncy. But how can it send signals if there are only output ...
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3answers
2k views

8-bit binary U/D counter with rotary encoder

Im trying to make 8-bit binary counter using CD4516 / HEF4516 (doesnt matter, both act same). My circuit works well excepct one error. I can successfully go from ...
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2answers
2k views

Input circuit to handle both single ended and differential motor encoders

I'm working on a motor controller design that I would like to be as flexible as possible without driving up my BOM cost and board area more than necessary. To that end, I would like to use a single ...
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1answer
5k views

calculate encoder period from motor rpm?

Let's say I have a stepper motor which rotate at a speed of 1000 RPM and I have an incremental encoder attached directly to the shaft with 4096 PPR (pulses per revolution). How I can measure the ...
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1answer
576 views

Dc Motor Position Control

I am driving dc motor with drv8848. I send pwm pulse to the drv8848 and then ı read encoder value. My pwm frequency is 500 Hz. So here is my problem, pulse count is same but encoder value is different....
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1answer
533 views

Detect rotation direction of a rotary switch

Posted recently this: https://electronics.stackexchange.com/questions/210904/detect-rotation-of-a-rotary-switch But I want to be more precise about what I'm trying to do. I have a 1 pole 8 position ...
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1answer
134 views

How to generate constant movement given variable opposing resistance?

I need to generate constant movement in one direction given a variable opposing force even while "stalled" (no net movement in either direction) and when the opposing force is greater than the force ...
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2answers
89 views

Effects on motor encoder by over-volting

I'm using Maxon RE-max 17 4.5W 12V DC motor with encoder attached for my research. Currently I'm using up to 18V for the voltage input to get a better rotation speed and torque. My questions: Is this ...
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1answer
370 views

How to implement line code?

I am looking for an easy way to implement a line code (both the encode and decode parts). This could be something like Biphase Mark Code, Differential Manchester, or anything else that has the ...
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1answer
69 views

Sony STR DN1030 2nd volume control using a second Vr Encoder

First off, I am very, very new to any electronic physics/engineering. Here's my problem: I want a second remote volume control for my receiver that is wired to my desk. (I have already managed to ...
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5answers
8k views

Interfacing multiple rotary encoders to a microcontroller

What, in your opinion, would be the most efficient way to interface muptiple (let's say, >20) incremental rotary encoders to GPIO-limited microcontroller (for example, ATxmega128A4U, 44 pin)? ...
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1answer
99 views

Sending serial signal of HT12A encoder by wire over 25 meters distance

This question has been asked many times, but I couldn't find something regarding sending out serial binary pulses from HT12A encoder over long distance. The wire will be running beside of AC 220v ...
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1answer
207 views

Encoder/decoder for serial connection without separate clock?

I'm putting together a link where the physical layer is SPDIF transmitters and receivers. I control both sides of the link (ie it doesn't have to interoperate with any other equipment). I would like ...
0
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1answer
133 views

How to connect absolute encoder on the rotating shaft. Please see the three options?

Hi, Here I have added 2 options for connecting encoder on shaft. Motor, gearhead and shaft is connected using coupling. But where will be best place for encoder (To avoid backlash from coupling and ...
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1answer
479 views

Encoder PCB design - grounding, noise and decoupling

Hi first time posting here. There always seems to be helpful answers and tips. Okay my question is simply are there any glaring mistakes in my approach to the PCB layout (see image links below), I'm ...
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12answers
4k views

Tracking rotation with extremely high accuracy

I would like to track the angular position of a fairly slow motorized rotating arm (direct-drive; see illustration below) -- but require angular accuracy of under 0.05°, and similar resolution. As @...
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1answer
776 views

Differences and conversion between encoding techniques (NRZI, Manchester, MLT3)

I'm currently reading a lot about different encoding techniques for data transmission, in particular ethernet, fiber (and usb). 10Base Tx ethernet uses Manchester encoding for data transmission. But ...
36
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2answers
8k views

How does a laser printer control the laser to produce such high resolutions?

I opened up a broken laser printer yesterday to find one of the important sections (this is an example photo from Google Images), trying to learn from the design of the laser+polygon mirror motor ...
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3answers
3k views

How these laser show systems work

I am trying to understand how laser show galvanometer systems like this one create high-resolution movement, and generate drawings of reasonable precision (w.r.t. minimum beam angular-deflection step ...
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3answers
92 views

Optic encoder - Rotation

In the following you can see the channel A ( above ) and the Channel B ( middle) output of an optic encoder that is connected on a rotating shaft. My questions is: Does the impulse width impact the ...
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4answers
8k views

How to achieve very accurate/fine rotation with motor

I am running an experiment where I need to rotate a lightweight dial (<5 grams, so very low torque requirement, and fairly slowly), but need to do very accurate, fine steps of 0.03 degrees. ...
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2answers
192 views

rotary encoder, got a 20ppr but need more like 200 ppr [closed]

I'm a tinkerer who is attempting to turn a guitar pedal into a remote tempo control for a drum machine, which uses a rotary encoder. In place of the potentiometer in the guitar pedal, I have put in a ...

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