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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57 views

STM32 Encoder mode + Input Capture on the same timer

I want to use CH1 and CH2 in encoder mode and also CH3 in input capture mode, all this using one timer (TIM3). Is it possible? I didn't found any warnings in datasheet. I looked at the block diagrams ...
2
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3answers
54 views

Switch Debounce Topology for Rotary Encoder

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
56 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
82 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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0answers
28 views

Better data encoding for 433 Mhz OOK communication

I'm looking for a Manchester Encoding alternative for 433 Mhz OOK communication. Is 5B/6B data encoding appropriate for this application? It also provides 0 DC voltage average. And it doesn't require ...
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1answer
73 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
151 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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0answers
38 views

Gray-code Encoder - Verilog

Given the truth table of gray-code encoder, how do I calculate the canonical forms for each output; w, x, y? I am trying to write the code in Verilog. I am very confused on where to start. My ...
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2answers
86 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
70 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
46 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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0answers
42 views

Turning Optical Encoder into Digital Outputs

I've got a challenge... I'm working to build a custom arcade game. Specifically, this is an arcade version of the original Mario Kart. I've got an arcade steering setup that works off of an optical ...
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3answers
124 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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1answer
96 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
114 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
66 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 ...
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1answer
111 views

Detect rotation direction of a rotary switch

Posted recently this: 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 rotary switch with continuous rotation, and I need an ...
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1answer
60 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
43 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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0answers
35 views

QEI module in lpc1768

I am working on lpc1768 qudrature encoder interface module. I am not able to get the velocity compare feature to work. I am able to read the velocity and but the the velocity interrupt is not asserted ...
2
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1answer
113 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
37 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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4answers
610 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
49 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
59 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
55 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 ...
5
votes
1answer
173 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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13answers
673 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
119 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 ...
19
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2answers
2k 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 ...
5
votes
3answers
689 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 ...
2
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3answers
60 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 ...
5
votes
4answers
1k 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
79 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 ...
0
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1answer
2k views

How to connect 16x2 lcd to esp8266?

I have ESP8266-01 this model I Updated the frimware to nodeMCU and uploaded the web server code and tested by blinking led via web browser. Now I want to test that if I can send text data from web ...
0
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1answer
121 views

Why are servo motors geting weaker in a few minutes?

What I am experianceing is very weird but I will try to explane it as best as I can. I have a simple robot arm with 4 Degrees Of Freedom (DOF). This is not a robotics problem but thought it would be ...
1
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0answers
224 views

What happens when you use internal+external pull-up resistor?

I was working with an Arduino One and this rotary encoder from SparkFun. Then, for no good reason, I put three pull-up resistors, one for each input pin (pin 2, 3 & 4) facing the encoder, like ...
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2answers
507 views

How does sin cos encoder work?

Sin cos encoders are used in motors to determine position and direction of motor. However I am unable to understand its exact working.
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2answers
2k views

Making a robot go straight using encoder motors and micro-controller (Arduino)

Now I have a simple chassis with two wheels which are powered by encoder motors. I connected Arduino Uno with the chassis and made a simple program to just count the numbers of signals (in simple ...
2
votes
3answers
409 views

Where to place debouncing circuit for remote mounted buttons and rotary encoders

I have an application where a push button and mechanical grey-code rotary encoder(user inputs) need to mounted away from main pcb. 24" - 48" away. This is for space and packaging reasons. Is it OK to ...
6
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2answers
323 views

What type of encoder is this (optical, magnetic, inductive… etc)? and how does it operate?

I have found this circuit mounted to a DC motor. It is probably an encoder but I don't know how it works. I have looked everywhere but I could not find a similar encoder assuming that this is in ...
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1answer
100 views

Absolute encoder or Incremental encoder?

I'm planning on making a robot whose exact location can be tracked, which would be appropriate to use-- an absolute encoder or an incremental encoder and convert the number of rotations to distance ...
3
votes
2answers
199 views

Help me identify this rotary encoder [closed]

I need help identifying this 360 degree rotary encoder on my Roland SC-880 rack synthesizer. This one has become 'jumpy' and Roland claims the part is discontinued. So my only choice is to replace it. ...
0
votes
3answers
147 views

Appropriate Method of Counting counts from a Quadrature Encoder

I'm using an Mbed to drive a DC motor which will follow a trapezoidal trajectory. What is the most appropriate way to determine position from the quadrature encoder? Should I use interrupts, or is ...
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votes
2answers
460 views

Design Priority Encoder using only NAND and NOR Gates

I'm trying to build an 8-to-3 priority encoder using only nand and nor gates. Below is a 4-2 priority encoder, however it is using only ands, ors, and nots. If I have specific activation levels (some ...
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votes
1answer
544 views

Using HT12E/D with RX/TX 433Mhz modules

i have ht12d and ht12e ic's and rx tx 433Mhz modules. i arranged the ht12e to the output port of Microcontroller and connected the ht12e to transmitter and similarly to the recieving side. is it now ...
0
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1answer
74 views

LPI requirement on optical encoder

I am using the AEDR-8300 as a simple optical encoder solution. The part seems simple enough: An LED emitter Photodiodes that pick up the light that is reflected from a codewheel or black/white strip ...
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2answers
107 views

Two phase frequency doubling a rotary encoder

I have a 600ppr quadrature encoder that I would like to get the highest possible resolution out of. I need sub arc/second accuracy for my project. I saw differential Manchester encoding as a solution ...
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1answer
469 views

UVC Compliant H264 Encoder for PAL/NTSC Analog Camera Modules

I've been looking for some weeks on a part/module and haven't found anything so far. I've been experimenting with streaming techniques using Logitech C920 webcam. This webcam has an embedded H264 ...
0
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2answers
376 views

Stepmotor closed loop - matching encoder and microstep resolution

I am trying to get a high accuracy and not so extremely high resolution motor to work. It's a step motor with 200 steps/rev and the motor driver can compute up to 400x microstepping. We have an high ...