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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27
votes
1answer
9k views

How does a ball mouse know the direction?

Foreach axis on a mechanical (ball) mouse there is an IR transmitter and receiver pair with a wheel that looks like having only simple slits. How is the direction calculated?
4
votes
1answer
367 views

AD725ARZ wrong colors

I designed device based on AD725ARZ, datasheet is here. Device is built basing on the reference circuit diagram on page 12. TV is connected to composite output of the circuit. It does not have S-...
0
votes
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 ...
8
votes
3answers
9k views

Using a LED to transmit data

I am curious about the possibilities offered by LEDs to transmit data over a short range (2 or 3 meters), and what maximum data transmission rate can be expected from carefully chosen, but consumer-...
9
votes
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. ...
5
votes
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 ...
3
votes
1answer
13k views

STM32 Rotary Encoder with Hardware Interrupts

I'm trying to get a rotary encoder working on my STM32. I have channel A & B being pulled up to 3V and debounced with 1uF capacitors. The board has channel A & B connected to PA11 & PA10 ...
5
votes
2answers
9k views

continuous servo position control

With a continuous rotation servo I can control the direction and the speed of the servo, but I need to control the position as well. I know it's not possible directly due to lack of feedback control ...
4
votes
1answer
960 views

Simple Implementation of BiSS C interface for a position encoder

The BiSS C DB3 protocol interface for Absolute encoder is an Open Source and Free Communication protocol hardware compatible with SSI interface. It is used widely in absolute position encoders. ...
2
votes
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 ...
2
votes
2answers
2k views

Implementing a function using decoder, encoder and some gates

Implement the function F(A,B,C,D,E) = A’B’C’DE’+ABCD’E using only the components required from the ones given below: One 3:8 decoder with active high outputs and an active high enable input One 8:3 ...
0
votes
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 ...
0
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2answers
11k 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.
5
votes
4answers
13k views

Wheel encoder using an IR sensor

I made a rotary encoder using a IR sensor and a wheel with printed black and white spokes. Everything seems to work but I'm wondering if there is a better way to code this. The IR signal looks ...
5
votes
6answers
13k views

How to interface a quadrature encoder with PIC?

I'm developing a prototype that uses a quadrature encoder to measure it's linear displacement. The encoder is attached to the prototype body and has a wheel in it's shaft. As the prototype moves ...
3
votes
3answers
877 views

Motor Control with PMW or RPM on heavy robot

I'm going to try to explain my problem as clearly as I can. I have been building a robot that has four wheels, 2 motors and 2 free wheels. Its a differential drive system. ...
3
votes
2answers
3k views

Low cost high precision linear position sensor [closed]

I am trying to find a low cost high accuracy linear position sensor that can be used in a hobby 3D printer. Almost all current 3D printer designs rely on stepper motors to provide positioning but I ...
2
votes
2answers
3k views

Figuring out wiring of optical encoder

I have a linear peristaltic pump (salvaged from medical equip. - likely used for dosing, etc). It uses a stepper motor and an optical shaft encoder. I have the motor working but I am confused about ...
2
votes
2answers
373 views

Magnetic Encoders - Tips and Tricks

I am new to encoders in general and I am thinking about using a magnetic encoder in a personal project were I will need to make my own servo, and thus get an absolute position reading (instead of the ...
1
vote
6answers
7k views

Rotary encoders to ensure 2 wheel robot goes straight!

I have successfully counted the rotary encoders on the wheel of my robot so this is not a problem. My problem is what to do with this number. Basically, the bigger problem is that I need my robot to ...
1
vote
2answers
2k views

Scrambler vs 8b/10b encoder

I was going through SATA3 spec. As per the spec, both scrambler and 8b/10b encoder are used in its design. Scrambler helps randomizing the data while 8b/10 encoder creates enough transition for DC ...
1
vote
5answers
667 views

Poor man large linear encoder

I'm looking for a way to build a cheap 1m linear encoder. Precision should be around 2cm (which is not really "precision"). Any advice will be welcome. @Joe Hass : yes it is moving. Not really fast. ...
0
votes
3answers
63 views

How to carry quadrature encoder data using a single signal?

A quadrature encoder can be thought of as two switches, usually sharing one of the terminals, i.e. we have COM(mon), A and B. Is there some simple way of carrying its output on a single wire? How ...
0
votes
2answers
273 views

AD725: is it dot crawl - and what to do about it?

Device's datasheet says One well known distortion of composite video images is called dot crawl. It shows up as a moving dot pattern at the interface between two areas of different color. It is ...
0
votes
3answers
980 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 ...
0
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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 ...
0
votes
3answers
3k views

How to make a 7 to 3 priority encoder?

I'm trying to make a 7 to 3 priority encoder for a circuit diagram for a class. The problem is that we have to take in a 7 bit number and output a 3 bit answer representing the maximum number of ...
0
votes
1answer
1k views

Quadrature counter on FPGA is running away

I am attempting to count pulses from a quadrature encoder in an Altera FPGA. I believe I have my counter set up correctly (circuit diagram below, following this tutorial), but when I turn my encoder ...
-1
votes
1answer
196 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 ...