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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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0answers
50 views

Traveled distance calculation from encoder

On my project, i have a moving unit that has wheels and one 400 ppr incremental encoder is connected to the wheels by a belt system. My problem is i couldn't calculate what would be the encoder pulse ...
3
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0answers
45 views

Two identical stepper motors behaving differently at higher (but below their rated) speeds

Note: My question might be short on specifics here when it comes to the motor-parameters, but I have been trying to understand a situation for the last 2~3 Weeks, and I still don't have an ...
3
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1answer
236 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
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1answer
81 views

How to make my own sequence of numbers and letters in a seven segment display circuit?

In this circuit, I have connected a single switch to a priority encoder, which is then connected to some inverters, further connected to a binary decoder, then to some current limiting resistor which ...
2
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2answers
125 views

HT12e: How is this a 2¹² encoder?

I am using HT12E, for a rf transmitter circuit. As per the datasheet HT12E is a 2¹² encoder. Ideally such an encoder must have 2¹² inputs and 12 outputs. In addition to that all the inputs should be ...
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0answers
24 views

Servomotor wont follow servodriver

I have two EDB10A servodrivers with factory reset and two EMG10APA servomotors. One motor always runs like crazy even on jog mode (exceding the 10RPM setpoint). I did a simple test exchanging both ...
0
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0answers
10 views

avoid synthesizing priority encoder for onehot to binary conversion module

For https://github.com/jbush001/NyuziProcessor/blob/master/hardware/core/oh_to_idx.sv#L40 , why use OR operation to avoid synthesizing priority encoder ? if DIRECTION != "LSB0" and NUM_SIGNALS isn'...
3
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2answers
177 views

Anyone got these optical encoders working? [closed]

I got these Optical Encoders from a local vendor and connected it to my arduino in the following order; (+)----> 5v (-)---> Gnd (01)--->2 (02)--->3 But, it burnt and smoked out as soon as I ...
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2answers
62 views

Read Quadrature encoders over I2C bus

I need to add encoders to the 4 motors attached to a "remote" PCB. The remote PCB in question does not have microcontroller on it, but rather is connected to the microcontroller PCB with an I2C ...
1
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0answers
37 views

Decimal addition using a different BCD WEIGHTED CODING

The problem that I'm having trouble in understanding is how the addition of two decimal numbers such as 17 + 4 can be represented using the weighted BCD CODE, [7 4 -2 -1] and binary addition ...
0
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0answers
20 views

Data rate with modulation and conventional encoding

I had a rather simple question. Say I had a SISO communications system with an information data rate of 50 Mbps that uses QPSK modulation and a rate 1/2 conventional coding. What would be my symbol ...
0
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1answer
26 views

interrupt-on-change on 8051 microcontroller

I am trying to read the speed or number of rotations pulses of a self-made encoder motor. I am using an AT89C52 microcontroller. It gives external interrupt on rising or falling edge. How can I ...
0
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0answers
19 views

how to use Sick ATM60 encoder configuration commands

The Sick ATM60 SSI Absolute Encoder documentation describes 29 function commands that appear to be useful to configure the encoder and obtain configuration information. The electrical interface ...
0
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0answers
27 views

Max frequency of LPC1768 QEI

Does anybody know what the highest frequency the LPC1768's QEI can handle, with X4 encoding? I've checked the datasheet, and it wasn't clear.
0
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1answer
42 views

Quadrature Incremental Encoder A&B phase

It’s been two days that I’m searching to understand how an incremental encoder’s precision is quadratured. I found out that we must be counting the state changes of the two channels A and B, where ...
1
vote
3answers
121 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 ...
2
votes
3answers
96 views

Generate a false encoder signal CW/CCW 1/4 shifted

I need to generate a 10-100khz square signal freq. to simulate an encoder. I'd like to be able to simulate CW and CCW, shifted by 1/4 th signal. I've thinked about a crystal with a pot and some logic ...
0
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0answers
39 views

CXA1645 replacement - most convenient switching between PAL and NTSC

I have built NTSC encoder using CXA1645, and picture through composite out is great. Now I want to extend it to PAL, because output device encoder is attached to can operate in both modes, changing ...
0
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2answers
60 views

4 axis quadrature encoders? [closed]

I am currently working on a digital input card which will feature quadrature encoder inputs. To my (basic) knowledge, quad encoders use two pulse trains that are 90 degrees out of phase with each ...
0
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0answers
28 views

Choosing a position sensor (encoder) and obtaining velocity from it

How do I know how many counts per revolution I need for an encoder for my application? I need to be able to accurately capture a 1000 Hz signal on an input side running from 1-133 rev/sec (60-8000 ...
0
votes
1answer
109 views

Quadrature Encoder Interface Circuit

This is an interface circuit of Quadrature Encoder (A, A', B, B') with MCU. I cannot make sense of the working of OpAmps in this circuit. Is it some standard circuit for doing signal conditioning or ...
2
votes
1answer
138 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. ...
0
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2answers
56 views

quadrature encoder

I have an quadrature encoder. my minimum and maximum positions are fixed, and I can count the relative position. If my encoder is mid way, looses power and is then restarted, how can I know my current ...
0
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1answer
37 views

PIC QEI encouter values being weird

I'm getting weird values when using the QEI on the dspic33. The QEI counter goes up to about 32700 then goes to negative 32650 and starts decrementing to 0 where it starts from 32700 and starts ...
0
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2answers
491 views

How can I design a 8 to 3 priority encoder using 4 to 2 priority encoders?

This is what I've done so far and I really don't understand how to continue. The V variable is for verification [EDIT] it works for Y2 and Y0, but it doesn't work for Y1
1
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1answer
107 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 ...
0
votes
2answers
388 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 ...
1
vote
1answer
47 views

Step down open collector circuit

I'm trying to use the LPD3806-400 incremental encoder with an Arduino DUE. I have the problem that the datasheet says 5 V to 24 V and also the output is open collector. Therefore, I have to pull up ...
3
votes
1answer
151 views

Unusual Rotary Encoder Output

I'm trying to replace a rotary encoder with push switch from a Boss SE70 effects unit as the switch is broken; the same encoder is apparently used in a number of Roland products such as the JD-990, JV-...
0
votes
1answer
107 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 ...
-1
votes
1answer
133 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 ...
1
vote
1answer
75 views

Confused why outputs of a priority encoder could be X instead of 0 or 1

So this is the truth table given for the Priority Encoder: and this is its logic diagram: I am extremely confused with the part where the outputs x and ...
3
votes
2answers
1k views

Why do we need bit scrambling when using 8b/10b?

I want to ask the opposite of this question. Here are the purpose of the bit scramblers: Encrypt, but LFSR (and other used) bit-scramblers are breakable. Clock recovery, but it is done by the 8b/ ...
2
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2answers
874 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
143 views

Is the wikipedia article on 3b4b encoding in 8b10b encoding correct?

On the wikipedia page for 8b10b encoding (as of writing), the 3b4b table shows that if RD=-1, the outputs can have more 0's than 1's, and if RD=+1, it can have more 1's than 0's. This does not make ...
0
votes
1answer
362 views

Problem with my 8-to-3 line priority encoder using verilog gate level description

I am attempting to build a working 8-to-3 line encoder using gate level description in verilog. Although, I have working models, in terms of successful compilation and simulation, the recurring issue ...
0
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1answer
40 views

2D Positioning Localization

I have a robot. My robot has three main sensors one is a gyro from which i can get my yaw, pitch, and roll. I also have an encoder in the x and y axis. How can I use these sensors together to reliably ...
0
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2answers
203 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 ...
0
votes
1answer
54 views

Testing an Encoder's Accuracy

I'm using a high-frequency (1024PPR) RS-422 encoder, connected to a differential line receiver, and in turn, a quadrature encoder interface. Initial tests were conducted with a low-PPR hand turned ...
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1answer
43 views

Tail biting Convolution Encoder

I understand how encoder and decoder works but what are theses values ??
1
vote
4answers
446 views

Method to determine angle of a rotating stage

I am currently working on a project that requires the rotation of polarizers to very specific angles. It is necessary that we are able to determine what angle the polariser is currently at so that we ...
0
votes
0answers
16 views

rateless code is worse than purely retransmissions in single link scenario?

As the title says, I found that the rateless code or fountain code is only optimal in multi-cast scenarios, i.e., multiple link transmission. In single link transmission scenarios, the retransmission ...
0
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2answers
556 views

Measuring Rotary Encoder Signal with Multimeter

I'd like to measure the A and B signal of an encoder (https://www.amazon.co.uk/gp/product/B079H3C98M/ref=oh_aui_detailpage_o06_s00?ie=UTF8&psc=1) using my multimeter. I've tried testing the A ...
0
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1answer
209 views

Hooking up incremental encoder to mbed

I've spent the last hour trying to get an incremental encoder working with an mbed module. Keyes KY-040 Rotary Encoder https://www.amazon.co.uk/gp/product/B079H3C98M/ref=oh_aui_detailpage_o06_s00?ie=...
3
votes
1answer
428 views

Voltage regulator frequency range

I'm designing a new encoder pulses counter for my project, my encoder HE50B uses a 12-24 VDC Input, and it has 1,000 pulses per each revolution. also the maximum permissible speed is 5,000 RPM. Now I ...
2
votes
1answer
695 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 ...
0
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3answers
351 views

how to find the DC motor turning angle using encoder?

I have a DC motor (MTR11_200) encoder rotating at 100 RPM with and encoder(EH_30_M) which sending 200 PPR how to fix the DC motor to turn at specific angle using this information?
17
votes
9answers
7k 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,...
1
vote
1answer
55 views

Modulated IR for optical transmission of encoder data (TSOP 4840)

Some background: I am a mechatronics engineer and I have just recently started my first job out of university as an electrical engineer. I feel a little out of my depth but I wasn't going to turn the ...
0
votes
2answers
219 views

How to connect two FPGA boards - VHDL

Hi all, I am trying to figure out a way to connect two fpga boards (like in the image) for a Morse code decoder/encoder. Our first plan was to make the decoding and the encoding in the same board ...