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

learn more… | top users | synonyms

-3
votes
1answer
29 views

Encoder and decoder function [on hold]

Can anyone explain the function of encoder and decoder with diagram.? Any help would be highly appreciated. Thanks.
-2
votes
0answers
31 views

How to get angle of movement and feedback in dc motor?

I am working on a project. I that project i need to turn the robot 90 degree exact left and right. Also i need feedback from the robot to monitor its actual position.I studied about encoders but ...
-3
votes
0answers
26 views

Forming Larger Decoders / Encoders

I was asked if we could implement a 4x16 decoder with different sets of smaller circuits. two 3 x 8 decoders with one 1 x 2 decoder, five 2 x 4 decoders four 2x 4 decoders and three 1 x 2 decoders ...
0
votes
1answer
36 views

Can't seem to determine quadrature encoder resolution

I'm currently working on an autonomous terrain-mapping rover, and I've run into problems in the seemingly most straight-forward area: processing quadrature encoder data. For any unfamiliar, a ...
0
votes
1answer
128 views

Optical encoder in Proteus

I am working on dc motor speed control project in proteus and for the feedback i am using optical encoder.Dc motor speed is calculated by counting pulses from encoder. But i wanted to know what is ...
0
votes
0answers
39 views

Can a rotary incremental encoder, count more steps due to interferences

I have an incremental encoder having differential signals A-NotA, B-NotB I-NotI, that apparently randomly seems to count more impulses. It is possible to have more impulses due to electrical ...
1
vote
4answers
114 views

What are my options for interfacing **30** incremental encoders to an MCU?

Background: I am familiar with interfacing a few incremental/quadrature encoders to a single MCU chip. My go-to chip STM32F10x can decode 4-5 encoders even in a ...
1
vote
1answer
91 views

Binary Encoder Circuit

How exactly would I go from 7 output lines to 127 outputs. Since you can encoder a value of 127 with 7 lines I would imagine this should be possible.
0
votes
4answers
109 views

Getting frequency of a signal from its phase

How Can I get the real time frequency of a signal from its encoder phase angle. The encoder gives us a triangular wave from (0-2*pi). If I use derivation, I get discontinuity which provoke spikes. ...
2
votes
1answer
82 views

Maximum rotation speed for a potentiometer?

After a slight purchasing mishap, I am to end up with an encoder whose max RPM is too low for the application for which it is to be used. To achieve roughly the same purpose (that is, sensing of an ...
1
vote
2answers
108 views

Differential Manchester Encoding

I am trying to understand Differential Manchester Encoding. The way I understand it is that the representation depends on the previous bit. If the previous bit was 0 there is a transition, but if it ...
2
votes
2answers
438 views

What is the use case difference/benefit of using a Gray code vs. Incremental rotary encoder

I am planning to build a small digital project where a rotary encoder would be ideal for sending "up/down signals" (e.g. scrolling through a list on screen). Are there any benefits of using a Gray ...
0
votes
0answers
44 views

what is superposition coding?

In the context of multiple access techniques, there is a coding scheme called "Superposition Coding" or particularly "Superposition Coding with Successive Decoding(SCSD)". I surfed the internet, and ...
0
votes
3answers
108 views

Does it take long to implement RSA in hardware?

I just finished my first Digital Hardware course. We covered combinational circuits, sequential circuits and FSMs. We now need to create a final design project. We have 2 weeks to do so and we work ...
1
vote
1answer
81 views

How does a Successive Aproximation ADC Handle Negative Voltages?

First, apologies for what must seem a simple question to most of you. I do understand the SAR algorithm. And Two's complement representation. My question is algorithmic. When a negative voltage is ...
0
votes
2answers
58 views

What is the function of switches in optical panel encoders?

I want to use optical encoder in my design. In the datasheet of the optical encoder, pin2 and pin3 are used as switches. Could you please explain how these switches work and how to use them? Thanks.
1
vote
6answers
115 views

Accurate sensor for a rotating object

I have a square-shaped plastic plate (3 cm length X 3 cm width X 1.5 cm height) attached to a motor that rotates it at 500 Hz: I would like to have an interrupt fired on my microcontroller every ...
0
votes
1answer
73 views

G.711 for dummies

I am in midst of some online telephony course, and there are questions regarding which I have no one to ask but this community. G.711 volume encoding. I have some difficulty to understand how ...
0
votes
1answer
124 views

Encoder sampling rate realization

I know that questions from a mechanical engineer might sound a little naive to you :), but here I go: I am trying to use an Arduino Uno as the brain for a DC brushless motor that we have for a ...
1
vote
2answers
256 views

DIY passive RFID? [closed]

I'm interested in building my own "DIY" RFID scanner and tags. For the scanner, I think I would just need: Transceiver Some kind of hardware polling mechanism to have the scanner scan, say, every 2 ...
0
votes
2answers
682 views

How to use a 10 pin dip switch on a 8x3 Encoder (IC 74LS148)?

I've been trying to get an 8x3 encoder (IC 74LS148) working using a 10 pin dip switch, I simply connect the 1-7 ON sides of the switch as inputs for the encoder and the OFF sides of the switch to the ...
0
votes
0answers
136 views

Generating a Trapezoidal Motion Profile

I'm working on a project which involves the use of a servo motor to pull an object along a track. The servo motor will have a quadrature encoder to calculate the position. I'll probably implement this ...
0
votes
1answer
54 views

Is there any significant difference between the couple of photointerrupters and a reflective?

This may sound a little bit silly though.. but I do hope you guys can give me a little bit of tips if u do have any? :) Which kind of optical encoders you think is the easiest to use if I am to ...
1
vote
3answers
138 views

Planning to make a pen-like device which has a roller rolling on a surface and measured its linear distance travelled

I am planning to use a microcontroller to do the brain works of receiving pulses from the encoder and compute it to output linear distance and at the same time indicating the measured distance as ...
0
votes
0answers
41 views

Encoders Pulling Too Much Current

I bought six of these optical encoders for two omni-directional robots. They are powered by a 12V battery pack regulated with a LM7805. One set of encoders (the one on the working robot) pulls 0.03 ...
0
votes
2answers
212 views

Multiplexing signals of two wires of a BNC cable and transmitting over a single wire

Background: I have a normal CCTV camera (650 TVL) . It requires a BNC cable in order to feed video signal from camera to DVR. Problem The problem is I have only a single copper wire from CCTV to DVR. ...
2
votes
4answers
584 views

Cheap, reliable, low resolution, linear position sensor

The question I am looking for an absolute linear position sensor that can span a distance of 40 cm with ~5 mm accuracy. My primary concerns are reliability and cost at a production scale of ~10,000 ...
0
votes
2answers
81 views

Cell phones video encoding

My question is, how are cell phones bale to produce on the fly video like mp4? Are they using a hardware encoder chip? Because most of them run on ARM chips? Are there ARM chips that can handle the ...
3
votes
4answers
193 views

Dialing a miniaturized stargate

I want to build a miniaturized Stargate but I have no clue regarding the electronic part. The Stargate is a fixed circle with 9 chevrons (see links bellow). An inner circle is spinning inside the ...
0
votes
1answer
190 views

Netduino Interrupts Affected By PWM - Diagnosis of Issue

I've got a funny problem with interrupts and PWM signals that's causing false interrupts to trigger. What exactly is happening is that I'm using a hardware debounced quadrature rotary encoder. The ...
0
votes
1answer
159 views

design a 8 to 3, valid output - priority encoder with AND,OR,NOT Gates

I'm trying to implement a 8 to 3 priority encoder which worked quiet well. My function for the three outputs are: $$A_0 = e_1 + e_3 + e_5 + e_7$$ $$A_1 = e_2 + e_3 + e_6 + e_7$$ $$A_2 = e_4 + e_5 + ...
0
votes
2answers
140 views

Coding a priority encoder

Let's say I have a 25bit priority encoder. So each input pin from \$i_{24}\$ to \$i_0\$ has its distinct priority in our encoder. That means that if more than one inputs are active, the encoder will ...
1
vote
1answer
226 views

Monitoring a fan with 2800 RPM with a Siemens 27-226 PLC

I have a fan that rotates at 2800 RPM. I need to make sure that the fan is operating. I need to monitor the fan. It has an output that gives a signal 2 times per rotation so it's 5600 pulses which is ...
0
votes
2answers
217 views

Motor/driver for smoothest and most constant speed

Which type of motor/controller can maintain the smoothest and most constant speed in the range 300 - 1000 rpm with minimal vibration? ie: low cogging torque, etc. I have an application in mind which ...
1
vote
1answer
127 views

Do any rotary encoders allow zero idle current

Many microcontrollers and logic devices (programmable or otherwise) are capable of drawing very little current when nothing is happening. If a double-throw switch is wired to such a device, then when ...
1
vote
1answer
98 views

Wiring up a Knitter-Switch rotary encoder

I have two MERP 12 24 126 GR rotary encoders from Knitter-Switch. The only information i can find regarding this encoder is here http://www.knitter-switch.com/pdf12/E-2012-MER12-MERP12illuminated.pdf ...
2
votes
2answers
84 views

Create a fake depth encoder signal on a surface system?

I am trying to create a test box which will do away with the actual depth encoder as it is awkward to have out all the time the encoder is similar to this: ...
3
votes
2answers
892 views

Incremental Encoder and Arduino

I have wired a 600 p/r incremental encoder to an Arduino Uno. My question is this: Given that the Arduino has a clock speed of 16Mhz and I really do not want to miss a single pulse I am creating a ...
0
votes
1answer
105 views

Handling large numbers of input contacts

I'm trying to interface a large number of contacts (<=1024) under velostat with an arduino DUE. I have a large array of pads and I want to detect when any one point goes high (think of this as a ...
3
votes
3answers
373 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. ...
2
votes
1answer
2k 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 & ...
0
votes
0answers
100 views

Meaning of GS output parameter in TTL octal encoder (LS148)

LS148 encodes eight data lines to three-line (4-2-1) binary (octal). We had an experiment wherein there are eight push buttons corresponding to decimal inputs from 0 to 7. In our experiment, the state ...
1
vote
1answer
263 views

Whats the name of a BMW iDrive type of encoder? [closed]

I am looking for a component that some people call a 7 way encoder switch. Basically, if you look at the center piece of the BMW iDrive, its that. It's a knob looking piece that if you turn to the ...
1
vote
1answer
238 views

Measuring rotations problem with motor encoder

I have this motor encoder mounted on the back of a 120RPM motor which has a gearing of 298:1 ratio. The back shaft is directly from the motor, not through any gears. Im using an encoder disk that has ...
2
votes
2answers
883 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 ...
1
vote
0answers
114 views

Control Loop Frequency [closed]

I haven't started tuning/setting up my controller(s) yet, but already having trouble with the control loop frequency. This code shall later control the position of a X-Y stage. The code: ...
1
vote
5answers
279 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
1answer
84 views

How IC encoder ΤΧ-2, encodes signals?

I 'm trying to figure out the way IC encoder ΤΧ-2, encodes signals. The procedure, if I am correct, is: Receives input data (DC signals). Generates digital pulses, via an internal oscillator. a. in ...
2
votes
4answers
244 views

Adding indicator LED to optointerruptor circuit?

This question relates to my earlier question on how to wire an optointerruptor:Figuring out wiring of optical encoder I was able to get the optointerruptor working using the circuit below. I wanted ...
0
votes
0answers
149 views

Signal encoding on Realtek TX2 IC [part 2]

The image below shows IC Realtek TX2 encoder (pinouts and block diagram), which is part of an RC car transmitter circuit. Datasheet refers: "The frequency of pulse depends on the local oscillator ...