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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29 views

How to read data from a rotary encoder with ATmega328 [migrated]

I'm using a home made "bare bones" Arduino, made with the ATmega328, and I need to read angle data from a geared DC drill motor, turning at speeds between 0 and 450 RPM. This is so I can use it as ...
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1answer
38 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 ...
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1answer
16 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
38 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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0answers
32 views

Rotary Encoder Library for Beaglebone

I will use incremental encoder to measure angle with Beaglebone. However, I don't have any experience on decoding rotary encoder pulses into angle. Encoder : ...
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1answer
75 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 ...
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2answers
65 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 ...
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33 views

Is it possible to replace tact switches with a rotary encoder for volume control?

I asked here before if it's possible to use 2 rotary encoders at once (Is it possible to use 2 rotary encoders at once?), but I've dicarded that option, so I can still have the front of my radio ...
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4answers
141 views

Is it possible to use 2 rotary encoders at once?

I'm working on this project: http://www.corsaclube.com.br/viewtopic.php?t=102183 I'm basically installing an iPad mini on the dash of my new car, but I'm facing a problem: The iPad doesn't offer ...
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1answer
51 views

Encoder and decoder function [closed]

Can anyone explain the function of encoder and decoder with diagram.? Any help would be highly appreciated. Thanks.
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1answer
46 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 ...
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1answer
278 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 ...
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1answer
54 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 ...
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4answers
124 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 ...
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1answer
120 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.
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4answers
122 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. ...
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1answer
86 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 ...
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2answers
181 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 ...
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2answers
611 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 ...
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0answers
61 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 ...
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3answers
120 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 ...
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1answer
88 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 ...
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2answers
59 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.
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6answers
119 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 ...
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1answer
77 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 ...
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1answer
134 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 ...
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2answers
277 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 ...
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2answers
855 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 ...
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0answers
149 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 ...
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1answer
57 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 ...
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3answers
142 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 ...
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0answers
43 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 ...
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2answers
245 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. ...
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4answers
665 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 ...
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2answers
91 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 ...
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4answers
196 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 ...
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1answer
214 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 ...
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1answer
201 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 + ...
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2answers
144 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 ...
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1answer
242 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 ...
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2answers
238 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 ...
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1answer
140 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 ...
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1answer
103 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 ...
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2answers
85 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: ...
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2answers
1k 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 ...
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1answer
106 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 ...
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3answers
397 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. ...
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1answer
3k 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 & ...
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110 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 ...
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1answer
287 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 ...