Embedded Stuff
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1 answer

How to abstract from a display?

I'm building an embedded text editor consisting of a keyboard, an LCD display and a PIC32 microcontroller, to be programmed in C. The application should look, for example, like the GNU nano editor. ...

3 answers

How can I use an analog switch to control a higher voltage than vcc?

I am using an Arduino and several analog switches (TEXAS INSTRUMENTS CD74HC4066E) to control several items (LEDs and other devices.) The switching voltage that comes out of the Arduino is 5v, but ...

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Eclipse - Arduino Uno using Java on Ubuntu 14.04

I am trying to control my Arduino Uno using Eclipse through the JArduino libraries. I have imported everything successfully and compiled the code for a simple Blink program. However at run time, I get ...

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ESXi host loses connectivity to embedded USB storage

Referencing ewwhite's SF question/answer here: What happens when the USB key or SD card I've installed VMware ESXi on fails? I have a real simple question. We deal with this constantly and a ...

1 answer

Tough mudder “Electroshock therapy” obstacle

The Tough mudder is an obstacle race where some obstacles test someone's mental grit. One of the obstacles is the "Electroshock therapy" where someone has to run through dangling wires that carry ...

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Arduino sends different numbers over serial to Raspberry Pi than Linux/Mac

I've set up an arduino uno to monitor room temperature and communicate this to my Raspberry Pi (old model B) over USB (2.0 cable) using pySerial to read the data on the raspberry pi side. The code I ...

3 answers

Parsing serial string data into an array (VVVV to Arduino)

I'm currently working on an arduino project at University. Basically what I am trying to do is send a string of data from VVVV to arduino, however I need to parse the data into an array and I have ...

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Can I electrify a pin by applying current in its base?

I imagine electric circuits as loops. So I wonder, if it is possible to electrify a pin without connecting its two edges, instead only applying current at its base. But I want the current to run ...

1 answers | 8 hours ago by sloupioc on Physics physics.stackexchange.com
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Max voltage for Arduino ATmega328 VCC pin (not raw!)

I am thinking about getting both the Pro Mini 3.3V and the 5V boards. Example (but I may end up going generic, not sure yet) 3.3v: https://www.sparkfun.com/products/11114 5v: ...

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arduino web client, turn on led with php

I need help. Now the mo Arduino connects to the web server . On the webserver I would there were a .php page that switches on and off an LED . Unfortunately I do not know how to write a .php page and ...

1 answers | 8 hours ago by wolfphp22 on Stack Overflow stackoverflow.com
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Directly connecting two Arduino Yun boards to each other

I am trying to connect two Arduino Yun boards to each other via WIFI (make one board control a pin on the other board an vice versa) and I am having trouble making it work the way I want to. This is ...

2 answers | 8 hours ago by klu on Stack Overflow stackoverflow.com
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Can´t get 8-bit shift register working (CD4014BE)

I can't seem to get my 8-bit shift register working. It's the CD4014BE. The datasheet can be found here. I've confirmed that the clock (pin 2) is ticking and the input (pin 4) is continuously ...

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Why is the voltage of a battery equal to the emf?

We know that there is an electric field inside the battery that works against the moving electrons of a circuit. But there is also the chemical force of the battery that at some point become equal. ...

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File transfer between two gsm modem

I'm wanting to build a system that will store value on a SD card to form .CSV file , that this is not a problem. There will be about 1000 value recorded daily.I'm wanting to send this values to a pc ...

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How to flash boot partition on BBB?

I am trying to restore a bricked BBB device. Booting Debian from the SD card works fine (thanks to http://thethingsystem.com/dev/Bootstrapping-the-BeagleBone-Black-with-Debian.html ). Once the device ...

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Proper POST request to stream data to plotly from Arduino

I'm using an ESP8266 module in order push sensory data online. I set it up for thingspeak and used a simple GET request to send the values. Now I was trying to replicate the process with plotly data ...

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ESP8266 Send Data To a Website bad request

I want to send some text to Apache Server, but i get some errors I'm a newbie in ESP2866. I can't find the reasons. I received: "400 Bad request".......Request header field is missing ':' ...

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Serial Issues with Arduino Micro with ESP8266 WIFI Module

I have an Arduino Micro connected to an ESP8266 WIFI module. I get all sort of buggy issues with the two Serial connections: text goes missing and general code gremlins. When I'm setting up my HTTP ...

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Unable to communicate with ESP8266 via Arduino Uno

I recently bought an ESP8266 (ESP-01, 1M) yet I have been unsuccessful in making it respond at all. I have attempted to communicate with it using an Arduino Uno running the built-in BareMinimum ...

1 answer

NodeMCU ESP8266 GET request response

I'm trying to push data to Thingspeak from my Arduino via ESP8266 with NodeMCU firmware. I'm successfully sending and posting to Thingspeak, but occasionally a data point will be missed. I want to ...

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esp8266 programme memory corruption

I programmed arduino sketch direct to ESP8266, then my code works fine. When I remove USB to power off the board, and then power it up again and inserting USB, my code is not working. It seems like ...

1 answers | 12 hours ago by Satya Sankar on Stack Overflow stackoverflow.com
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ESP8266 and Arduino Interfacing

I have connected Arduino with ESP8266 with Arduino pin 2 connected to ESP's Tx Arduino pin 3 connected to ESP's Rx via Voltage Divider Arduino GND connected to ESP's GND Arduino 3v3 connected to ...

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ESP8266 gives garbage using Arduino IDE

I am using ESP8266 board connected to Arduino Nano using this Video. But every time I switch on the board, I get garbage values like this "¤HlzGà". It changes each time I switch on and off. I tried ...

1 answer

Writing to Flash memory with Arduino Mega

I have just bought a 4Mbit flash memory chip. But I cannot figure out how to use it with the Arduino Uno or Mega. Can someone show me how to hook it up and use it.

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Controlling electric power steering using an Arduino to emulate torque sensor

I am trying to control an electric power steering rack with an Arduino. To do this I need to "trick" the EPS module that there is torque being applied when there really isn't. On the rack there are ...

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Controlling 20 meter RGB LED strips via APP

I am designing a solution where I can control around 20 meters of multicolour LED Strips in room via a PC/Windows or WEB application probably using Arduino. The application should give the RGB value ...

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Trouble in sending arduino sensor data to mysql databse via python script

I am using DHT11 humidity sensor, Dallas18B20 temperature sensor,reed switch and hole effect sensor with arduino. I inserted two sensor data(humidity and temperature) into database successfully.But ...

2 answers

Magnet dimensions for 3-phase permanent generator

I'm making a 3-phase permenant generator. According to Faraday's law, the emf produced is negative number of turns times the change in magnetic flux over the change in time. If it is only the CHANGE ...

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Uploading HEX file to Arduino

I have an Arduino Nano board and I use mikroPascal as my development IDE For uploading I currently use XLoader, but it is not possible to use that software with commandline parameters so I can ...

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Arduino Uno output pin at 100 Hz and 50% duty cycle

I just need to set an output pin on Arduino Uno at 100 Hz and 50 % duty cycle. I searched on the Internet and did not find any relevant answer for me. Is here anyone wishing to write some line of code ...

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