Category Archives: Arduino

Open guitar pedal

The pedalSHIELD Arduino guitar pedal by Electrosmash: The shield has three parts: The Input Stage or Preamp: Amplifies the guitar input signal and sends it to the Arduino microcontroller to be processed. Arduino Board: It does all the Digital Signal Processing (DSP) modifying the signal and adding the effect (delay, echo, distortion, volume…). The Output Stage: […]

Modified Arduino DS1307RTC library that also works for MCP7940N

Ray writes, “When your project needs a real-time clock (RTC), don’t you hate that the popular DS1307 costs several dollars? I recently came across Microchip’s MCP7940N, which is an inexpensive alternative to DS1307. On the hardware side it is pretty much a drop-in replacement (although Microchip recommends adding several extra elements). The software requires a […]

Arduino and SIM900 GSM Modules tutorial

John Boxall over at Tronixstuff has a series of Arduino tutorials.  This chapter fifty-five of a series will show you how to use the SIM900 GSM modules with Arduino: The goal of this tutorial is to illustrate various methods of interaction between an Arduino Uno (or compatible) and the GSM cellular network using a SIM900 GSM […]

Convert optical mouse into Arduino web cam

Franci has written this tutorial describing the process used to convert a mouse into an Arduino web cam. In addition to the Arduino, all you need are an Ethernet shield, an optical mouse with ADNS-5020 sensor and a 10K ohm resistor. “An optical mouse uses a small camera that records the surface to calculate movements […]

A method of applying a precision reference voltage to an Arduino AREF pin, without accidentally blowing up the processor

Telford Dorr shared a tutorial on how to apply a precision voltage to the AtMega Aref pin without accidentally blowing up the processor. There’s a better way: feed the Aref pin resistor with an op-amp, and connect the op-amp negative feedback input directly to Aref. The op-amp will generate whatever output voltage is needed (within its […]

Light up your XMAS from your Smartphone

Boris of Open Electronics writes: This post is about a light animation game that can light up your Christmas. There’s Bluetooth, Android and audio files: a perfect festive mashup. A spectrum analyzer will help us color the winter festivities. Every year at Christmas we always want to try something new for lighting up our decorations: […]

IR remote control station for SensoDuino

TechBitar writes, “This hack  intercepts sensors data from an Android phone, sends data to a Bluetooth HC-05 module to Arduino which then translates it into an IR remote control code to trigger actions such as lower/increase TV volume, increase/decrease heater temperature, and any action that can be triggered with about 12 sensors found in Android […]

SquareWear 2.0 — an open source wearable Arduino

SquareWear 2.0, an open source wearable Arduino by Rayshobby: This is SquareWear 2.0, an open-source, wearable Arduino microcontroller board. This version measures 1.7″x1.7″ in size, and has built-in LIR2032 rechargeable Lithium coin battery. It also has a number of integrated components (see below). It is designed to be sewable: you can stich conductive threads through the […]

Building a self balancing bot

Bajdi documented his Arduino self balancing bot build: For the electronics I used one of my own PCB creations, a Bajduino of course  It’s just a small (50x50mm) break out board for an ATmega328. I’m running the ATmega @ 16MHz and 3.3V. It’s out of spec according to the datasheet but it works… I also needed an IMU […]

Arduino Astronomical clock for automatic light control

Here’s a project log covering the build of  an Arduino Astronomical clock for automatic light control by Paulo Oliveira: My objective with this project was to build a system that, given my latitude and longitude coordinates and the current time/day of the year, automatically calculates the sunrise and sunset times, controlling the lights accordingly. There are of […]

Reflow toaster oven using an Arduino

Ray Wang writes, “Hi, I recently built a reflow toaster oven using an Arduino. I know it’s pretty standard stuff, but my version has an automatic oven door opener (using a servo) and circulation fan to speed up the cooling time, and remote notification using an RF transmitter.” You can find the project details on […]

Realtime color tracking with Arduino and OpenMV

In a previous post we featured OpenMV, an inexpensive open-source tiny machine vision module based on an STM32F4 ARM Cortex-M4 micro and OV9650 sensor. Ibrahim has posted an update on this project, including links to the schematic and source code. The above video shows the module tracking a ball with an Arduino. Via the contact […]

LED cube spectrum analyzer project

John Boxall over at Tronixstuff posted a step by step guide on building a LED cube spectrum analyzer: A few weeks ago I was asked about creating a musical-effect display with an RGB LED cube kit from our friends over at Freetronics, and with a little work this was certainly possible using the MSGEQ7 spectrum analyzer IC. In […]

Arduino Neurosky brain wave (EEG) library

Users of the Neurosky EEG brainwave sensor devices will be glad to learn that there’s an Arduino library for reading data. “Brain is an Arduino Library for parsing data from Neurosky-based EEG headsets. Tested units include the Star Wars Force Trainer and Mattel MindFlex. It’s designed to make it simple to send out an ASCII […]

RadioduinoWRT – a do it yourself webradio

Raffael Herrmann wrote in to let us know about his latest project the RadioduinoWRT – a do it yourself webradio: In the last weeks I built a webradio by myself. It made from an Arduino, an hacked TP-Link WR703N router and some interface parts. It’s fitted into a beautiful Yamaha enclosing and supports the original Yamaha interface, […]