Category Archives: Arduino

Announcing OpenSprinkler Bee (OSBee) Arduino Shield v1.0

Another open source project from RaysHobby, the OpenSprinkler Bee (OSBee) shield: OpenSprinkler Bee (OSBee) shield is an open-source Arduino shield for battery-operated (latching solenoid) sprinkler valves. It’s useful for gardening, lawn watering, flower and plant irrigation, and other watering applications. OSBee has a built-in boost converter and H-bridges to control up to four independent valves. […]

minDUINO v1.5, a small footprint, educational Arduino clone

Steve Smith G0TDJ  of ProjectAVR writes: The minDUINO is designed to be easy to assemble, so it is a two layer through-hole design, not SMD. It has headers for FTDI, ISCP and port breakouts. Another project I designed was VAYU-NTX, a High Altitude Balloon Tracker. As expansion for this, I designed two small daughter boards for […]

Build an Arduino based sonic pest repeller

Just in time for Summer, here’s a design for a sonic pest repeller. Carla Schroder developed this project which uses an Arduino Uno along with the WAVE shield and a Maxbotix ultrasonic rangefinder. This simple yet reportedly effective design senses critters nearing your garden plot and plays sound files (stored on an SD card) intended […]

Chipstomp assembly – Analogue side

We previously covered Catmacey’s Chipstomp digital side. Now he built the Chipstomp’s analogue side: It’s done.  I’ve assembled the analogue side of the Chipstomp and finally have a fully working device.  There were no errors to fix this time which was a nice surprise.  Just lots of fiddly 0805 surface mount components to place. Check out the video after […]

LCD clock version 2 – part II

Here’s an update on Kevin Rye’s LCD clock we covered previously.  Source files are available here, for direct download LCD-Clock-V2-Source.zip: Once all the components and headers were soldered in, I attached my Arduino and configured it as an ISP. I then burned the bootloader for an Arduino Uno. I then connected my FTDI programmer and uploaded the blink […]

EGYDuino – Arduino compatible board

Dr. Ayman Shalaby over at Electronics Lab has posted an article describing EGYDuino, an Arduino compatible board that can be build using home process: EGYDuino is a DIY Arduino clone made on a single sided PCB board. It’s simple and cheap to build using home PCB fabrication methods and it’s 100% compatible with Arduino.

Poor maker’s IR receiver #2

As promised, the AnalysIR crew has released their design for a simple IR receiver, this time using the Arduino. Our recent post about the silver bullet IR receiver proved very popular and we promised that we would follow-up with another variant of the poor maker’s Infrared receiver. This time we are using an IR LED […]

Temperature compensation for an Arduino ultrasonic distance sensor

Sverre Holm writes: Ultrasonic distance sensors can find the range out to 2-4 meters and are popular in e.g. robotics. Here I look at how the accuracy can be improved by compensating for the variation of speed of sound with temperature. It actually varies quite a lot in air and around 0 C it is: […]

32 channel mains lamp controller

Jaanus Kalde made this 32 channel light dimmer project, that is available at Github: I needed a computer controllable 32 channel light dimmer for an art installation. After looking around a bit I found out that there isn’t even a Arduino shield for the work. So I made a quick 4 channel stackable board to control lights. The […]

BlueMatrix – Bluetooth controlled LED matrix

Luca Dentella has published his latest project: BlueMatrix. It’s a portable LED matrix display based on Arduino Uno, powered by a Lipo battery and connected via Bluetooth to a personal computer or an Android smartphone. I’ve also developed the controlling app for Android, available on Google’s PlayStore. All the schematics, source files, inkscape files for […]

Execute Arduino code in a PIC MCU using MPLAB IDE

Want to run Arduino code in a PIC MCU? “Here’s an approach that enables Arduino code to be configured for execution with the Microchip Technology PIC32MX250F128B small-outline 32-bit microcontroller. It uses the Microchip Technology MPLAB X IDE and MPLAB XC32 C Compiler and the Microchip Technology Microstick II programmer/debugger.” Via Circuit Cellar.

An Arduino library for MCP3903 A/D converter

Kerry Wong writes: MCP3903 is a six channel Delta-Sigma A/D converter. It features six synchronous sampling differential channels which can be programmed to sample between 16 bit and 24 bit accuracy, the gain for each channel can also be programmatically set from 1 up to 32. It also has an internal low tempco (5ppm/°C) voltage […]

A Silverlink clone to rescue pre-USB calculators

Geekboy1011 over at the Cemetech forum has been working on a Silverlink clone software for the Arduino Leonardo (ATmega32U4) microcontroller development board: Texas Instruments’ Silverlink is a product to connect calculators without USB ports (namely everything except the TI-84 Plus series and the TI-89 Titanium) to computers’ USB ports to transfer files, screenshots, and operating systems.

Modify an off-the-shelf CP2102 module as an Arduino programmer

Kerry D. Wong wrote an article on how to modify a CP2102 module as an Arduino programmer: To make it work with the Arduino bootloader, one easy approach is to disconnect the RST header pin from CP2102 pin 9 and connect it to the DTR pin (pin 28) instead. While in the Arduino schematics, the […]