Kerry Wong writes: One way to extend the resolution of a digital-to-analog converter (DAC) is by employing a sigma-delta converter in software. The main disadvantage of such approach is the slow speed. Alternatively, we can use some extra hardware to extend the usable resolution of a DAC. In this post, I will illustrate one such […]
Category Archives: Arduino
DIY Arduino SVG plotter
Here’s a DIY Arduino SVG plotter by Junk+Arduino: Junk (the hardware): Olde Epson printer: frame, two stepper motors, motor driver circuitry CD player: The laser head moving mechanism Desktop compy PSU as a 5V power supply One H-bridge – SN754410NE Some resistors Bits of wire and a small breadboard Arduino uno, computer and pen Via Hacked […]
Colour sensor project
Iamzxlee has written an article detailing his colour sensor project: Basically, the sensor consists of three LEDs and Light Dependent Resistor (LDR). The LDR will detect the colour and display it to another RGB LED. Besides display it on the RGB LED, the colour will also display on PC. RGB LED is commonly used in display colours […]
K4S, a keyboard for Arduino to use with Scratch
Jechavarria writes: Here’s my las project, in collaboration with the blog www.desafioecuador.org. It’s a keyboard board to mount in Arduino UNO board that allows work with S4A, a mod of Scratch to use with Arduino. I hope you like it! Via the forum.
Remote flower watering project
Lucy Matchett, Nicole Yi Messier, and Joselyn McDonald (Snax_and_Macs) made a remote flower-watering device so you can water your loved ones’ plants when you water your own. We used Arduinos, a photoresistor, a servo, Arduino and Processing sketches, Spacebrew, and a little elbow grease to put it all together. Via Hacked Gadgets.
LuxBlaster: Arduino controlled light sensor/response device
Techbitar writes, LuxBlaster is an Arduino gizmo that detects and tracks the most intense light source then sends back an intense light in the same direction. Beware, rude drivers. The LuxBlaster is coming!! When you drive at night, every once in a while a car will approach you from behind with its annoying high beam […]
STM32 Nucleo development series
Alexander Czajor from ST writes: ST has just released the STM32 Nucleo. This is a series of development tools that allow to quickly evaluate any STM32. These boards are extensible with Arduino, and they are supported by mbed. This makes them a good basis for any embedded community. The main idea: – A lean board […]
Arduino network uptime monitor with Twitter updates
Steve from Hackshed.co.uk has posted project details on their Arduino network monitor. They use an Arduino, an Arduino Ethernet Shield, the Twitter Library and the ICMP Ping Library by Blake F to monitor the network and send updates via Twitter. He reports, “It was actually surprisingly easy; we had the Twitter posting code from the […]
How to: compiling Arduino Caterina with new VID/PID
Compiling the Arduino Leonardo bootloader (aka Caterina) is a required step in making your own Arduino Leonardo-compatible board available to others. Steven Casagrande has written this post detailing what you need to do in order to make your derivative board valid for sale. Via the contact form.
RetroWatch, an open source smart watch project using Arduino and Android
Here is a very nice build of a DIY smart watch based on Arduino and Android by godstale. Check it out. But here is a simple way to evaluate smart watch’s future on your own. Make it! With Arduino micro-processor and Android, I made a simple smart watch and named it “Retro Watch“. You can […]
Build a robotic air-hockey opponent out of RepRap parts
Jose Julio likes to tinker with robotics; his daughter likes air hockey. From these mutual interests, an Arduino and a handful of surplus parts from a RepRap 3D printer, Jose devised an air hockey game with a robotic opponent. “The project is based on standard RepRap 3D printer parts : NEMA17 stepper motors, drivers, Arduino […]
Ajax webapp for uploading Arduino sketches over network
Luca Dentella has developed a webapp providing another way to upload sketches to Arduino Yun. The project allows you to upload a new sketch using a protected web page, easily accessible also over the Internet. It’s based on Ajax and can be found on Luca’s website. Via the contact form.
Arduino plant mister
In this video Johnny Klaus demonstrates using a car door lock motor and an Arduino to mist his plants: A little project I’m working on. Using a car door lock motor and arduino with relay because it will be misting the plant every hour or so, and the 12v transformer doesn’t have to be constantly on. Via […]
A new Wi-Fi Shield to connect your Arduino to the internet
Boris Landoni from Open Electronics writes about a new open source Wi-Fi Shield for Arduino: Despite the proliferation of hardware to connect Arduino with the web, and especially despite YUN, we considered useful to design and propose a new WiFi shield for Arduino, which replaces the one already presented. This time we indeed added an interface processor […]
Arduino libraries uploaded to GitHub
Kerry Wong writes: Over the years I have created quite a few libraries for Arduino. I finally uploaded them to GitHub a couple of days ago so that they are now all at one place and are easier to find. Here’s a list of the corresponding posts: MCP2210 Library — Reference Interfacing DS7505 AD7705/AD7706 Library […]
Mini 7-Segment clock V2, part II
Kevin Rye writes about his Mini 7-Segment clock V2 project, we wrote about it previously: Now for the moment of truth. I crossed my fingers and connected a battery pack. Woo hoo! It works! I love that feeling you get when you spend weeks working on a project, it all comes together in the end and it […]
DEFCON 21: Arduino based vehicle tuning device
In this presentation from DEFCON21, Albert Garcia Illera and Javier Vazquez Vidal discuss the development, Houston TX enclosed auto transport and operation of an Arduino based device for controlling automotive functions in 2010 and newer model vehicles that use the K-Line protocol (although we’re told it could easily be modified with newer protocols.) Additionally they […]
Arduino Bot tweets temp/humidity updates
While testing out various sensors, Steve from Hackshed.co.uk thought it would be fun to make the Arduino actually tweet out what the current status of our office is. “The Arduino records the current, minimum, maximum and temperature change as well as humidity and then sends out a tweet to a Twitter account with an update […]
Night light 2.0, part II
Kevin Rye built this Night Light 2.0: And there it is. Definitely not my best work, but it’ll do. I just wanted to use up that last PCB left over from the Tesseract build. I guess it was better to use the PCB for something rather than have it sitting in a parts drawer. I imagined the entire […]
SquareWear Mini chainable color LED matrix and animation design tool
Ray Wang writes about his recently completed project, the SquareWear Mini with All-New Chainable Color LED Matrix, and an Interactive Animation Design Tool. The goal is to make standalone programmable color display gadgets. The LED matrix is chainable and can be seamlessly extended in both X and Y directions. The SquareWear Mini is essentially an […]