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Toolduino 1.1 Includes Uno Board Image

I’ve released a simple update to Toolduino which includes an image of the Arduino Uno board. Now you can right click anywhere in the tool and choose the board image from a menu. If anyone has good images of other boards, please let me know and I can add...

Hackvision Preview!

Hackvision is the tiny, hackable, Arduino-based video game system. Available in mid-October with a retail price of under $40 USD. UPDATE: Hackvision is now available! Learn all the details! Features: NO Arduino is required. Based on Arduino technology so you can write...

Arduino Breathalyzer: Calibrating the MQ-3 Alcohol Sensor

Difficulty Level = 3 [What’s this?] The MQ-3 is an alcohol gas sensor that is available for about $5 from Sparkfun, Seeed Studio, and others. It’s easy to use and has sparked the imagination of anyone who has dreamed of building their own breathalyzer...

Toolduino

Toolduino is an open-source software tool that you use to test your Arduino circuits. Toolduino communicates with your Arduino through a serial connection so that you can manipulate the pin outputs and read the inputs. Go to the Toolduino page to download it and for...

Speed Trap! A GPS-Based Speeding Alert

Difficulty Level = 9 [What’s this?] This was a fun project I built using a perf-board Arduino with GPS receiver, some LEDs, some long wire, some clever code, and a car! I have this friend that has a speeding problem. So I built this device for my friend so...

Tutorial: Reading a 12-Button Keypad

Difficulty Level = 1 [What’s this?] Most keypads like this are wired so it makes it straightforward to figure out what button is being pressed. With 3 columns and 4 rows of buttons, you only need 7 wires. Typically all the buttons in a column are connected...