I enjoy both Geocaching and electronics and have made a couple of electronic puzzle caches using an Arduino. My latest creation (with the help of a fellow cacher for the code) is using an Arduino and RFID reader to make a puzzle geocache we call RFIDuino. The GeoCacher takes RFIDuino and has to find 3 […]
RFIDuino – Using an Arduino & RFID Reader to make a puzzle GeoCache Read More »
Open-source hardware? Arduino(tm) is the first name to come to mind! As great as it is, sometimes we need a small microcontroller solution for a project, or a stripped-down version for cost-effectiveness. The Ardweeny is the solution. These small kits are 100% compatible with the Arduino programming environment, are very small, (and unlike the regular
The Ardweeny: the little friend of the Arduino (and how to beef it up) using arduino Read More »
The one wire Digital Temperature Sensor – DS18B20 from Maxim (formerly Dallas) is a great chip for measuring temperature in your projects. Luckily, there is a Dallas Temperature library for the arduino which makes using this sensor very easy. The most recent version of this library can be found at http://www.milesburton.com/?title=Dallas_Temperature_Control_Library We used version 3.6.0
Arduino – One Wire Digital Temperature Sensor – DS18B20 Read More »
Today we’ll expand Arduino’s digital resources thanks to an I2C bus equipped shield and we’ll allow the management of the board via a bluetooth connection RN-42 through an Android systems. All Arduino boards feature a number of digital I/Os. For the simplest projects, such resources are usually more than sufficient, but in those where they
An I²C Bus powered Arduino IO Expander Board controlled via Bluetooth and Android Read More »
In this tutorial, you’ll learn how to control a high-current DC load such as a DC motor or an incandescent light from a microcontroller. (:toc Table of Contents:) Connect a transistor to the microcontroller The transistor allows you to control a circuit that’s carrying higher current and voltage from the microcontroller. It acts as an
Using a transistor to control high current loads with an Arduino Read More »
ButtonHero is a game made on an Arduino that involves the use of buttons, LEDs, wires, and resistors. In this game, you have to hit the corresponding button to the light that is randomly selected before the light changes. You start with 5 lives and missing or being too slow subtracts one life. The high
ButtonHero using Arduino Read More »
A “fan cart” is a roughly constant-force device used in introductory physics labs. It consists of a fan (usually a model airplane propeller on a brushed DC motor) mounted on top of a low-friction cart. Students use it to pretend they’re learning something about force, acceleration, energy, etc. If you’ve ever taken an introductory physics
Arduino-Controlled Physics Lab Fan-Cart Read More »
In an earlier post I described an Arduino-controlled fan cart. The driver I used was an L293D quad half-H chip, because I had one handy and was out of simpler parts at the time. It’s always bugged me that I was just controlling speed on that cart, since it’s possible to control direction with an
Improved Fan Cart Using Arduino Read More »
Thanks to Will Greiman’s Fat16 library for the Arduino, I finally got a useful version of this datalogger working! Here’s the schematic: And here’s the code. The code is highly configurable: it can save raw A/D values or converted values, it allows software-defined gain, it can collect for a set time or until user input,
Arduino datalogging accelerometer with µ-SD storage Read More »
There is no better way to hide a covert device than to stick it inside a larger conspicuous device. That said… Essentially, this is a guide for making a data logging system for use with the breathalyzer microphone. To accomplish this, an Arduino and a Logomatic SD data logger are embedded into an old and
Discreet Data Logger using Arduino Read More »
