The Arduino system offers an easy and open-source method for programming microcontrollers. Normally this means using a serial cable or USB cable attached directly to the microcontroller project. But what if your project is floating in a weather balloon, glued to the bottom of a swimming pool or baked into a loaf of bread? It would be great to upload code changes wirelessly, and even greater if you could do it from several kilometers away.
The following example demonstrates how to build a complete wireless solution for uploading code to a remote Arduino microcontroller using a couple of XBee radios, and a handy function for accomplishing wireless resets.
Arduino Wirelessly Programming System Based on XBee: [Link]
The project it’s based on a nice little 3-axis accelerometer from STMicroelectronics with a SPI bus, which makes it handy for interfacing in microcontroller style applications. This device could be interfaced with an AVR, but the author chose to interface it with the Arduino, since it’s pretty easy to get up and running in that environment.
LIS3LV02DQ Triple Axis Accelerometer: [Link]
This software allows you to get a visual representation of an analog signal using Arduino and Processing. The resolution is 10 bits so this is not like a real oscilloscope but it is still pretty useful. It works by sending values read from the Arduino board (pin 0) to Processing through serial communication.
Although i would recomend getting a real oscilloscope because it works better and has better resolution, this project could also be usefull when you don’t have an oscilloscope around and you’re in need of one. Also you could build it to experiment and have fun.
Arduino Oscilloscope: [Link]
This lets you write and read byte values from an sd card. It’s very simple to use. The schematic uses some resistors in a voltage divider to drop down the arduino 5v logic to the sd cards 3v3 logic. So all outgoing signals from the arduino are dropped to 3v3. Incoming signals to the arduino are fine because 3v3 is above logic 1 for arduino. The 3v3 voltage supply from the decimelia was used to supply power to the sd card.
Interfacing SD Card With Arduino: [Link]
Daniel build this clock after having to chose from a watching a movie or working on a project. Obviously he and hi’s friend chose to make the clock so it wassn’t long until the LED’s started to light up. The clock code is based on the open-source-arduino-clock by Rob Faludi. Daniel made many changes, but the time counting the basically the same. So if you want to make another kind of clock, I suggest you to take a look on that code.
Arduino Based Binary Clock: [Link]
