All posts in the 'Arduino projects' Category
Posted on 31 Jul 2008
Here is an experiment with an 8×8 LED matrix, driven by a MAX7219 IC, controlled through an Arduino micro-controller board. A custom PCB has been made by Tan from DinoTech to tidy up all the wires connecting the LED matrix and the IC. It comes with a separate 12V power supply, in order not to drain everything from the Arduino board.[more]
Posted on 31 Jul 2008
This is a small autonomous device with Arduino that can detect the presence of people with an ultrasonic sensor. It then proceeds to play an MP3 song with a Yampp Industrial III.[more]
Posted on 31 Jul 2008
These two chips provide an easy way to control either an array of 64 Led’s or up to eight digits made of 7-segment displays with a minimum of electronic components. Besides the chip itself you will need only a single resistor and one or two capacitors. Data is send to the chip using a SPI-compatible protocol using 3 of the digital pins on the arduino. If you want control more than eight 7-segment displays (or more than 64 Led’s) the chips can be cascaded.[more]
Posted on 31 Jul 2008
This is a board for making the Arduino into a portable stand alone music synthesizer. It plugs directly into the Arduino board and provides 25 multiplexed keys (2 full octaves), 4 pots, status LED, reset switch, digital to analog converter IC, and a RCA audio jack. The Arduino board with its powerful AVR processor is more than adequate for a wide range of sound synthesis techniques. [more]
Posted on 31 Jul 2008
The control consists of four potentiometers, one each for frequency, duration, tempo, and volume. The first three are simple 100K linear pots wired as voltage dividers. The fourth is a 100k audio taper wired in the traditional volume circuit. The switches for each of the slots are simple momentary SPST devices and another is added for the start stop function. A central red LED is wired in as a tempo indicator.[more]
