In this Arduino-based project, we will build a lamp with multiple light displays: color sequencer, dimming light, color chaser, firelight – all selected by a touch bar on the circuit board.
All the functions are done in software, including the touch sensor, which is a unique feature.
We will be going the minimalist way for this project, filling the board with just a microchip, the LEDs, a handful of resistors and some capacitors, all for under $10, along with the necessary connecting hardware.
The circuit will be using 3 RGB LEDs. These are common-anode Piranha type available here and contains three LEDs within its body. Each color will need a single dropping resistor (220-ohm for green and blue and 330-ohm for Red). We can also add a small LED with a 1k-ohm as an indicator.
The IC we are using is an ATMega-328 microchip, available for about $5 here You will also need a 16Mhz resonator for about 35c, also available at the same site.
The development and testing of the software is done using the Arduino system, so a suitable ‘host’ is necessary. I’ve used an Arduino ‘Nano’, a Boarduino and a RBBB board and they all work fine.
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