Quantity   Component name
1 × Digispark ATTiny85-based Arduino-compatible board
1 × 5V step-up voltage regulator
4 × High-power IR LED
4 × PN2222 Transistor
1 × Momentary push-button <a target="_blank" rel="noopener noreferrer" href="http://www.adafruit.com/products/560?gclid=CIDg_ambusUCFVYXHwodXhgAjg">http://www.adafruit.com/products/560?gclid=CIDg_ambusUCFVYXHwodXhgAjg</a>