2 layer board of 2.52x0.86 inches (63.91x21.74 mm). description: Autonomous 3 seven-segments display powered by an Atmega328P. features: - small form factor - communication: Serial, I2C, SPI, (bitbanging possible if you want to) - SDM components, soldering by hand is not too difficult. - 5 volts only - Arduino IDE compatible - programmable via ISP by default (or maybe via serial lines with a different bootloader) - crystal 16Mhz, 20MHz (or whatever or internal if you want to) - 2 support holes for 3 mm screws Main part list: 7-segments common cathode led display, ATmega328P, quartz 20MHz, resistors, capacitors. ==> See this [Github][1] for more info! [1]: https://github.com/romain-viollette/SevenSegmentsDisplay