This is my first mining rig. It mines DuinoCoin cryptocurrency. This cryptocurrency is adapted to be mined on low-powerful devices such as Arduino, ESP and others. DUCO (DuinoCoin) was made by teenagers from Poland in 2019. Nowadays there are more than 43 000 users worldwide. The whole Duino-Coin project is open-source and I´m very excited to be a part of it! Mine mining rig contains 2x Arduino Uno and 6x Arduino Nano. It cost me about $40 and it already returned in the form of cryptocurrency.