The 35 laser modules are arrayed in a 5 x 7 matrix, slotted into basic PCB board. Each is wired up to a microcontroller – in this case a PIC16F722, though an Arduino would do nicely too – via ...

The YouTube channel DIY Builder has published and created a DIY Arduino laser engraver which is powered by an Arduino Nano development board and is fitted with a 200-250mW 650nm Laser Module ...