Laser controller board from k4 Bluetooth 3000mW Laser engraving machine from aliexpress.
Is sold as "3000mw CNC Bluetooth Laser Engraver DIY Logo Mark Printer Cutter Laser Engraving Machine Woodworking 80x80mm Engraving Ranges"
I used my engraver via the Android app. (this worked great) But when I installed the windows software and connected the engraver to my USB.
The machine stopped working permanently. The laser went off and the big fan also stopped. I think my SPI flash got corrupted... I need to restore a backup.
I think this device is some how GRBL32 compatible?... let's see...
SKUA20539-20492184 (Code on the box)
U7 = STM32F103c8t6
U13 = 25Q32JVS10 (4MBytes of Winbond SPI flash)
U1-2 = ATD5988 (Stepper drivers)
U3 = CH340C (USB uart ttl)
P5 = programmer USB??
P2 and P4 = Laser+minifan port
P3 = Big Fan port
P6 = power port
P1 = USB port
B1-5 = Buttons BLE1=some bluetooth module?
List of bluepill projects: https://onstep.groups.io/g/main/wiki/6408 https://github.com/pvico/grbl32 https://github.com/djabi/grbl_stm32f103c8 https://github.com/Alfrederson/cncstm32