Minimum electronic level (based on ATMEGA328p and MPU6050)

The main process is to use arduino to receive the attitude information of gy521, and then print it on the OLED screen. It also comes with a calibration button. Press it to return the current angle to zero, and store it in the epprom for direct use next time. The main structure is a sandwich structure, which is divided into upper and lower layers of PCB, connected by copper pillars and pin headers.

The main integrated modules on the upper layer include 0.91-inch 14pin OLED, OLED driver board, atmega328p, and the lower layer mainly integrates lithium battery charge and discharge, gy521, mt3608 5v boost, ams1117 3.3v step-down, and ch340c serial port chip (there is no space on the upper layer, use row The pin link is the atmega328p burning program, and the upper layer has a reserved isp interface.

The schematic diagram I drew before is gone, so I drew it again. Please forgive me for any mistakes! The upper and lower floors are connected through M3 studs, which must be brass studs because they need to be conductive! The length is based on individual needs.

I haven’t written the code yet, I will announce it later, Gu Gu Gu