M5Stack User Meeting#5 -pcb design for cheap 3d printer-Masawo Yamazaki
?
This document discusses the design of a case for an expansion module for the M5Stack. It describes challenges with 3D printing thin walls and corners of the original PCB design. The designer modified the PCB outline, rounding corners and moving parts inward to make it easier to 3D print. Test prints on various 3D printers showed the modified design worked well. The document also compares costs of different production methods like 3D printing services versus owning a 3D printer.
The document discusses expansion boards Masawo Yamazaki has designed for the M5Stack, including a 2-channel motor driver shield using an L293D chip, a 10-channel servo shield using a PCA9685 chip, and a USB host shield using a MAX3421E chip. Schematics and demos of the boards controlling motors, servos, and Bluetooth/Wii controllers via USB are provided. Additional information on purchasing the USB host shield is also given.
4. こんなボードを作っています
↑
Uno shaped ESP32 breakout board
https://www.switch-
science.com/catalog/3456/
↑
IR & Servo shield for Arduino Pro Mini USB Host Shield for Arduino Pro Mini
Web: https://thousandiy.wordpress.com/
Facebook: https://www.facebook.com/thousandiy/
21. USH Host Shield for M5Stack
? USB Host Chip: MAX3421E (MAXIM Integrated)
LiPo Battery Connector
Power SW
USB STD-A connector
The revised board was finished and it was
confirmed that one operation was completed.
USB Host Shield Library : https://github.com/felis/USB_Host_Shield_2.0
27. 2ch Motor Driver Shield for M5Stack
?H-Bridge Driver: L293D (TI compatible)
Motor Power Select
Internal or External
LiPo Battery
Connector
Power SW
External Battery
connector
Motor connector
28. 2ch Motor Driver Shield for M5Stack
Use Strapping pin
for Enable