[RPi] MeARM

組裝就花了一些時間，再看看怎麼結合吧
https://www.instructables.com/id/MeArm-Robot-Arm-Your-Robot-V10/
https://learn.mime.co.uk/assets/docs/control-your-mearm-from-arduino/MeArm_v1.0_Manual_for_Arduino_v1.0.pdf

如果使用的是 Adafruit 的 PWM HAT，可以參考這篇作法
https://learn.adafruit.com/adafruit-16-channel-pwm-servo-hat-for-raspberry-pi?view=all