This PCB is an Arduino Mega shield designed primarily for driving servo motors, providing DIY enthusiasts with a comprehensive development shield. It greatly enhances development efficiency while allowing for easy and organized wiring of all peripheral components to the board.
To help users get started quickly, please refer to the following pin mapping for connections. Below are the shield pins corresponding to the pins on the Arduino Mega2560:
I've fabricated and assembled this PCB, using it in the Hexapod Robot project.
To power 18 RDS3225 servo motors simultaneously while avoiding voltage drop issues, a large 0.6F capacitor was placed at C1, with a relatively smaller 1000µF capacitor placed in parallel at C2.
Capacitors of 100µF, 10µF, and 0.1µF were placed at C3, C4, and C5 respectively, to ensure the stability of power supply for all peripherals. A 1kΩ resistor was placed at R1 and a 2kΩ resistor at R2 to create a voltage divider circuit, which reduces the voltage to around 3.3V for the RX pin of the HC05/06 module. For more details, please refer to the shared Gerber file below.
https://drive.google.com/drive/folders/17j_bDiwszHmci_YNZK1wv7SDB-q9JGdj?usp=sharing