RCM-Hardware-BYTE

v2.3

• 1.25 by 1.25 inches, 31.75 by 31.75 millimeters
• 8 motors
• 8 servos
• battery monitoring
• I2C connector on QT PY
• runs on 3-11 volts

Tested with the following types of ESP32 QT Py:

Type of Qt Py	PlatformIO name	link to Adafruit
S3 with 2MB PSRAM	adafruit_qtpy_esp32s3_n4r2	https://www.adafruit.com/product/5700
S3 with 8Mb Flash	adafruit_qtpy_esp32s3_nopsram	https://www.adafruit.com/product/5426
S2	adafruit_qtpy_esp32s2	https://www.adafruit.com/product/5325

Look here for how to program it: https://github.com/RCMgames/RCMv2

Look here for more information and examples of robots: https://github.com/rcmgames

Want slightly smaller with a built in IMU? Look at the Nibble

Options for purchasing

• PCBWay link (PCBWay will give me a commission without increasing the price for you). (approximately $90 for 2 boards and manufacturing took a month).
• send the gerbers, bill of materials, and ComponentPlacement files to a PCB manufacturer of your choice (details you may be asked for: min hole 0.25mm, min track/spacing 5/5mil, thickness 1.0mm, 1 oz Cu outer 1.5 oz Cu inner)

Components

Solder by hand to complete the assembly of your boards.

part	links	quantity	notes
RCM BYTE circuit board	options for purchasing	1
ESP32 QT Py	compatible QT Py	1
2x8 female header pins	this or 2 strips of 8	1	for motors
7 female header pins		2	for QT Py
8 male header pins		4	for servos
battery wires	JST RCY OR 9V battery snap	1	Amazon JST RCY
servo buck boost 5v 2A OR replace with a short length of wire	Pololu	2	regulators are needed if you want to supply voltages above or below what servos can accept. There are 2 servo power buses, each with 4 servos.

Acknowledgements

• I would like to thank PCBWay for sponsoring prototyping runs of this project. PCBWay produces very nice boards, supports open source hardware, and gave me great support as I worked on this project. Special thanks to Liam!