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HoloCade Child Shield

scifiuiguy·HoloCade_Unreal·FirmwareExamples/PCBs/HoloCade_Child_Shield/HoloCade_Child_Shield.kicad_pcb

HoloCade Child Shield layout, top view — open source ESP32 board by scifiuiguy
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About the HoloCade Child Shield

HoloCade Child Shield is an open source ESP32 PCB design by scifiuiguy, published on GitHub under the MIT license. It is a 2-layer board measuring 94.1 × 36.7 mm, with 26 components from 16 distinct parts.

Its main chip is the ESP32-S3-2x22, from the ESP32 family. Other key parts include the LAN8720A. By type, the board carries 8 capacitors, 6 resistors, 4 connectors, 4 diodes, 2 ICs and 1 crystal.

It belongs with the dev boards & breakouts, iot & wireless and robotics & motion designs in this gallery.

From the project

HoloCade SDK for Unreal Engine - designed to streamline deployment of professional-grade multiplayer VR/AR/AI/Robotic LBE in venues using immersive theater actors, standardized large hydraulics for motion and haptics, embedded systems for button input and small haptic feedback with vibrators and kickers, & AV OSC for lighting and sound

The Child Shield is a simplified derivative of the Universal Shield (HCUS). It keeps the same ESP32-S3 parent ECU pin map and Ethernet PHY but reduces the aux bus to one RJ45 port and drops CAN entirely. The goal is to provide a tiny, inexpensive parent/child hybrid board for installations that only need a single downstream device or a dedicated “mini HCUS” inside a prop or remote enclosure.

HoloCade Child Shield, from the project README
From the project README

Main components on the HoloCade Child Shield

ESP32-S3-2x22LAN8720A

HoloCade Child Shield bill of materials (BOM)

26 components, 16 distinct parts.

QtyPartRefs
1
ESP32-S3-2x22
U2
1
LAN8720A
U3
1
25MHz
Y1
1
MTJ-883X1
J1
2
Conn_01x22_Pin
J2, J3
1
UART_Debug_Header
J12
1
J1_PWR_SW
SW2
1
MBR735
D1
3
LED
D10, D11, D12
1
10µF
C6
5
100nF
C7, C8, C9, C10, C11
2
10pF
C12, C13
3
270R
R4, R5, R6
1
49R9
R7
1
10k
R8
1
4.7k
R9

HoloCade Child Shield design files

The KiCad project lives in the scifiuiguy/HoloCade_Unreal repository on GitHub; these links point at the commit this page was built from.

HoloCade Child Shield: common questions

What microcontroller does the HoloCade Child Shield use?

The HoloCade Child Shield is built around the ESP32-S3-2x22, from the ESP32 family.

How big is the HoloCade Child Shield?

The HoloCade Child Shield measures 94.1 × 36.7 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the HoloCade Child Shield?

26 components, from 16 distinct parts. The full bill of materials is listed on this page.

Where can I download the HoloCade Child Shield design files?

From the scifiuiguy/HoloCade_Unreal repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the HoloCade Child Shield design in my own project?

Yes, under the terms of its MIT license, which scifiuiguy chose for the repository.

Can I test firmware for the HoloCade Child Shield without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug ESP32 firmware against it before you order a PCB.

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