HoloCade Universal Shield
About the HoloCade Universal Shield
HoloCade Universal Shield is an open source ESP32 PCB design by scifiuiguy, published on GitHub. It is a 2-layer board measuring 118 × 84.5 mm, with 71 components from 38 distinct parts.
Its main chip is the ESP32-S3-2x22, from the ESP32 family. Other key parts include the LM2576HVS-5, LAN8720A and ADM3057ExRW. By type, the board carries 18 capacitors, 13 diodes, 12 connectors, 12 resistors, 9 switches and 4 ICs.
It belongs with the iot & wireless and dev boards & breakouts designs in this gallery.
From the project
The PCB designs for all shield templates for HoloCade-compatible embedded systems (ESP, Arduino, Pi, STM, Jetson, etc.)
Plug-n-Play Embedded Systems - an Absolute Necessity for Next-Level LBE:
The HoloCade Universal Shield ("HCUS" or "Uni-Shield") is a multi-platform ECU that provides unified connectivity and control for all HoloCade firmware applications. But what is it for? What does it do? ECU? What the heck is even that?
It's sort of like the little computer hidden behind the dashboard in your car. It's not a supercomputer... quite the opposite. It costs a few dollars to buy a few dev boards on Amazon and deploy them as ECUs by flashing programs onto them. If you've done IoT with Arduino, ESP32, or…
Main components on the HoloCade Universal Shield
HoloCade Universal Shield bill of materials (BOM)
71 components, 38 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | LM2576HVS-5 | TO-263-5_TabPin3 | U1 |
| 1 | ESP32-S3-2x22 | ESP32-S3_2x22_Header_v3 | U2 |
| 1 | LAN8720A | VQFN-24-1EP_4x4mm_P0.5mm_EP2.5x2.5mm_ThermalVias | U3 |
| 1 | ADM3057ExRW | SOIC-20W_7.5x12.8mm_P1.27mm | U4 |
| 1 | IRF9540N | TO-220-3_Vertical | Q1 |
| 1 | IRLZ44N | TO-220-3_Vertical | Q2 |
| 1 | 25MHz | Crystal_SMD_3225-4Pin_3.2x2.5mm | Y1 |
| 8 | MTJ-883X1 | CONN_MTJ-883X1_ADM | J1, J2, J3, J4, J5, J6, J7, J8 |
| 1 | Barrel_Jack | BarrelJack_Kycon_KLDX-0202-xC_Horizontal | J9 |
| 1 | CAN BUS | JST_XH_B3B-XH-A_1x03_P2.50mm_Vertical | J10 |
| 1 | 2-Pin Fan | JST_XH_B2B-XH-AM_1x02_P2.50mm_Vertical | J11 |
| 1 | UART_Debug_Header | PinHeader_1x04_P2.54mm_Vertical | J12 |
| 1 | SW_DIP_x01 | SW_DIP_SPSTx01_Slide_6.7x4.1mm_W6.73mm_P2.54mm_LowProfile_JPin | SW1 |
| 1 | J1_PWR_SW | SW_DIP_SPSTx01_Slide_6.7x4.1mm_W6.73mm_P2.54mm_LowProfile_JPin | SW2 |
| 1 | J2_PWR_SW | SW_DIP_SPSTx01_Slide_6.7x4.1mm_W6.73mm_P2.54mm_LowProfile_JPin | SW3 |
| 1 | J3_PWR_SW | SW_DIP_SPSTx01_Slide_6.7x4.1mm_W6.73mm_P2.54mm_LowProfile_JPin | SW4 |
| 1 | J4_PWR_SW | SW_DIP_SPSTx01_Slide_6.7x4.1mm_W6.73mm_P2.54mm_LowProfile_JPin | SW5 |
| 1 | J5_PWR_SW | SW_DIP_SPSTx01_Slide_6.7x4.1mm_W6.73mm_P2.54mm_LowProfile_JPin | SW6 |
| 1 | J6_PWR_SW | SW_DIP_SPSTx01_Slide_6.7x4.1mm_W6.73mm_P2.54mm_LowProfile_JPin | SW7 |
| 1 | J7_PWR_SW | SW_DIP_SPSTx01_Slide_6.7x4.1mm_W6.73mm_P2.54mm_LowProfile_JPin | SW8 |
Show 18 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | J8_PWR_SW | SW_DIP_SPSTx01_Slide_6.7x4.1mm_W6.73mm_P2.54mm_LowProfile_JPin | SW9 |
| 8 | MBR735 | TO-220-2_Vertical | D1, D2, D3, D4, D5, D6, D7, D8 |
| 1 | BZX84C12 | SOT-23 | D9 |
| 3 | LED | LED_0805_2012Metric | D10, D11, D12 |
| 1 | SS14 | D_SMA | D13 |
| 11 | 100nF | C_0805_2012Metric | C1, C3, C4, C7, C8, C9, C10, C11 +3 |
| 1 | 10µF | CP_Radial_D6.3mm_P2.50mm | C2 |
| 2 | 10µF | CP_EIA-3216-18_Kemet-A | C5, C6 |
| 2 | 10pF | C_0805_2012Metric | C12, C13 |
| 2 | 4.7µF | CP_EIA-3216-18_Kemet-A | C16, C18 |
| 3 | 10K | R_0805_2012Metric | R1, R8, R11 |
| 1 | 1 kΩ | R_0805_2012Metric | R2 |
| 1 | 326Ω | R_0805_2012Metric | R3 |
| 3 | 270R | R_0805_2012Metric | R4, R5, R6 |
| 1 | 49R9 | R_0805_2012Metric | R7 |
| 1 | 4.7k | R_0805_2012Metric | R9 |
| 1 | 100R | R_0805_2012Metric | R10 |
| 1 | 120R | R_0805_2012Metric | R12 |
HoloCade Universal Shield design files
The KiCad project lives in the scifiuiguy/HoloCade_PCBs repository on GitHub; these links point at the commit this page was built from.
HoloCade Universal Shield: common questions
What microcontroller does the HoloCade Universal Shield use?
The HoloCade Universal Shield is built around the ESP32-S3-2x22, from the ESP32 family.
How big is the HoloCade Universal Shield?
The HoloCade Universal Shield measures 118 × 84.5 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the HoloCade Universal Shield?
71 components, from 38 distinct parts. The full bill of materials is listed on this page.
Where can I download the HoloCade Universal Shield design files?
From the scifiuiguy/HoloCade_PCBs 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 Universal Shield design in my own project?
The repository has no license, so all rights stay with scifiuiguy. Use it as a reference, and ask the author before reusing the design.
Can I test firmware for the HoloCade Universal 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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