US-ring v02
About the US-ring v02 PCB
US-ring v02 is an open source ESP32 PCB design by bohlebots, published on GitHub under the GPL-2.0 license. It is a 2-layer board measuring 81.3 × 81.3 mm, with 24 components from 10 distinct parts.
Its main chip is the ESP32-WROOM-32, from the ESP32 family. Other key parts include the LM1117IMPX-3_3_NOPB and Pfostenstecker_10_2x5. By type, the board carries 13 resistors, 3 ICs, 1 crystal, 1 LED and 1 capacitor.
From the project
open source files of the teams www.bohlebots.de
These are the current KiCad project files of the season 2024. These boards are used by the bohlebots 1vs1 teams and can be used as CoRoSoN Kit boards as well
Main components on the US-ring v02
US-ring v02 bill of materials (BOM)
24 components, 10 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | ESP32-WROOM-32 | WIFIM-SMD_ESP32-WROOM-32-N4 | U1 |
| 1 | LM1117IMPX-3_3_NOPB | SOT-223_L6.5-W3.5-P2.30-LS7.0-BR | U2 |
| 1 | Pfostenstecker_10_2x5 | HDR-TH_10P-P2.54-V-F-R2-C5-S2.54-5 | U3 |
| 1 | MICROMATCH-6 | MICROMATCH-6 | X2 |
| 5 | Pinhead_1x04V | HDR-TH_4P-P2.54-V-M-1 | Komp1, US1, US2, US3, US4 |
| 1 | ~ | TASTER_LED | Taster_LED1 |
| 1 | SMD-1uF | C0603 | C2 |
| 5 | 10k | R0603 | R1, R2, R3, R12, R13 |
| 4 | SMD-3K3 | R0603 | R4, R7, R8, R10 |
| 4 | SMD-1K8 | R0603 | R5, R6, R9, R11 |
US-ring v02 design files
The KiCad project lives in the bohlebots/soccer repository on GitHub; these links point at the commit this page was built from.
- LayoutKiCad/US-ring_v02.kicad_pcb
- SchematicKiCad/US-ring_v02.kicad_sch
US-ring v02: common questions
What microcontroller does the US-ring v02 use?
The US-ring v02 is built around the ESP32-WROOM-32, from the ESP32 family.
How big is the US-ring v02 PCB?
The US-ring v02 measures 81.3 × 81.3 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the US-ring v02?
24 components, from 10 distinct parts. The full bill of materials is listed on this page.
Where can I download the US-ring v02 design files?
From the bohlebots/soccer repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the US-ring v02 design in my own project?
Yes, under the terms of its GPL-2.0 license, which bohlebots chose for the repository.
Can I test firmware for the US-ring v02 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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