Before maze
About the Before maze PCB
Before maze is an open source ESP32 PCB design by ekremturanfirat, published on GitHub under the CERN-OHL-S-2.0 license. It is a 4-layer board measuring 100 × 90 mm, with 109 components from 53 distinct parts.
Its main chip is the ESP32-WROOM-32E-N4, from the ESP32 family. Other key parts include the LM74700QDBVRQ1, PTPS16890VMAR, LMR38020FSDDAR, DRV8323RSRGZT and TMP235A4DCKR. By type, the board carries 44 capacitors, 33 resistors, 8 ICs, 8 connectors, 7 transistors and 5 diodes.
It belongs with the robotics & motion designs in this gallery.
From the project
KiCad PCB design project
KiCad project for a 3-phase brushless motor ESC.
- MCU: ESP32-WROOM-32E, soldered SMD directly onto the PCB (no plug-in module) - Input: 12–36V DC - Target continuous phase current: ~5–10A - Control/telemetry: UART + CAN bus - Design follows METU PowerLab PCB design rules and uses parts exclusively from PowerLabKiCadLibraries.
Main components on the Before maze
Before maze bill of materials (BOM)
109 components, 53 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | ESP32-WROOM-32E-N4 ESP32-WROOM-32E Espressif Systems | ESP32-WROOM-32E | U1 |
| 1 | LM74700QDBVRQ1 Texas Instruments | SOT-23-6_DBV | U2 |
| 1 | PTPS16890VMAR Texas Instruments | 23-LQFN-CLIP_(VMA) | U3 |
| 1 | LMR38020FSDDAR Texas Instruments | 8-SOICPower | U4 |
| 1 | DRV8323RSRGZT Texas Instruments | 48-VQFN | U6 |
| 1 | TMP235A4DCKR Texas Instruments | SC-70-5 | U8 |
| 1 | INA240A1DR Texas Instruments | 8-SOIC | U9 |
| 1 | SN65HVD230DR Texas Instruments | 8-SOIC | U10 |
| 7 | NTMFS006N08MC onsemi | 8-PowerTDFN(5x6mm) | Q1, Q2, Q3, Q4, Q5, Q6, Q7 |
| 1 | 2147210040 UART Molex | 2147210040 | J1 |
| 1 | 384471-E EXPANSION TE Connectivity Erni | 384471-E | J2 |
| 1 | 7770 VIN+ Keystone Electronics | 7770 | J3 |
| 1 | 7770 GND Keystone Electronics | 7770 | J4 |
| 3 | 7770 PHASE Keystone Electronics | 7770 | J5, J6, J7 |
| 1 | 384471-E CAN TE Connectivity Erni | 384471-E | J8 |
| 1 | TL6330AF200Q RESET E-Switch | TL6330AF200Q | SW1 |
| 1 | TL6330AF200Q BOOT E-Switch | TL6330AF200Q | SW2 |
| 2 | 150060GS75000 Green Würth Elektronik | 0603_Medium | D1, D20 |
| 1 | SMBJ36CA-13-F Diodes Incorporated | DO-214AA | D10 |
| 2 | CDSOD323-T24SC Diodes Incorporated | SOD-323 | D60, D61 |
Show 33 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | BLM18EG221SN1D Murata Electronics | 0603_Medium | FB1 |
| 1 | EXLA1V0505-4R7-R 4.7µH Eaton - Electronics Division | 6x5_7mm | L1 |
| 1 | CL10A226MP8NUNE 22 µF Samsung Electro-Mechanics | 0603_Medium | C1 |
| 9 | CC0603KRX7R7BB104 100 nF YAGEO | 0603_Medium | C2, C18, C22, C25, C27, C30, C45, C58 +1 |
| 2 | GRM188D72A105KE01D 1 µF Murata Electronics | 0603_Medium | C3, C44 |
| 6 | CL10B221JB8NNNC 220 pF Samsung Electro-Mechanics | 0603_Medium | C4, C5, C6, C7, C8, C15 |
| 7 | CL10B104KC8NNNC 100 nF 100V Samsung Electro-Mechanics | 0603_Medium | C10, C13, C21, C40, C51, C53, C55 |
| 1 | CC0603KRX7R7BB104 100 nF 16V YAGEO | 0603_Medium | C11 |
| 2 | CL32Y475MCIVPNE 4.7 µF 100V Samsung Electro-Mechanics | 1210_Medium | C12, C20 |
| 1 | CL10B104KC8NNNC 100 nF Samsung Electro-Mechanics | 0603_Medium | C14 |
| 1 | CL10C220JB8NFNC 22 pF Samsung Electro-Mechanics | 0603_Medium | C16 |
| 1 | GCM1885C2A102JA16D 1 nF Murata Electronics | 0603_Medium | C17 |
| 5 | C3216X6S2A106K160AC 10 µF 100V TDK Corporation | 1206_Medium | C19, C41, C50, C52, C54 |
| 2 | TMK325ABJ476MM-T 47 µF Taiyo Yuden | 1210_Medium | C23, C24 |
| 1 | CL10A106MP8NNNC 10 µF Samsung Electro-Mechanics | 0603_Medium | C26 |
| 1 | GRM188D72A105KE01D 1 µF 100V Murata Electronics | 0603_Medium | C42 |
| 1 | 885012206118 47 nF 100V Würth Elektronik | 0603_Medium | C43 |
| 2 | 107AVG063MFBJ 100 µF 63V Cornell Dubilier Knowles | 8.00x13.50mm | C56, C57 |
| 1 | GCM188R72A472KA37D 4.7 nF Murata Electronics | 0603_Medium | C61 |
| 16 | RC0603FR-0710KL 10 kOhm YAGEO | 0603_Medium | R1, R2, R13, R14, R15, R16, R40, R41 +8 |
| 2 | RMCF0603FT1K00 1 kOhm Stackpole Electronics Inc | 0603_Medium | R3, R24 |
| 1 | RMCF0603FT120R 120 Ohm Stackpole Electronics Inc | 0603_Medium | R10 |
| 1 | RMCF0603FT866K 866 kOhm Stackpole Electronics Inc | 0603_Medium | R11 |
| 1 | RMCF0603FT118K 118 kOhm Stackpole Electronics Inc | 0603_Medium | R12 |
| 1 | RMCF0603FT3K65 3.65 kOhm Stackpole Electronics Inc | 0603_Medium | R17 |
| 1 | RMCF0603FT1K33 1.33 kOhm Stackpole Electronics Inc | 0603_Medium | R18 |
| 1 | RMCF0603FT54K9 54.9 kOhm Stackpole Electronics Inc | 0603_Medium | R20 |
| 1 | RMCF0603FT110K 110 kOhm Stackpole Electronics Inc | 0603_Medium | R21 |
| 1 | RMCF0603FT47K0 47 kOhm Stackpole Electronics Inc | 0603_Medium | R22 |
| 1 | RMCF0603FT100K 100 kOhm Stackpole Electronics Inc | 0603_Medium | R23 |
| 1 | VMP-R005-1.0-U 5 mOhm Isabellenhuette USA | 2010 | R30 |
| 3 | SSA2512LR002JWR 2 mOhm Littelfuse Inc. | 2512 | R50, R51, R52 |
| 2 | RMCF0603FT56R0 56 Ohm Stackpole Electronics Inc | 0603_Medium | R60, R61 |
Before maze design files
The KiCad project lives in the ekremturanfirat/ClaudeTestPCB repository on GitHub; these links point at the commit this page was built from.
Before maze: common questions
What microcontroller does the Before maze use?
The Before maze is built around the ESP32-WROOM-32E-N4, from the ESP32 family.
How big is the Before maze PCB?
The Before maze measures 100 × 90 mm, has 4 copper layers and is 1.6 mm thick.
How many components are on the Before maze?
109 components, from 53 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.
Where can I download the Before maze design files?
From the ekremturanfirat/ClaudeTestPCB repository on GitHub, which has the KiCad layout and the BOM; the links under Design files point to each one.
Can I use the Before maze design in my own project?
Yes, under the terms of its CERN-OHL-S-2.0 license, which ekremturanfirat chose for the repository.
Can I test firmware for the Before maze 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.
More boards in ClaudeTestPCB
ESP32ESC3Phase
100 × 90 mm109 parts4LCERN-OHL-S-2.02
ESP32R7
100 × 90 mm109 parts4LCERN-OHL-S-2.02
ESP32Pre routed
100 × 90 mm109 parts4LCERN-OHL-S-2.02
ESP32R7 nognd
100 × 90 mm109 parts4LCERN-OHL-S-2.02
ESP32Nognd
100 × 90 mm109 parts4LCERN-OHL-S-2.02
Similar boards
ESP32Open Book Abridged Edition
joeycastillo
85 × 115 mm65 parts2LCC-BY-SA-4.08.1k
ESP32Badge
atopile
56.3 × 39 mm239 parts4LMIT4.0k
ESP32Esp32 minimal
36.2 × 26.8 mm20 parts2LMIT4.0k
ESP32Racer
StuckAtPrototype
36 × 50.2 mm70 parts4LApache-2.03.8k
ESP32Controller
29 × 74 mm58 parts4LApache-2.03.8k
ESP32Bitaxe
skot
56.5 × 99.8 mm86 parts4LCERN-OHL-S-2.01.4k