Juca
About the Juca PCB
Juca is an open source ESP32 PCB design by MatheusPinto, published on GitHub under the MIT license. It is a 2-layer board measuring 180.1 × 125.7 mm, with 74 components from 34 distinct parts.
Its main chip is the ESP32-S3-WROOM-1, from the ESP32 family. Other key parts include the L298HN, LM324A, mini-DC-DC, AMS1117-3.3 and MPU-6050. By type, the board carries 22 resistors, 17 diodes, 12 capacitors, 11 connectors, 6 ICs and 3 transistors.
It belongs with the iot & wireless, robotics & motion and power & battery designs in this gallery.
From the project
Juca, an embedded mobile robotics board for education
O Juca é a placa eletrônica propriamente dita, conforme observado na Figura 1 e Figura 2. Ela possui 180 mm x 125 mm, composta de duas camadas, com objetivo de ser robusta.
Na Figura 3 é apresentado o diagrama de blocos do Juca. Serão apresentados cada módulo presente no sistema.
O sistema utiliza o SoC ESP32-S3-WROOM-1, aproveitando suas capacidades de processamento dual-core e capacidade de comunicação por Wi-fi e BLE. O esquemático relacionado a esse módulo encontra-se na Figura 4. O ESP32-S3 têm picos de consumo de corrente muito rápidos (especialmente ao ligar o Wi-Fi). Os capacitores…
Main components on the Juca
Juca bill of materials (BOM)
74 components, 34 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | L298HN | TO-220-15_P2.54x2.54mm_StaggerOdd_Lead4.58mm_Vertical | U1 |
| 1 | LM324A | SOIC-14_3.9x8.7mm_P1.27mm | U2 |
| 1 | mini-DC-DC | mini-DC-DC | U3 |
| 1 | AMS1117-3.3 | SOT-223-3_TabPin2 | U4 |
| 1 | ESP32-S3-WROOM-1 | ESP32-S3-WROOM-1 | U5 |
| 1 | MPU-6050 | mpu6050_module | U6 |
| 3 | 2N7002H | SOT-23 | Q1, Q2, Q3 |
| 2 | Conn_01x06 | Molex_KK-254_AE-6410-06A_1x06_P2.54mm_Vertical | J1, J2 |
| 1 | Conn_01x02 | Molex_KK-254_AE-6410-02A_1x02_P2.54mm_Vertical | J3 |
| 1 | Jack-DC | Jack_J4_ 2_1mm_vertical | J4 |
| 1 | Conn_01x13 | PinHeader_1x13_P2.54mm_Vertical | J5 |
| 1 | Conn_01x07 | Molex_KK-254_AE-6410-07A_1x07_P2.54mm_Vertical | J6 |
| 3 | Conn_01x04 | Molex_KK-254_AE-6410-04A_1x04_P2.54mm_Vertical | J7, J8, J9 |
| 1 | USB_B | USB_B_TE_5787834_Vertical | J10 |
| 1 | Conn_01x04 | PinHeader_1x04_P2.54mm_Vertical | J11 |
| 1 | RESET_SW | SW_SPST_PTS645 | SW1 |
| 1 | BOOT_SW | SW_SPST_PTS645 | SW2 |
| 1 | POWER | ToggleSwitch_MTS-102_SPDT | SW3 |
| 8 | 1N4007 | D_SMA | D1, D2, D3, D4, D5, D6, D7, D8 |
| 2 | LED | LED_0603_1608Metric_Pad1.05x0.95mm_HandSolder | D9, D11 |
Show 14 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 2 | 20CJQ045 | SOT-223-3_TabPin2 | D10, D14 |
| 3 | ESD | D_SOD-523 | D12, D13, D15 |
| 2 | D_Zener | D_MiniMELF | D16, D17 |
| 2 | 100n | CP_Elec_8x10 | C1, C2 |
| 5 | 1u | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C3, C4, C9, C10, C12 |
| 2 | 100n | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C5, C11 |
| 2 | 10u | CP_EIA-6032-28_Kemet-C_Pad2.25x2.35mm_HandSolder | C6, C7 |
| 1 | 10u | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C8 |
| 2 | 0.1 | R_Axial_DIN0516_L15.5mm_D5.0mm_P7.62mm_Vertical | R1, R2 |
| 4 | 3k | R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R3, R4, R5, R6 |
| 4 | 200k | R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R7, R8, R9, R10 |
| 2 | 150 | R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R11, R12 |
| 8 | 10k | R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R13, R14, R17, R18, R19, R20, R21, R22 |
| 2 | 1K | R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R15, R16 |
Juca design files
The KiCad project lives in the MatheusPinto/Juca repository on GitHub; these links point at the commit this page was built from.
Juca: common questions
What microcontroller does the Juca use?
The Juca is built around the ESP32-S3-WROOM-1, from the ESP32 family.
How big is the Juca PCB?
The Juca measures 180.1 × 125.7 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Juca?
74 components, from 34 distinct parts. The full bill of materials is listed on this page.
Where can I download the Juca design files?
From the MatheusPinto/Juca repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the Juca design in my own project?
Yes, under the terms of its MIT license, which MatheusPinto chose for the repository.
Can I test firmware for the Juca 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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