2 layers66 × 71.8 mm
2 layers99.8 × 55.9 mm
The Accelaration and Velocity test module
- Size
- 99.8 × 55.9 mm
- Copper layers
- 2
- Thickness
- 1.69 mm
- Parts
- 52
- Nets
- 61
- Pads
- 160
- Tracks, vias
- 296, 295
- Pours
- 3
- Routed
- Yes
- KiCad
- KiCad 7 (file 20221018)
- Created
- 3 Aug 2023
- Updated
- 18 Dec 2025
Overview
UECU is an open-source printed circuit board by Parahybaja, from the Parahybaja/hardware repository on GitHub, published under the MIT licence. It is a 2-layer board of 99.8 × 55.9 mm with 52 parts on 61 nets, routed with 296 tracks and 295 vias.
It is built around the ESP32-DEVKITC-VE. Its parts include 15 capacitors, 9 resistors, 4 connectors, 3 ICs and 3 diodes. It belongs with the ESP32 boards of this library.
Main components
1README
README.mdHardware v2
UECU
Universal Electronics Control Unit
Module
The Accelaration and Velocity test module
Signal Cleaning
A signal cleaning stage was employed in the digital inputs of each sensor with the aim of eliminating electromagnetic interference in the data transmission line. For this purpose, a passive low-pass filter with a cutoff frequency of 1GHz was implemented.
To achieve the desired cutoff frequency, based on a resistor of 2.2k ohms, chosen to maintain the optimal current for the optocoupler's LED, the following calculations were made:
$$ F_c = \frac{1}{{2 \pi R C}} $$
$$ C = \frac{1}{{F_c \cdot 2 \pi R}} $$
$$ C = \frac{1}{{1 \text{GHz} \cdot 2 \pi \cdot 2.2k}} $$
$$ C \approx 72 \text{pF} $$
Parts
52| Qty | Value | Footprint | References |
|---|---|---|---|
| 6 | 100nF | Capacitor_THT:C_Disc_D5.0mm_W2.5mm_P5.00mm | C2, C7, C9, C11, C13, C15 |
| 5 | 10uF | Capacitor_THT:C_Disc_D5.0mm_W2.5mm_P5.00mm | C6, C8, C10, C12, C14 |
| 4 | 10k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R1, R5, R8, R9 |
| 4 | 3.7 | MountingHole:MountingHole_3.7mm | H1, H2, H3, H4 |
| 3 | 10pF | Capacitor_THT:C_Disc_D5.0mm_W2.5mm_P5.00mm | C3, C4, C5 |
| 3 | 4N25 | Package_DIP:DIP-6_W7.62mm | U1, U2, U3 |
| 2 | 2k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R2, R7 |
| 1 | 1N4007 | Diode_THT:D_A-405_P7.62mm_Horizontal | D2 |
| 1 | 2k2 | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R4 |
| 1 | 470R | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R3 |
| 1 | 470uF | Capacitor_THT:CP_Radial_D6.3mm_P2.50mm | C1 |
| 1 | 59k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R6 |
| 1 | Conn_SENSORS | Connector_JST:JST_XH_B3B-XH-A_1x03_P2.50mm_Vertical | J3 |
| 1 | Conn_display | Connector_JST:JST_XH_B4B-XH-A_1x04_P2.50mm_Vertical | J2 |
| 1 | Conn_pwr | Connector_JST:JST_XH_B2B-XH-A_1x02_P2.50mm_Vertical | J1 |
| 1 | ESP32-DevKitC | Espressif:ESP32-DevKitC | MCU1 |
| 1 | LED | LED_THT:LED_D5.0mm | D1 |
| 1 | LM2596_buck | StepDown:StepDown_LM2596 | P1 |
| 1 | LoRa-SX1276 | LoRa_SX1276:LoRa_SX1276 | T1 |
| 1 | TestPoint_Pad_D1.5mm | TestPoint:TestPoint_Pad_D1.5mm | REFe |
| 1 | ZENER 3V3 | Diode_THT:D_A-405_P7.62mm_Horizontal | D3 |
| 1 | ~ | Logos:parahybaja | L1 |
| 1 | ~ | Connector_PinHeader_2.54mm:PinHeader_1x08_P2.54mm_Vertical | S1 |
| 1 | ~ | Logos:open_hardware | L2 |
The 44 most common of 52 parts.
More from Parahybaja/hardware
1Similar boards
- 2 layers103.8 × 50 mm
Galagino pcb set
harbaum/galagino
A Galaga, Pac-Man and Donkey Kong arcade emulator for the ESP32
26 parts558 - 2 layers115 × 75 mm
SpinCoater
RParkerE/OpenSilicon
OpenSilicon enables DIY semiconductor fabrication with open-source guides for building IC equipment at home. The project includes BOMs, 3D files, firmware, and PDKs, supporting makers and researchers in chip fabrication.
11 parts55GPL-3.0 - 2 layers127.3 × 54.1 mm
ESP32 SolarBox
cole8888/SRNE-Solar-Charge-Controller-Monitor
Read data from SRNE solar charge controllers.
34 parts42 - 2 layers62.2 × 57.1 mm
- 2 layers99.9 × 99.9 mm
- 2 layers
- 2 layers72.5 × 84.8 mm
Devboard
ste2425/PSP-Bluetooth-AVConnector
An AV-Out Breakout library for the PSP. Providing Kicad symbols and footprints to interface with the PSP 2/3K AVOut socket (also known as the TVOut socket)
13 parts12 - 2 layers100 × 88.9 mm
Questions
How big is the UECU PCB?
It measures 99.8 × 55.9 mm and has 2 copper layers, 1.69 mm thick.
What parts does the UECU use?
52 parts, built around the ESP32-DEVKITC-VE. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the UECU KiCad files?
From the Parahybaja/hardware repository on GitHub, at the commit this page was made from: the board is UECU/UECU.kicad_pcb and its schematic UECU/UECU.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the UECU design in my own project?
Its repository publishes it under the MIT licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).