2 layers76.5 × 109.1 mm
RD40 display V1
lhm0/rotating_display
A DIY 40 LED rotating display with Arduino nano and ESP-01s microcontrollers
32 parts71
2 layers90 × 143.5 mm
Cerradura
AndyPecotche/tallerProyectoI- Size
- 90 × 143.5 mm
- Copper layers
- 2
- Thickness
- 1.59 mm
- Parts
- 22
- Nets
- 42
- Pads
- 126
- Tracks, vias
- 310, 22
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 17 Nov 2025
- Updated
- 1 Jul 2026
Overview
Cerradura is an open-source printed circuit board by AndyPecotche, from the AndyPecotche/tallerProyectoI repository on GitHub, published under the BSD-3-Clause licence. It is a 2-layer board of 90 × 143.5 mm with 22 parts on 42 nets, routed with 310 tracks and 22 vias.
It is built around the DRV8825PWP, BC547 and A3144.
Main components
3
DRV8825PWP
HTSSOP-28-EP-40℃~+85℃ 2 2.5A 200mΩ 32 8.2V~45V Bipolar Driver STEP/DIR Yes HTSSOP-28-EP Stepper Motor Driver ROHSTexas InstrumentsStepper Motor Driver
BC547
TO-92Bipolar (BJT)Jiangsu Changjing Electronics Technology (CJ)
A3144
SOT-23-40℃~+125℃ 3.8V~40V 4mT 6mA 6mT Open Collector Reverse voltage protection、Built-in Schmitt trigger Unipolar SOT-23 Hall Switches ROHSJSMSEMIHall Switches
README
README.mdPasos
- Teniendo un workspace funcioal en eclipse, apuntando a un firmware_v3 ya funcionando, dirigirse a la carpeta donde se encuentra el mismo en el sistema.
- Una vez en el directorio donde se encuentra el proyecto con un nombre como "firmware_v3-r1.3.0" o "firmware_v3" o "firmware_v3-master", eliminar o mover o renombrar esa carpeta a otro lado.
- Clonar este repositorio
- Renombrar el directorio del repositorio clonado con el mismo nombre del directorio del paso anterior (es importante que sea exactamente el mismo).
- Al abrir eclipse en el workspace que se venia trabajando se deberia reconocer el nuevo proyecto con algunos cambios, pero aun funcionando los comandos de build y deploy.
Parts
22| Qty | Value | Footprint | References |
|---|---|---|---|
| 2 | BC547 | Package_TO_SOT_THT:TO-92_Inline | T1, T2 |
| 1 | 12V-DC-IN | TerminalBlock:TerminalBlock_Altech_AK300-2_P5.00mm | 12V-BORN1 |
| 1 | A3144 | TerminalBlock:TerminalBlock_Altech_AK300-3_P5.00mm | A3144 |
| 1 | DRV8825 | Module:Pololu_Breakout-16_15.2x20.3mm | DRV8825 |
| 1 | EDU_L | Connector_IDC:IDC-Header_2x20_P2.54mm_Vertical | EDU_L1 |
| 1 | EDU_R | Connector_IDC:IDC-Header_2x20_P2.54mm_Vertical | EDU_R1 |
| 1 | ESP | Connector_PinSocket_2.54mm:PinSocket_2x08_P2.54mm_Vertical | ESP1 |
| 1 | HW-416-PIR | Connector_PinSocket_2.54mm:PinSocket_1x03_P2.54mm_Vertical | HW-416-PIR1 |
| 1 | Jump1 | Connector_PinSocket_2.54mm:PinSocket_1x02_P2.54mm_Vertical | Jump1 |
| 1 | Jump2 | Connector_PinSocket_2.54mm:PinSocket_1x02_P2.54mm_Vertical | Jump2 |
| 1 | R1 (10k) | Connector_PinHeader_1.00mm:PinHeader_1x02_P1.00mm_Vertical | R1-10K1 |
| 1 | R2 | Connector_PinHeader_1.00mm:PinHeader_1x02_P1.00mm_Vertical | R2 |
| 1 | R3 | Connector_PinHeader_1.00mm:PinHeader_1x02_P1.00mm_Vertical | R3 |
| 1 | R305_sensor | Connector_PinSocket_2.54mm:PinSocket_1x04_P2.54mm_Vertical | R305 |
| 1 | RC522 | Connector_PinSocket_2.54mm:PinSocket_1x08_P2.54mm_Vertical | RC522 |
| 1 | bornes_5v | TerminalBlock:TerminalBlock_Altech_AK300-2_P5.00mm | 5V_BORN1 |
| 1 | bornes_buzzer | TerminalBlock:TerminalBlock_Altech_AK300-2_P5.00mm | BUZZER1 |
| 1 | bornes_motor | TerminalBlock:TerminalBlock_Altech_AK300-4_P5.00mm | bornes_motor1 |
| 1 | lm2596hvs DC-DC | Connector_PinSocket_1.00mm:PinSocket_2x02_P1.00mm_Vertical_SMD | lm2596hvs1 |
| 1 | num_keypad | Connector_PinSocket_2.54mm:PinSocket_1x08_P2.54mm_Vertical | num_keypad1 |
| 1 | ssd1306_dsp | Connector_PinSocket_2.54mm:PinSocket_1x04_P2.54mm_Vertical | SSD1306 |
Questions
How big is the Cerradura PCB?
It measures 90 × 143.5 mm and has 2 copper layers, 1.59 mm thick.
What parts does the Cerradura use?
22 parts, built around the DRV8825PWP, BC547 and A3144. 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 Cerradura KiCad files?
From the AndyPecotche/tallerProyectoI repository on GitHub, at the commit this page was made from: the board is kicad-pcb/cerradura.kicad_pcb and its schematic kicad-pcb/cerradura.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Cerradura design in my own project?
Its repository publishes it under the BSD-3-Clause licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).
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