2 layers52.2 × 52.2 mm
Base
google/mozc-devices
Circuit diagrams and firmware source code for Gboard DIY keyboards
43 parts3kApache-2.0
2 layers40.4 × 60 mm
The PCB stacks on top of the the Elechouse PN532 NFC reader board and adds indicator LEDs and a four-pin connector for a UART connection to a controller.
- Size
- 40.4 × 60 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 43
- Nets
- 38
- Pads
- 108
- Tracks, vias
- 167, 210
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 20 Feb 2021
- Updated
- 23 Jun 2025
Overview
Reader is an open-source printed circuit board by doorlockd, from the doorlockd/doorlockd-PCB-Reader repository on GitHub, published under the CERN-OHL-P-2.0 licence. It is a 2-layer board of 40.4 × 60 mm with 43 parts on 38 nets, routed with 167 tracks and 210 vias.
Its parts include 19 resistors, 7 connectors, 6 transistors, 4 diodes and 3 capacitors.
README
README.mdDoorlockd card reader
This repository contains the design for a small PCB for an NFC card reader to be used with the doorlockd door access system.
The PCB stacks on top of the the Elechouse PN532 NFC reader board and adds indicator LEDs and a four-pin connector for a UART connection to a controller.
This PCB is designed to be used with the doorlockd hardware and software, but can also be used with any other controller that can provide 5V and can talk over a UART.
In addition to the PCB, a 3D-printed case was made. Design files for that will hopefully be published later.
See the doorlockd organization page for some photographs of the card reader PCB in practice.
Features
This PCB provides:
- UART connection the the PN532 board, using a square (2x2) connector with standard 2.54mm pitch. The square connector makes it easy to feed the cable through a round hole in e.g. a door frame.
- Four indicator LEDs.
- One open-drain output pin, to control external LEDs, a solenoid, etc.
- One input pin, to read an external button, switch, etc.
The LEDs, output and input pin are driven/read by I/O pins on the PN532 NFC chip and can be individually controlled/read by sending the proper commands via UART.
License
Copyright 2021-2025 Matthijs Kooijman (matthijs@stdin.nl)
This source describes Open Hardware and is licensed under the CERN-OHL-P v2 or any later version.
You may redistribute and modify this documentation and make products using it under the terms of the CERN-OHL-P v2 (https:/cern.ch/cern-ohl).
This documentation is distributed WITHOUT ANY EXPRESS OR IMPLIED WARRANTY, INCLUDING OF MERCHANTABILITY, SATISFACTORY QUALITY AND FITNESS FOR A PARTICULAR PURPOSE. Please see the CERN-OHL-P v2 for applicable conditions
See LICENSE.txt for the full license text.
Parts
43| Qty | Value | Footprint | References |
|---|---|---|---|
| 13 | 1k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R3, R4, R5, R6, R9, R10, R11, R12, R13, R14, R16, R17, R18 |
| 6 | 2N7002 | Package_TO_SOT_SMD:SOT-23_Handsoldering | Q1, Q2, Q3, Q4, Q5, Q6 |
| 4 | LED | LED_THT:LED_Rectangular_W5.0mm_H2.0mm | D1, D2, D3, D4 |
| 4 | ~ | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R1, R2, R7, R8 |
| 3 | MountingHole | MountingHole:MountingHole_3.2mm_M3 | H1, H2, H3 |
| 1 | 100R | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R19 |
| 1 | 100k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R15 |
| 1 | 100n | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C2 |
| 1 | 10uF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C3 |
| 1 | 1uF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C1 |
| 1 | Amphenol Dubox 76383-402LF | Connector_PinHeader_2.54mm:PinHeader_2x02_P2.54mm_Horizontal | J2 |
| 1 | Conn_01x02 | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Horizontal | J7 |
| 1 | Conn_01x03 | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Horizontal | J6 |
| 1 | Conn_01x04 | Connector_PinSocket_2.54mm:PinSocket_1x04_P2.54mm_Vertical | J3 |
| 1 | Conn_01x04 | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical | J1 |
| 1 | Conn_01x08 | Connector_PinSocket_2.54mm:PinSocket_1x08_P2.54mm_Vertical | J4 |
| 1 | Conn_01x10 | Connector_PinSocket_1.27mm:PinSocket_1x10_P1.27mm_Vertical | J5 |
| 1 | Logo_Open_Hardware_Large | Symbol:OSHW-Symbol_8.9x8mm_SilkScreen | LOGO1 |
Questions
How big is the Reader PCB?
It measures 40.4 × 60 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Reader use?
43 parts. 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 Reader KiCad files?
From the doorlockd/doorlockd-PCB-Reader repository on GitHub, at the commit this page was made from: the board is PCB/Reader.kicad_pcb and its schematic PCB/Reader.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Reader design in my own project?
Its repository publishes it under the CERN-OHL-P-2.0 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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