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.
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.
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.