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Door Controller V2

Component Overview

  • Controller: Enclosure, PCB inc ESP8266, LED, push-button
  • Reader: PN532 module, laser-cut case, LED, piezo disc
  • Door Hardware: electric release, magnetic door-closed sensor, optional exit button/sensor
  • Software: ESP8266 firmware, Python server application


Reference Component Farnell
C1 1206 10uF 25V 2320887
C2 1206 22uF 6.3V 2320911
C3, C4 0603 0.1uF 6.3V 1759016
D1 SMA diode B230A 1843686
D2 SMA diode (flyback protection) 1625280
JP1 PCB male header 2.54mm pitch 3-way
JP2 PCB male header 2.54mm pitch 2-way
L1 Coilcraft LPS6225-472MRB 4.7uH 2A 2408256
P1, P2, P3 PCB screw terminals 5.08mm pitch 2-way (9 total)
P4 PCB male header 2.54mm pitch 6-way
Q1, Q2 MOSFET-N SOT-23 2069541
R1 0603 31K6 1% 2059454
R3 0603 56K 1% 2303215
R2, R4 0603 10K2 1% 2059407
R5, R6, R7, R9, R10, R11 0603 10K 1% 2303192
R8 0603 2K2 1% 2303166
SW1 EVQPT5 tactile switch 2425617
U1 ADP2301
U2 SRD 12V relay
U3 ESP-12E
between GND/12V_OUT generic through-hole flyback diode

[todo: assembly notes, add diode to switched 12V output, configure relay mode with jumper]


CAD files: DWG DXF

Circuit diagram: PDF


  • 3mm blue LED
  • 120R resistor (this is low, but an additional resistor is used on the controller PCB)
  • Cat 5 or other cable with at least 7 cores

The reader enclosure is formed from three layers of 3mm black acrylic. The layers should be joined with cyanoacrylate adhesive.

Configure the PN532 module to use I2C communications.

Bend and cut the LED leads to the correct shape and length. Solder the LED and cable before gluing the module into the enclosure.

Cat 5 cable colours:

blue GND
green VCC
brown RST
orange SDA
white-green SCL
white-brown LED +ve
white-blue Piezo
white-orange not used

Note that on the G11 door and in the photos, orange=VCC and green=SDA.

The LED should be connected between white-brown and GND (blue), with a 120R series resistor. To avoid damaging the LED, use hot-melt glue to secure it in place (not cyanoacrylate).

The piezo should be connected between white-blue and VCC (green). The piezo may be secured with cyanoacrylate or hot-melt glue, but try to give the disc some freedom of movement or the sound output may be reduced.

Test the reader and controller together before securing the reader to the wall with double-sided adhesive foam tape.



The laser-cut mounting plate is designed to hold the PCB secure at the back of the enclosure. Attach the PCB with M3 nylon bolts and nylon or metal nuts (the nut should go above the board to minimise the space used below the mounting plate).

The mounting plate should secure itself reasonably well with a push-fit, but consider adding a rubber foot or a blob of hot-melt glue to prevent it from rocking.

Drill a large hole in the side of the enclosure for wiring. Drill screw holes for wall-mounting. Drill two holes in the enclosure lid for the LED and push-button.

The push-button and LED may be wired as two separate pairs, or with a shared GND. The LED should have a 120R series resistor.

Connect the reader cable to the 8-way screw terminals. The controller push-button should be connected to the GND/SNIB pair of terminals. The controller LED should be connected to GND and LED (shared with the reader).

Take care to keep wiring away from the antenna.



Management Server


doorcontroller2.txt · Last modified: 2017-02-04 11:17 by tim