door_access_controllers
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door_access_controllers [2019-09-22 22:10] – [PCB v3] tim | door_access_controllers [2023-04-08 10:23] – [PCB ESP32 (draft)] tim | ||
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Errata: a generic through-hole flyback diode should be fitted between GND and 12V_OUT, on the underside of the screw terminal. | Errata: a generic through-hole flyback diode should be fitted between GND and 12V_OUT, on the underside of the screw terminal. | ||
- | ==== PCB v3 ==== | + | ===== PCB v4 ===== |
- | https:// | + | https:// |
- | * Off-the-shelf DC-DC converter | + | * Removed custom 12V-3.3V converter circuit |
- | * Split voltages | + | * Replaced with standard 12V-5V converter |
- | * Flyback diode on 12V switched | + | * I2C devices running |
- | * TVS diodes | + | * Removed LED series resistor (appropriate resistors must be used at installation time) |
- | * Normally-closed relay option removed | + | * Replace relay diode with M7 |
- | * Pull-up removed from piezo | + | * Added flyback diode to 12V relay output |
+ | * Removed ESD protection | ||
+ | * Removed 3.3V connection from FTDI connector | ||
+ | * Solder jumpers for no-volt relay output | ||
- | This is a minor revision and is not likely to be rolled-out except where a new door is required. | + | ^ Reference ^ Component ^ |
+ | | C1 | 0805 10uF 25V | | ||
+ | | C2 | 0805 10uF 10V | | ||
+ | | C3 | 0805 10uF 6.3V | | ||
+ | | C4 | 0603 0.1uF 6.3V | | ||
+ | | D1 | S1M+ | | ||
+ | | D2 | S1M+ | | ||
+ | | JP1 | PCB male header 2.54mm pitch 3-way | | ||
+ | | JP2 | PCB male header 2.54mm pitch 2-way | | ||
+ | | 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 (e.g. On Semi FDV303N) | | ||
+ | | R6 | 0603 10K | | ||
+ | | R7 | 0603 31K6 | | ||
+ | | R8 | 0603 2K2 | | ||
+ | | R9 | 0603 10K | | ||
+ | | R10 | 0603 10K | | ||
+ | | R11 | 0603 10K | | ||
+ | | R12 | 0603 4K7 | | ||
+ | | R13 | 0603 4K7 | | ||
+ | | R14 | 0603 10K | | ||
+ | | SW1 | EVQPT5 tactile switch | | ||
+ | | U1 | Recom R-78E5.0-1.0 | | ||
+ | | U2 | Songle SRD-12VDC-SL-C | | ||
+ | | U3 | ESP-12E or ESP-12F | | ||
+ | | U4 | SPX3819M5-L-3-3/ | ||
- | PCBs have been ordered 22nd September 2019. | + | ===== PCB ESP32 (draft) ===== |
- | ==== Future ==== | + | This is draft design for migrating to ESP32. |
- | Future versions may use the Wemos D1 Mini to aid maintainability. Alternatively, the next design may use the more powerful | + | Goals: |
+ | * ESP32 series | ||
+ | * compatibility with existing wiring | ||
+ | * fit into the existing plastic enclosures | ||
+ | * nice to haves: | ||
+ | * fit existing enclosures better | ||
+ | * make wiring easier | ||
+ | * allow for future flexibility | ||
+ | |||
+ | {{: | ||
+ | |||
+ | {{: | ||
+ | (placement and routing isn't finished) | ||
+ | |||
+ | What's changed: | ||
+ | * PCB is bigger, designed to screw into the enclosure as the manufacturer intended | ||
+ | * Uses the ESP32-S3-WROOM-1 module | ||
+ | * available with large flash/ram | ||
+ | * supports circuitpython | ||
+ | * supports native USB | ||
+ | * USB-C connector (plus optional UART pinout for low-level debugging) | ||
+ | * Pluggable 3.5mm terminal blocks for easier wiring (can be replaced with fixed blocks to reduce costs) | ||
+ | * MOSFET instead of relay (smaller, cheaper, probably more reliable) | ||
+ | * Dropped the PN532 reset pin in favour of a switchable power output (one less wire to manage) | ||
+ | * Reader connector has spare pins for existing LED and buzzer, but future readers can be I2C only for even less wiring | ||
+ | * Onboard RGB LED (will use with a light-pipe to eliminate the wiring for the current LED) | ||
+ | * Onboard buzzer | ||
+ | * Exit/ | ||
+ | * One I/O also has a power pin (e.g. to run the touch door handle) | ||
+ | * Optional Stemma QT (I2C) connector | ||
===== Controller Unit ===== | ===== Controller Unit ===== | ||
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* [[http:// | * [[http:// | ||
* [[http:// | * [[http:// | ||
- | * Laser-cut mounting plate: {{: | + | * Laser-cut mounting plate: {{: |
{{: | {{: | ||
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===== Reader Unit ===== | ===== Reader Unit ===== | ||
+ | |||
+ | ==== Version 1 ==== | ||
CAD files: {{: | CAD files: {{: | ||
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* 3mm blue LED | * 3mm blue LED | ||
- | * 120R resistor (this is low, but an additional resistor is used on the controller PCB) | + | * 120R resistor (or higher) |
* [[http:// | * [[http:// | ||
* [[http:// | * [[http:// | ||
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Cable colours in Hacklab installations: | Cable colours in Hacklab installations: | ||
- | ^ Pin ^ G1/G2/G8 ^ G11 (and photos) ^ | + | ^ Pin ^ G1/G2/G8 ^ G11 (and photos) |
- | | GND | blue | blue | | + | | GND | blue | blue | black | |
- | | VCC | green | orange | | + | | VCC | green | orange | red | |
- | | RST | brown | brown | | + | | SDA | orange | green | yellow |
- | | SDA | orange | green | | + | | SCL | white-green | white-green | blue | |
- | | SCL | white-green | white-green | | + | | RST | brown | brown | green | |
- | | LED +ve | white-brown | white-brown | | + | | LED +ve | white-brown | white-brown |
- | | Piezo | white-blue | white-blue | | + | | Piezo | white-blue | white-blue |
The LED should be connected between LED and GND, with a 120R series resistor. To avoid damaging the LED, use hot-melt glue to secure it in place (not cyanoacrylate). | The LED should be connected between LED and GND, with a 120R series resistor. To avoid damaging the LED, use hot-melt glue to secure it in place (not cyanoacrylate). | ||
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Test the reader and controller together before securing the reader to the wall with double-sided adhesive foam tape. | Test the reader and controller together before securing the reader to the wall with double-sided adhesive foam tape. | ||
+ | |||
+ | ==== Version 2 ==== | ||
+ | |||
+ | The goal of this version is to make the assembly process easier and more reliable. | ||
+ | |||
+ | It consists of a laser-cut acrylic plate that fits over a standard 1-gang UK electrical box. A PCB is glued to the inside of the plate, and this PCB integrates the PN532 module, buzzer, LED and wiring connections. | ||
+ | |||
+ | CAD files: {{: | ||
+ | PCB files: https:// | ||
===== Software ===== | ===== Software ===== | ||
+ | |||
+ | [[https:// | ||
+ | [[https:// | ||
Features: | Features: |
door_access_controllers.txt · Last modified: 2023-04-08 10:24 by tim