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tool_access_control_development [2018-11-03 17:42] – timtool_access_control_development [2019-02-24 13:35] – tim
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-====== Tool Access Control ====== +See [[tool_access_controllers]].
- +
-We're going to make some controllers to limit access to tools that are dangerous, expensive or easily damaged. +
- +
-Requirements: +
- +
-  * Use existing NFC tags +
-  * Use existing membership database (with enhancements for tracking permissions) +
-  * Allow some users to be "trainers", capable of granting usage permissions to new users +
-  * Allow some users to be "maintainers", capable of disabling/enabling a tool. +
-  * Mains powered +
-  * Able to switch a tool on or off by relay, secondary contactor or integration into an interlock circuit. +
- +
-Planned high-level design: +
- +
-  * Enclosure +
-  * 240V->5V power supply module +
-  * PN532 NFC module (I2C) +
-  * Buzzer/sounder +
-  * Current clamp +
-  * 20x4 line LCD (I2C) +
-  * Two push buttons +
-  * PCB: +
-    * ESP8266 microcontroller with WiFi +
-    * 5V->3.3V LDO +
-    * 5V relay with 240V/10A contacts +
- +
-PCB elements: +
- +
-  * ESP8266 ESP-12 +
-  * 3.3V LDO and capacitors +
-  * 5V relay with oversize tracks +
-  * N-channel MOSFET and diode for relay +
-  * Buzzer and N-channel MOSFET +
-  * I2C pullups +
-  * <del>Switchable voltage output (3.3V/5V) for PN532 and LCD</del> +
-  * Connectors: +
-    * FTDI (6-pin 0.1" male header) +
-    * Reset (2-pin 0.1" male header) +
-    * Boot Mode: (2-pin 0.1" male header) +
-    * PN532 GND, VCC, SDA, SCL, reset (5-pin 0.1" male header) +
-    * LCD GND, VCC, SDA, SCL (4-pin 0.1" male header) +
-    * 8-pin pluggable 3.5mm header +
-      * DC input GND, 5V (2 contact) +
-      * Current clamp (2 contact) +
-      * Button A (2 contact) +
-      * Button B (2 contact) +
-    * Relay (2 contact 10A pluggable screw terminal 5.0mm) +
- +
-GPIO mapping: +
- +
-^ Pin ^ Assignment ^ Restrictions ^ +
-| 0 | not used | pull-up | +
-| 2 | PN532 reset | pull-up | +
-| 4 | push button A | | +
-| 5 | push button B | | +
-| 12 | SCL | | +
-| 13 | SDA | | +
-| 14 | relay | | +
-| 15 | buzzer | pull-down | +
-| 16 | not used | connect to reset for wake (pull up) | +
-| ADC | current clamp | 0-1V | +
- +
-PCB ordered: http://gerblook.org/pcb/XTJvvHh7SqdGVgndaU67zS +
- +
-PCB BOM - Rev 2 (ss2) +
- +
-^ Ref ^ Item ^ Quantity ^ Selection ^ +
-| U1 | 3.3V LDO | 1 | Farnell 1652366 (NCP1117ST33T3G) | +
-| U2 | TE OJ/OJE series 5V relay | 1 | Farnell 1891661 | +
-| U3 | ESP-12/ESP-12E/ESP-12F | 1 | | +
-| SP1 | 12.7mm through-hole buzzer | 1 | CPC LS03778 or LS00654 | +
-| D1 | Flyback diode | 1 | Farnell 1625280 (US1D) | +
-| D2 | ESD protection diode | 1 | Farnell 2317508 (ESD5Z3.3T1G) | +
-| Q1, Q2 | N-channel MOSFET SOT-23 | 2 | Farnell 2069541 | +
-| C1, C2, C3 | 10uF capacitor | 3 | | +
-| C4 | 0.1uF 0603 capacitor | 1 | | +
-| R1, R2, R7, R10, R11, R12, R13, R14 | 10K 0603 | 8 | | +
-| R3, R4 | 22R 0603 | 2 | Optional, values depend on current clamp | +
-| R5 | 1K 0603 | 1 | | +
-| R6 | 56K 0603 | 1 | | +
-| R8, R9 | 2K2 0603 | 2 | | +
-| P1 | 8-way 3.5mm pluggable header | 1 | Wurth 3221 + Wurth 3611 | +
-| P2 | 4-way 0.1" header | 1 | | +
-| P3 | 2-way 5mm pluggable header | 1 | CPC CN18918 + CPC CN18994 | +
-| P4 | 5-way 0.1" header | 1 | | +
-| P5 | 6-way 0.1" header | 1 | | +
-| P6 | 2-way 0.1" header | 1 | | +
-| P7 | 2-way 0.1" header | 1 | | +
- +
-PCB BOM - Rev 3 (ss3) +
- +
-Errata: +
- +
-  * R2 in the schematic is R13 on the PCB +
- +
-^ Ref ^ Item ^ Quantity ^ Selection ^ +
-| U1 | Wemos D1 Mini | 1 |  | +
-| U2 | TE OJ/OJE series 5V relay | 1 | Farnell 1891661 | +
-| SP1 | 12.7mm through-hole buzzer | 1 | CPC LS03778 or LS00654 | +
-| D1 | Flyback diode | 1 | Farnell 1625280 (US1D) | +
-| D2 | ESD protection diode | 1 | Farnell 2317508 (ESD5Z3.3T1G) | +
-| Q1, Q2 | N-channel MOSFET SOT-23 | 2 | Farnell 2069541 | +
-| C3 | 10uF capacitor | 1 | | +
-| R1, R7, R13 | 10K 0603 | 3 | | +
-| R3, R4 | 22R 0603 | 2 | Optional, values depend on current clamp | +
-| R5 | 1K 0603 | 1 | | +
-| R6 | 56K 0603 | 1 | | +
-| R8, R9 | 2K2 0603 | 2 | | +
-| P1 | 8-way 3.5mm pluggable header | 1 | Wurth 3221 + Wurth 3611 | +
-| P2 | 4-way 0.1" header | 1 | | +
-| P3 | 2-way 5mm pluggable header | 1 | CPC CN18918 + CPC CN18994 | +
-| P4 | 5-way 0.1" header | 1 | | +
-| P7 | 2-way 0.1" header | 1 | | +
- +
-Enclosure BOM +
- +
-^ Item ^ Quantity ^ Selection ^ +
-| enclosure | 1 | [[https://www.ebay.co.uk/itm/Multi-Purpose-Waterproof-DIY-Project-Box-Enclosure-Case-IP65-ABS-Blue-Clear/361537022189|eBay]] | +
-| PCB | 1 | | +
-| laser-cut mounting plate | 1 | | +
-| push buttons | 2 | | +
-| LCD 20x4 | 1 | | +
-| LCD I2C backpack | 1 | | +
-| PN532 module | 1 | | +
-| 4-way 0.1" female/female 10cm cable | 1 | | +
-| 5-way 0.1" custom PN532 cable | 1 | | +
-| M3 10mm nylon screws | 6 | | +
-| M3 8mm nylon screws | 4 | | +
-| M3 nylon half nuts | 10 | | +
-| M3 nylon spacer 15mm | 2 | | +
- +
-System BOM +
- +
-^ Item ^ Quantity ^ Selection ^ +
-| enclosure | 1 | | +
-| 240V->5V PSU module | 1 | | +
-| LCD 20x4 5V | 1 | | +
-| I2C->LCD interface | 1 | | +
-| PN532 NFC | 1 | | +
-| contactor | 1 | | +
-| current clamp | 1 | | +
-| push buttons | 2 | CPC SW03314 <del>or SW03625</del> | +
-| 0.1" female/female patch wires | | | +
-| <del>0.1" female 2-way housings</del> |  | <del>CPC CN14555</del> | +
-| 0.1" female 4-way housings | 1 | CPC CN14558 | +
-| 0.1" female 5-way housings | 1 | CPC CN14558 | +
-| internal mountings | | laser cut | +
-| <del>LCD bezel</del> | | | +
- +
-Which tools? +
- +
-^ Tool ^ Status ^ Access ^ +
-| Table Saw | done | members | +
-| Clarke Band Saw | done | members | +
-| Sander | done | trained users only | +
-| Emco Lathe | done | members | +
-| Welder 32A socket | done | trained users only | +
-| Laser cutter #2 | done | limited access for testing | +
-| Mitre Saw | done | members | +
-| Bantam Lathe | done | trained users only | +
-| Startrite Band Saw | done | trained users only | +
-| Laser cutter #1 | | | +
-| Bench grinder #1 | | | +
-| Bench grinder #2 | | | +
-| Drill press(es) | | | +
-| Unimatic CNC router | | | +
-| Denford Novaturn lathe | | | +
-| Denford Novamill | | | +
- +
-Per-controller settings: +
- +
-  * adc to amps ratio +
-  * adc interval +
-  * session active timeout +
-  * session idle timeout +
- +
-Hardware Build Tasks: +
- +
-  * assemble PCB +
-  * drill push-button holes in case lid and fit push-buttons +
-  * drill cable entry holes in case and fit glands +
-  * solder leads to push-buttons +
-  * solder leads to PSU modules and add heatshrink +
-  * solder leads to NFC module (termination on 5-way header) +
-  * laser cut mounting plate +
-  * attach LCD, NFC and primary PCB to mounting plate +
-  * wiring for LCD, NFC +
-  * final wiring for mains +
- +
-Current Stock: +
- +
-  * 2x assembled v2 PCBs +
-  * 1x unopened enclosure +
-  * 4x push buttons +
-  * 1x 2-pin connector (both parts) +
-  * 3x AC-DC 5V 500mA PSUs (one with attached leads) +
-  * 5x PN532 +
-  * 1x blue LCD (and another 5x for non-tool projects) +
-  * 2x current clamps +
-  * 8x Wemos D1 Mini (plus 2 owed from shop stock) +
-  * 10x yellow LCD +
-  * 10x v3 PCBs +
- +
-Order: +
- +
-  * 2x yellow LCD +
-  * 2x Wemos D1 Mini +
-  * 10x current clamps +
-  * 7x PN532 +
-  * 11x enclosures+
  
tool_access_control_development.txt · Last modified: 2019-02-24 13:35 by tim
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