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Open authenticator
Open-Authenticator/hardware-design42Hardware design files for open authenticator
- Size
- 82 × 42 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 86
- Nets
- 64
- Pads
- 248
- Tracks, vias
- 556, 145
- Pours
- 22
- Routed
- Yes
- KiCad
- KiCad 5 (file 20171130)
- Created
- 1 Dec 2020
- Updated
- 23 Aug 2021
Overview
Open authenticator is an open-source printed circuit board by Open-Authenticator, from the Open-Authenticator/hardware-design repository on GitHub, published under the MIT licence. It is a 2-layer board of 82 × 42 mm with 86 parts on 64 nets, routed with 556 tracks and 145 vias.
It is built around the ESP32-WROOM-32, TPS63001DRC and DS3231MZ+, with the S2B-PH-SM4-TB(LF)(SN), SS14 and TYPE-C-31-M-17 among its other parts. Its parts include 18 capacitors, 18 resistors, 5 ICs, 5 switches and 4 connectors. It belongs with the ESP32 boards of this library.
Main components
6
ESP32-WROOM-32
SMD,18x25.5mm-40℃~+85℃ -98dBm 2.4GHz 2.7V~3.6V 20dBm Bluetooth4.2 ESP32-DOWDQ6 UART、SDIO、SPI、I2C、GPIO、PWM、ADC、DAC SMD,25.5x18mm WiFi Modules ROHSEspressif SystemsWiFi Modules
TPS63001DRC
VSON-10-EP(3x3)-40℃~+85℃@(TA) 1 1.5MHz 1.8V~5.5V 3.3V 50uA Buck-Boost Buck-Boost Built-in Fixed Yes VSON-10-EP(3x3) DC-DC Converters ROHSTexas InstrumentsDC-DC Converters
DS3231MZ+
SOIC-8-40℃~+85℃ 2.3V~5.5V I2C Temperature compensation、Backup power management and battery charging、Alarm function、Periodic interrupt output SOIC-8 Real Time Clocks ROHSMaxim Integrated (Analog Devices)Real Time Clocks
S2B-PH-SM4-TB(LF)(SN)
SMD,P=2mm,卧贴-25℃~+85℃ 1 100V 1x2P 2 2A 2P 2mm 5.5mm 7.9mm 8.6mm Auxiliary Solder Pin Beige Copper alloy PA PH Surface Mount, Right Angle Tin UL94V-0 SMD,P=2mm,卧贴 Wire To Board Connector ROHSJSTWire To Board Connector
SS14
SMA(DO-214AC)-55℃~+150℃ 1A 25A 300uA@40V 40V 550mV@1A Independent SMA(DO-214AC) Schottky Diodes ROHSMDDSchottky Diodes
TYPE-C-31-M-17
SMD-30℃~+80℃ 1 20V 3,000 Cycles 5A 6.8mm 6P Female Surface Mount, Right Angle Type-C SMD USB Connectors ROHSHRO ElectronicsUSB Connectors
README
README.mdOpen Authenticator Hardware Design
This repository contains hardware design files and datasheets for the open authenticator. This project is in development and is not ready for release.
Features
- Small form factor of 82mm x 42mm
- Uses ESP32-WROOM-32D module
- Uses 128x64 0.96" inch OLED panel
- Uses DS3231 RTC with battery backup (CR2032) for timekeeping
- Powered by 3.7V 300 mAh LiPo battery
- Uses MCP73831 for charging LiPo battery
- Uses TPS63001 Buck Boost Converter IC for efficient 3.3V power supply, with input range from 1.8V - 5.5V
- Uses TPS22919 Load switch to control power to OLED and RTC chip
- Autoselect power source, i.e., battery or USB
- USB Type-C for charging only (no data pins connected)
Project Structure
/datasheets - contains datasheets of various components used in the pcb
/kicad_project - contains kicad project files for the pcb
/schematics - contains schematics of the the pcbTools
To view/modify the files from this repository, install KiCAD from: https://kicad.org
Schematics
Plots
Front side
Back side
Credits
Thanks to OSHPark for sponsoring first prototypes
Thanks to PCBway for sponsoring the final prototypes
Parts
86| Qty | Value | Footprint | References |
|---|---|---|---|
| 16 | buzzard_labels | , , , , , , , , , , , , , , , | |
| 6 | 10uF 50V | Capacitor_SMD:C_1206_3216Metric | C1, C4, C6, C8, C9, C11 |
| 5 | 10k | Resistor_SMD:R_0603_1608Metric | R4, R5, R6, R13, R14 |
| 5 | 4.7k | Resistor_SMD:R_0603_1608Metric | R2, R3, R7, R15, R16 |
| 3 | 1uF 50V | Capacitor_SMD:C_1206_3216Metric | C3, C5, C10 |
| 3 | MountingHole_Pad | MountingHole:MountingHole_2.2mm_M2_ISO7380_Pad | H1, H2, H3 |
| 2 | 0.1uF 16V | Capacitor_SMD:C_0603_1608Metric | C13, C14 |
| 2 | 0.1uF 50V | Capacitor_SMD:C_1206_3216Metric | C2, C7 |
| 2 | 100k | Resistor_SMD:R_0603_1608Metric | R9, R10 |
| 2 | 1uF 16V | Capacitor_SMD:C_0603_1608Metric | C17, C18 |
| 2 | 5.1k | Resistor_SMD:R_0603_1608Metric | R11, R12 |
| 1 | 100 | Resistor_SMD:R_0603_1608Metric | R1 |
| 1 | 10uF 16V | Capacitor_SMD:C_0603_1608Metric | C12 |
| 1 | 1N5819 | Diode_SMD:D_SOD-123 | D3 |
| 1 | 1k | Resistor_SMD:R_0603_1608Metric | R8 |
| 1 | 2.2 uH | CDRH104RNP-150NC:INDPM102100X400N | L1 |
| 1 | 2.2uF 16V | Capacitor_SMD:C_0603_1608Metric | C16 |
| 1 | 310k | Resistor_SMD:R_0603_1608Metric | R17 |
| 1 | 3V3 | Connector_Wire:SolderWirePad_1x01_SMD_1x2mm | TP1 |
| 1 | 3v | CR2032-BS-6-1:CR2032BS61 | BT1 |
| 1 | 4.7uF 16V | Capacitor_SMD:C_0603_1608Metric | C15 |
| 1 | 910k | Resistor_SMD:R_0603_1608Metric | R19 |
| 1 | BOOT/SELECT | Button_Switch_SMD:SW_Push_1P1T_NO_6x6mm_H9.5mm | SW3 |
| 1 | Conn_01x02_Female | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | J1 |
| 1 | DMP2305U-7 | DMP2305U-7:SOT96P240X110-3N | Q1 |
| 1 | DOWN | Button_Switch_SMD:SW_Push_1P1T_NO_6x6mm_H9.5mm | SW2 |
| 1 | DS3231M | Package_SO:SOIC-16W_7.5x10.3mm_P1.27mm | U2 |
| 1 | ESP32-WROOM-32 | RF_Module:ESP32-WROOM-32 | U1 |
| 1 | GND | Connector_Wire:SolderWirePad_1x01_SMD_1x2mm | TP8 |
| 1 | LED | LED_SMD:LED_0603_1608Metric_Castellated | D2 |
| 1 | LOAD_SWITCH | Connector_Wire:SolderWirePad_1x01_SMD_1x2mm | TP4 |
| 1 | MCP73831-2-OT | Package_TO_SOT_SMD:SOT-23-5 | U3 |
| 1 | OLED_SCL | Connector_Wire:SolderWirePad_1x01_SMD_1x2mm | TP7 |
| 1 | OLED_SDA | Connector_Wire:SolderWirePad_1x01_SMD_1x2mm | TP6 |
| 1 | POWER SWITCH | slide_switch_12D00:Slide_Switch_SS-12D00 | SW5 |
| 1 | RESET | Button_Switch_SMD:SW_Push_1P1T_NO_6x6mm_H9.5mm | SW4 |
| 1 | RTC_SCL | Connector_Wire:SolderWirePad_1x01_SMD_1x2mm | TP3 |
| 1 | RTC_SDA | Connector_Wire:SolderWirePad_1x01_SMD_1x2mm | TP2 |
| 1 | S2B-PH-SM4-TB(LF)(SN) | jst-ph-2-pin-connector:JST_S2B-PH-SM4-TB(LF)(SN) | J3 |
| 1 | SS14 | SS14:DIOM5227X270N | D1 |
| 1 | SSD1306_ribbon | ribbon_connectors:SSD1306_ribbon | P1 |
| 1 | TPS22919DCKR | TPS22919DCKR:SOT65P210X110-6N | IC1 |
| 1 | TPS63001 | Package_SON:Texas_DRC0010J_ThermalVias | U4 |
| 1 | TYPE-C-31-M-17 | TYPE-C-31-M-17:TYPEC31M17 | J2 |
| 1 | UP | Button_Switch_SMD:SW_Push_1P1T_NO_6x6mm_H9.5mm | SW1 |
| 1 | V_INPUT | Connector_Wire:SolderWirePad_1x01_SMD_1x2mm | TP5 |
The 83 most common of 86 parts.
Questions
How big is the Open authenticator PCB?
It measures 82 × 42 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Open authenticator use?
86 parts, built around the ESP32-WROOM-32, TPS63001DRC, DS3231MZ+ and S2B-PH-SM4-TB(LF)(SN). 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 Open authenticator KiCad files?
From the Open-Authenticator/hardware-design repository on GitHub, at the commit this page was made from: the board is kicad_project/open_authenticator.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Open authenticator design in my own project?
Its repository publishes it under the MIT 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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