2 layers50 × 100 mm
2 layers50 × 80 mm
- Size
- 50 × 80 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 29
- Nets
- 30
- Pads
- 111
- Tracks, vias
- 329, 26
- Pours
- 3
- Routed
- Yes
- KiCad
- KiCad 7 (file 20221018)
- Created
- 30 Aug 2023
- Updated
- 22 Dec 2024
Overview
KEY is an open-source printed circuit board by Tomas0015, from the Tomas0015/System-Q repository on GitHub. It is a 2-layer board of 50 × 80 mm with 29 parts on 30 nets, routed with 329 tracks and 26 vias.
It is built around the WT8266-S1, AP63203WU and 74LVC138AD, with the BC846 and BC857 among its other parts. Its parts include 6 resistors, 5 capacitors, 5 connectors, 3 ICs and 3 transistors.
Main components
5
WT8266-S1
SMD-40℃~+85℃ -98dBm 2.4GHz 215mA 3V~3.6V 56mA ESP8266 UART、SDIO、SPI、I2C、GPIO SMD WiFi Modules ROHSWireless-tagWiFi Modules
AP63203WU
TSOT-23-6-40℃~+85℃@(TA) 1 1.1MHz 22uA 2A 3.3V 3.8V~32V Buck Built-in Fixed Overcurrent Protection、Light load efficient mode、Cycle-by-cycle current limiting、Hiccup current limiting、EMI optimization (spread spectrum) Step-down type Yes TSOT-23-6 DC-DC Converters ROHSDiodes IncorporatedDC-DC Converters74LVC138AD
-- Signal Switches, Multiplexers, Decoders ROHSNexperiaSignal Switches, Multiplexers, Decoders
BC846
SOT-23-65℃~+150℃ 1 NPN 100mA 110 15nA 250mW 400mV 65V 6V 770MHz NPN SOT-23 Bipolar (BJT) ROHSNexperiaBipolar (BJT)BC857
SOT-231 PNP 100MHz 100mA 15nA 200mW 45V 5V 650mV 800 PNP SOT-23 Bipolar (BJT) ROHSSTMicroelectronicsBipolar (BJT)
README
README.mdSystem-Q
System Q is an open source security system, based on the ESP microcontroller, with wireless and wired bus capabilities.
I like cheese
We hate cloud with a passion so there will not be a cloud integration developed by us, the most you will get is a GSM modem sending out SMS messages.
Central control unit
-doesn't actually control anything, only contains a power supply and a battery.
Parts
29| Qty | Value | Footprint | References |
|---|---|---|---|
| 3 | 10K | Resistor_SMD:R_0603_1608Metric | R1, R2, R8 |
| 2 | 100n | Capacitor_SMD:C_0603_1608Metric | C2, C4 |
| 2 | 10k | Resistor_SMD:R_0603_1608Metric | R3, R4 |
| 2 | 22u | Capacitor_SMD:C_0603_1608Metric | C3, C5 |
| 2 | BC846 | Package_TO_SOT_SMD:SOT-23 | Q1, Q2 |
| 1 | 10u 50V | Capacitor_SMD:CP_Elec_5x5.3 | C1 |
| 1 | 3V3 | TestPoint:TestPoint_Pad_1.5x1.5mm | TP2 |
| 1 | 4u7 | Inductor_SMD:L_Ferrocore_DLG-0504 | L1 |
| 1 | 74LVC138 | Package_SO:TSSOP-16_4.4x5mm_P0.65mm | U3 |
| 1 | 820 | Resistor_SMD:R_0603_1608Metric | R5 |
| 1 | AP63203WU | Package_TO_SOT_SMD:TSOT-23-6 | U1 |
| 1 | BATT_EXT | Connector_PinSocket_2.54mm:PinSocket_1x04_P2.54mm_Horizontal | J2 |
| 1 | BC857 | Package_TO_SOT_SMD:SOT-23 | Q3 |
| 1 | BUS | TerminalBlock:TerminalBlock_Altech_AK300-4_P5.00mm | J1 |
| 1 | Buzzer | LPT2270AS buzzer:LPT2270AS | BZ1 |
| 1 | FLASH/CONF | Connector_PinSocket_2.54mm:PinSocket_1x06_P2.54mm_Horizontal | J3 |
| 1 | KEYB | Connector_PinSocket_2.54mm:PinSocket_1x07_P2.54mm_Horizontal | J5 |
| 1 | RFID | Connector_PinSocket_2.54mm:PinSocket_1x06_P2.54mm_Horizontal | J6 |
| 1 | TestPoint | TestPoint:TestPoint_Pad_1.5x1.5mm | TP3 |
| 1 | WT8266-S1 | WT8266:WT8266-S1 | U2 |
| 1 | buzzer test | TestPoint:TestPoint_Pad_1.5x1.5mm | TP5 |
| 1 | tamper switch | Button_Switch_THT:SW_PUSH_6mm | SW1 |
| 1 | tamper test | TestPoint:TestPoint_Pad_1.5x1.5mm | TP1 |
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Questions
How big is the KEY PCB?
It measures 50 × 80 mm and has 2 copper layers, 1.6 mm thick.
What parts does the KEY use?
29 parts, built around the WT8266-S1, AP63203WU, 74LVC138AD and BC846. 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 KEY KiCad files?
From the Tomas0015/System-Q repository on GitHub, at the commit this page was made from: the board is KEY/KEY.kicad_pcb and its schematic BATT/batt.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the KEY design in my own project?
Its repository states no licence, so its author keeps all rights: ask Tomas0015 before reusing the design.