2 layers57 × 55.2 mm
LogicAnalyzer
gusmanb/logicanalyzer
24 channel, 100Msps logic analyzer hardware and software
10 parts5.1kGPL-3.0
2 layers80 × 50 mm
Mailsensor
code2344/mailsensor- Size
- 80 × 50 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 10
- Nets
- 27
- Pads
- 61
- Tracks, vias
- 58, 8
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 13 Apr 2026
- Updated
- 5 May 2026
Overview
Mailsensor is an open-source printed circuit board by code2344, from the code2344/mailsensor repository on GitHub. It is a 2-layer board of 80 × 50 mm with 10 parts on 27 nets, routed with 58 tracks and 8 vias.
Its parts include 3 ICs and 2 resistors. It belongs with the nRF52 and nRF5x boards of this library.
README
README.mdmailsensor
mailsensor is a letterbox sensor pad so I can know when my mail arrives. also has anti theft alerts. it connects using bluetooth.
made for hack club stasis
BOM
| Name | Purpose | Quantity | Total Cost (USD) | Link | Distributor |
|---|---|---|---|---|---|
| Reed switch | Detecting doors opening | 3 | 7.35 | https://www.jaycar.com.au/miniature-glass-reed-switch/p/SM1002 | Jaycar |
| Force sensitive resistor | weighing the mail to see if there is any | 1 | 8.2 | https://core-electronics.com.au/force-sensitive-resistor-5kg.html | Core electronics |
| Seeeduino Xiao nRF52840 | Microcontroller | 1 | 19.25 | https://core-electronics.com.au/seeed-studio-xiao-nrf52840-pre-soldered-bluetooth-5-0-ble-wireless-iot-microcontroller-board.html | Core electronics |
| PCB | Main circuit board | 5 | 4 | JLCPCB |
Parts
10| Qty | Value | Footprint | References |
|---|---|---|---|
| 3 | SW_Reed | TestPoint:TestPoint_2Pads_Pitch2.54mm_Drill0.8mm | DISABLE, MAIN DOOR, TOP DOOR |
| 1 | 10k | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R1 |
| 1 | BAT | TestPoint:TestPoint_Pad_2.0x2.0mm | VBAT (+) |
| 1 | FSR | TestPoint:TestPoint_2Pads_Pitch2.54mm_Drill0.8mm | R2 |
| 1 | GND | TestPoint:TestPoint_Pad_2.0x2.0mm | GND |
| 1 | MCP1700x-330xxTT | Package_TO_SOT_SMD:SOT-23 | U2 |
| 1 | Seeeduino Xiao nRF52840 | PCM_marbastlib-xp-promicroish:Xiao_nRF52840_ACH | U1 |
| 1 | ~ | TP4056:TP4056-18650 | U3 |
Questions
How big is the Mailsensor PCB?
It measures 80 × 50 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Mailsensor use?
10 parts. 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 Mailsensor KiCad files?
From the code2344/mailsensor repository on GitHub, at the commit this page was made from: the board is MailSensor.kicad_pcb and its schematic MailSensor.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Mailsensor design in my own project?
Its repository states no licence, so its author keeps all rights: ask code2344 before reusing the design.
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