4 layers15.2 × 27.2 mm
Riotee Module
NessieCircuits/Riotee_Module
Design Resources for the Riotee Module
93 parts1CERN-OHL-W-2.0
2 layers46.4 × 18.8 mm
Densor nfc v2
TUDSSL/densor3Densor is an intraoral sensor platform, attached to regular dental retainers or aligners, that can take measurements inside the mouth.
- Size
- 46.4 × 18.8 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 25
- Nets
- 50
- Pads
- 136
- Tracks, vias
- 394, 46
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 7 (file 20221018)
- Created
- 28 Sep 2022
- Updated
- 21 Nov 2025
Overview
Densor nfc v2 is an open-source printed circuit board by TUDSSL, from the TUDSSL/densor repository on GitHub, published under the MIT licence. It is a 2-layer board of 46.4 × 18.8 mm with 25 parts on 50 nets, routed with 394 tracks and 46 vias.
It is built around the AM1805AQ, LIS2DW12 and ST25DV04K-JFR6D3, with the TS3A44159PW and BAS316 among its other parts. Its parts include 8 capacitors, 5 ICs, 4 resistors, 3 diodes and 3 connectors. It belongs with the radio and wireless boards and the STM32 boards of this library.
Main components
5AM1805AQ
QFN-16_3mmx3mmQFN-16_3mmx3mm New Arrivals ROHSAMBIQUncategorised
LIS2DW12
LGA-12(2x2)-40℃~+85℃ 1.62V~3.6V 16bit 50nA Accelerometer Motion event detection SPI、I2C X,Y,Z ±16g LGA-12(2x2) Accelerometers ROHSSTMicroelectronicsAccelerometers
ST25DV04K-JFR6D3
UDFN-12-EP(3x3)1.8V~5.5V 53Kbit/s I2C ISO 15693,NFC UDFN-12-EP(3x3) RFID ICs ROHSSTMicroelectronicsRFID ICs
TS3A44159PW
TSSOP-16-40℃~+85℃ 1.65V~4.3V 164pF 22ns 2:1 300mΩ 35MHz 4 50ns TSSOP-16 Analog Switches, Multiplexers ROHSTexas InstrumentsAnalog Switches, Multiplexers
BAS316
SOD-3231.25V@150mA 100V 250mA 400mW 4A 4ns 500nA@80V Independent SOD-323 Switching Diodes ROHSNexperiaSwitching Diodes
README
README.mdDensor
About the project
Densor is an intraoral sensor platform, attached to regular dental retainers or aligners, that can take measurements inside the mouth.
Rationale
At present, in mouth measurements are typically made with external tools and in a controlled labaratory setting. Thus, real data from users daily lives is missing. To overcome this, we propose using widely used deltal retainers (or aligners), and enhance them with the Densor sensing platform. This way data is collected from inside the mouth without external tools.
Features
- Contactless transmission: Densor is completely sealed and interacts with a smartphone via NFC protocol.
- Energy harvesting: To stay powered Densor harvests energy, either from the NFC communication itself or from the temperature gradient between the body and cold water.
- Free of external hardware: Operating Densor does not require any specialized tools, other than a NFC-compatible smartphone.
Project layout
This repository contains the design (both hardware and software) of two versions of Densor, based on the source of energy harvesting. Each version of the project is contained in its own folder:
- Densor with NFC-based energy harvesting from a smartphone, as presented in this research article;
- Densor with thermoelectric energy harvesting from drinking cold water.
Copyright
Copyright (C) 2024 TU Delft Embedded Systems Group/Sustainable Systems Laboratory.
MIT License or otherwise specified. See license file for details.
Parts
25| Qty | Value | Footprint | References |
|---|---|---|---|
| 6 | 100n | Capacitor_SMD:C_0603_1608Metric | C4, C5, C6, C7, C12, C13 |
| 3 | 100k | Resistor_SMD:R_0603_1608Metric | R2, R3, R4 |
| 2 | C_Polarized | antennas:CPX3225A | C1, C2 |
| 1 | AM1805 | Package_DFN_QFN:QFN-16-1EP_3x3mm_P0.5mm_EP1.7x1.7mm | U2 |
| 1 | BAS316 | Diode_SMD:D_SOD-323 | D2 |
| 1 | Conn_01x04_Pin | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical | J3 |
| 1 | Conn_01x08_Pin | antennas:fpc_503480-0800 | J2 |
| 1 | Conn_ARM_JTAG_SWD_10 | Connector_PinHeader_1.27mm:PinHeader_2x05_P1.27mm_Vertical | J1 |
| 1 | Crystal | antennas:ABS05W_Crystal | Y1 |
| 1 | D_Photo | antennas:pd_vemd1060x01 | D3 |
| 1 | D_Zener_3v3 | Diode_SMD:D_SOD-323F | D1 |
| 1 | LIS2DW12 | Package_LGA:Kionix_LGA-12_2x2mm_P0.5mm_LayoutBorder2x4y | U5 |
| 1 | LOGO | antennas:tooth_5mm | G*** |
| 1 | R | Resistor_SMD:R_0603_1608Metric | R7 |
| 1 | ST25DV04K-JFR6D3 | ST25DV04K-JFR6D3:PSON50P300X300X60-13N | U1 |
| 1 | STM32L011F3Ux | Package_DFN_QFN:ST_UFQFPN-20_3x3mm_P0.5mm | U4 |
| 1 | TS3A44159 | antennas:RSV16 | U6 |
Questions
How big is the Densor nfc v2 PCB?
It measures 46.4 × 18.8 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Densor nfc v2 use?
25 parts, built around the AM1805AQ, LIS2DW12, ST25DV04K-JFR6D3 and TS3A44159PW. 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 Densor nfc v2 KiCad files?
From the TUDSSL/densor repository on GitHub, at the commit this page was made from: the board is NFC_harvester_battery_free/hardware/Densor_kicad_project/densor_nfc_v2.kicad_pcb and its schematic NFC_harvester_battery_free/hardware/Densor_kicad_project/densor_nfc_v2.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Densor nfc v2 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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