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Peripheral unit

kzoropoulos·Fall_Detection_System·hardware/Peripheral_Unit/peripheral-unit.kicad_pcb

Peripheral unit PCB layout, top view — open source Nordic nRF board by kzoropoulos

About the Peripheral unit PCB

Peripheral unit is an open source Nordic nRF PCB design by kzoropoulos, published on GitHub. It is a 2-layer board measuring 77 × 37 mm, with 13 components from 12 distinct parts.

Its main chip is the MDBT50Q-P1M, from the Nordic nRF family. Other key parts include the TPS22860DBVR, TPS7A0233PDBVR and TPS7A0218PDBVR. By type, the board carries 4 ICs, 4 connectors, 2 resistors, 1 battery holder, 1 switch and 1 capacitor.

It belongs with the iot & wireless, sensors and power & battery designs in this gallery.

From the project

A low-power, privacy-friendly elderly fall detection system using 60GHz mmWave radar, PIR sensors, and Zigbee. It features independent room sensors and a resilient central hub for real-time emergency alerts.

Sensor Nodes: Autonomous ceiling-mounted units. They integrate a mmWave radar for point cloud processing, a PIR sensor for hardware wake-up, and a low-power microcontroller. Powered by Lithium Thionyl Chloride (Li-SOCl2) batteries. Central Hub: Data collection and processing unit. It operates as a Zigbee Coordinator, verifies fall events, and routes emergency notifications via Wi-Fi. Supported by an uninterruptible power supply system (Backup battery).

Main components on the Peripheral unit

MDBT50Q-P1MTPS22860DBVRTPS7A0233PDBVRTPS7A0218PDBVR

Peripheral unit bill of materials (BOM)

13 components, 12 distinct parts.

QtyPartRefs
1
MDBT50Q-P1M
U1
1
TPS22860DBVR
U2
1
TPS7A0233PDBVR
U3
1
TPS7A0218PDBVR
U4
1
XM125
J1
1
EKMB1101111
J2
1
Conn_01x09
J3
1
Conn_01x06
J4
1
3.6V
BT1
1
SW_SPST
SW1
1
470μF
C1
2
100kΩ
R1, R2

Peripheral unit design files

The KiCad project lives in the kzoropoulos/Fall_Detection_System repository on GitHub; these links point at the commit this page was built from.

Peripheral unit: common questions

What microcontroller does the Peripheral unit use?

The Peripheral unit is built around the MDBT50Q-P1M, from the Nordic nRF family.

How big is the Peripheral unit PCB?

The Peripheral unit measures 77 × 37 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Peripheral unit?

13 components, from 12 distinct parts. The full bill of materials is listed on this page.

Where can I download the Peripheral unit design files?

From the kzoropoulos/Fall_Detection_System repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Peripheral unit design in my own project?

The repository has no license, so all rights stay with kzoropoulos. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the Peripheral unit without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug Nordic nRF firmware against it before you order a PCB.

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