Power-Over-Skin-Hardware

kongmunist·Power-Over-Skin-Hardware

Power-Over-Skin-Hardware PCB layout, top view — open source board by kongmunist

About the Power-Over-Skin-Hardware PCB

Power-Over-Skin-Hardware is an open source PCB design by kongmunist, published on GitHub under the CC-BY-NC-4.0 license. It is a 2-layer board measuring 15 × 10.8 mm, with 21 components from 14 distinct parts.

Other key parts include the BQ25570. By type, the board carries 9 capacitors, 7 resistors, 3 inductors and 1 IC.

It belongs with the power & battery designs in this gallery.

From the project

Schematic, PCB, and guide for making your own Power-over-Skin receivers (UIST24)

This repository contains the PCB files for the receiver board from the ACM UIST paper "Power-over-Skin: Full-Body Wearables Powered By Intra-Body RF Energy"

- R1-R7: Voltage setting resistors, should be 1% or better

- L2, L3: buck/boost inductors for the BQ25570. Should handle >200mA saturation current according to BQ25570 datasheet, but we're using low currents so you would probably get away with lower values. We used CB2518T100K and BRC2518T220K

Power-Over-Skin-Hardware, from the project README — From the project README

Main components on the Power-Over-Skin-Hardware

Power-Over-Skin-Hardware bill of materials (BOM)

21 components, 14 distinct parts.

Qty	Part	Footprint	Refs
1	BQ25570	QFN-20-1EP_3.5x3.5mm_P0.5mm_EP2x2mm	U1
1	SMS7630-005LF	SOT-23_SKY	CR1
1	1.8uH	L_0805_2012Metric	L1
1	22uH	L_1008_2520Metric	L2
1	10uH	L_0805_2012Metric	L3
2	4.7uF	C_0402_1005Metric	C1, C6
4	10nF	C_0402_1005Metric	C2, C3, C5, C8
1	100uF	C_0805_2012Metric	C4
1	22uF	C_0603_1608Metric	C7
1	5pF	C_0402_1005Metric	C9
1	1MΩ	R_0402_1005Metric	R1
1	7.5MΩ	R_0402_1005Metric	R2
2	6.8MΩ	R_0402_1005Metric	R3, R6
3	4.3MΩ	R_0402_1005Metric	R4, R5, R7

Power-Over-Skin-Hardware design files

The KiCad project lives in the kongmunist/Power-Over-Skin-Hardware repository on GitHub; these links point at the commit this page was built from.

Layoutpos_rev4_small.kicad_pcb
Schematicpos_rev4_small.kicad_sch

Power-Over-Skin-Hardware: common questions

How big is the Power-Over-Skin-Hardware PCB?

The Power-Over-Skin-Hardware measures 15 × 10.8 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Power-Over-Skin-Hardware?

21 components, from 14 distinct parts. The full bill of materials is listed on this page.

Where can I download the Power-Over-Skin-Hardware design files?

From the kongmunist/Power-Over-Skin-Hardware repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Power-Over-Skin-Hardware design in my own project?

It is published under CC-BY-NC-4.0, which limits how it may be reused; read the license before building on it.

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