2 layers44.5 × 42.3 mm Hummingbird, the printed circuit board in 3D

Hummingbird

PCB design files for the Hummingbird kite flight telemetry module

Size: 44.5 × 42.3 mm
Copper layers: 2
Thickness: 1.6 mm
Parts: 41
Nets: 69
Pads: 191
Tracks, vias: 542, 50
Pours: 1
Routed: Yes
KiCad: KiCad 5 (file 20171130)
Created: 2 Jun 2019
Updated: 13 Apr 2020

Overview

Hummingbird is an open-source printed circuit board by tahnok, from the tahnok/hummingbird repository on GitHub. It is a 2-layer board of 44.5 × 42.3 mm with 41 parts on 69 nets, routed with 542 tracks and 50 vias.

It is built around the BMP388, W25Q64JVSSIM and AP2112K-3.3, with the RFM95W-915S2 among its other parts. Its parts include 10 capacitors, 9 resistors, 7 connectors, 6 ICs and 4 diodes. It belongs with the SAM D and SAM boards of this library.

Main components

README

README.md

text

 _   _ _   _ __  __ __  __ ___ _   _  ____ ____ ___ ____  ____  
| | | | | | |  \/  |  \/  |_ _| \ | |/ ___| __ )_ _|  _ \|  _ \ 
| |_| | | | | |\/| | |\/| || ||  \| | |  _|  _ \| || |_) | | | |
|  _  | |_| | |  | | |  | || || |\  | |_| | |_) | ||  _ <| |_| |
|_| |_|\___/|_|  |_|_|  |_|___|_| \_|\____|____/___|_| \_\____/

A lightweight device for capture altitude and other data from a kite

render of board

r1 status: DO NOT PLUG IN A BATTERY

References

BMP388, microSD and Slide switch footprint from Digikey
RFM69 Footprint

Building

The gerbers folder has a zip file if you want to order your own PCB.

There is a bom.csv that contains all the parts and digikey part numbers you need

There's also an interactive_bom.html that is from the excellent InteractiveHtmlBom plugin

Known Issues

Rev 1

Battery connector is wired backwards
microSD footprint is backwards, so it is un-usable
Battery and battery charging to do not work. I plugged one in, immediatly smelled burning. Current theory is that I forgot a current limiting resistor on the LDO's EN pin, so too much current from battery (but not from USB).

Parts

Qty	Value	Footprint	References
4	10k	footprints:R_0603_1608Metric	R4, R8, R9, R10
3	100nF	footprints:C_0603_1608Metric	C6, C7, C8
3	10uF	footprints:C_0603_1608Metric	C1, C2, C3
3	1k	footprints:R_0603_1608Metric	R2, R5, R6
3	LED	footprints:LED_0603_1608Metric	D2, D3, D4
2	100k	footprints:R_0603_1608Metric	R1, R3
2	1uF	footprints:C_0603_1608Metric	C9, C10
2	22pF	footprints:C_0603_1608Metric	C4, C5
1	32.768 Hz	footprints:Crystal_SMD_3215-2Pin_3.2x1.5mm	Y1
1	ANEMOMETER	footprints:PinSocket_1x03_P2.54mm_Vertical	J2
1	AP2112K-3.3	footprints:SOT-23-5	U2
1	ATSAMD21G18A-AUT	footprints:TQFP-48_7x7mm_P0.5mm	U4
1	Antenna	footprints:PinSocket_1x01_P2.54mm_Vertical	J8
1	BMP388	BMP388:PQFN50P200X200X80-10N	U6
1	D_Schottky	footprints:D_0603_1608Metric	D1
1	Expansion	footprints:PinSocket_1x06_P2.54mm_Vertical	J4
1	JST	footprints:PinHeader_2x1mm_P2mm_SMD_RA	J1
1	MCP73831-2-OT	footprints:SOT-23-5	U1
1	RFM95W-915S2	footprints:RFM69HCW-XXXS2	U5
1	SWD_PROG	footprints:PinSocket_1x05_P2.54mm_Vertical	J5
1	SW_DPDT_x2	footprints:Switch_Slide_JS202011SCQN	SW1
1	USB_B_Micro	footprints:USB_Micro_B_Female_10118194-0001LF	J3
1	W25Q64JVSSIM	footprints:SOIC-8_5.23x5.23mm_P1.27mm	U3
1	XIN32	footprints:TestPoint_Pad_D1.0mm	TP2
1	XOUT32	footprints:TestPoint_Pad_D1.0mm	TP1
1	microSD	microSD_503182-1852:MOLEX_503182-1852	J6

The 40 most common of 41 parts.

Questions

How big is the Hummingbird PCB?

It measures 44.5 × 42.3 mm and has 2 copper layers, 1.6 mm thick.

What parts does the Hummingbird use?

41 parts, built around the BMP388, W25Q64JVSSIM, AP2112K-3.3 and RFM95W-915S2. 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 Hummingbird KiCad files?

From the tahnok/hummingbird repository on GitHub, at the commit this page was made from: the board is hummingbird.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.

Can I use the Hummingbird design in my own project?

Its repository states no licence, so its author keeps all rights: ask tahnok before reusing the design.

Category and platform

SAM D and SAM

Project files

Show this board on your page

A live frame, for any web page

<iframe src="https://pcbkit.io/embed/boards/tahnok-hummingbird" title="Hummingbird in PCBKit" width="100%" height="480" style="border:0;border-radius:12px" allow="fullscreen" loading="lazy"></iframe>

A picture

<img src="https://pcbkit.io/embed/boards/tahnok-hummingbird.jpg" alt="Hummingbird" width="1200" height="900">

A picture that opens the board, for a README

[![Hummingbird](https://pcbkit.io/embed/boards/tahnok-hummingbird.jpg?size=s)](https://pcbkit.io/boards/tahnok-hummingbird)

Source

Repository: tahnok/hummingbird
Board file: hummingbird.kicad_pcb
Commit: b3221cf
Licence: Not stated

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