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2 layers55.5 × 33 mmQfr, the printed circuit board in 3D

A replacement controller for the CM Quickfire Rapid

Size
55.5 × 33 mm
Copper layers
2
Thickness
1.2 mm
Parts
18
Nets
39
Pads
119
Tracks, vias
410, 31
Pours
2
Routed
Yes
KiCad
KiCad 5 (file 20200724)
Created
7 Aug 2020
Updated
3 May 2021

Overview

Qfr is an open-source printed circuit board by evyd13, from the evyd13/quackfire-controller repository on GitHub, published under the CC-BY-SA-4.0 licence. It is a 2-layer board of 55.5 × 33 mm with 18 parts on 39 nets, routed with 410 tracks and 31 vias.

It is built around the ATMEGA32U4. Its parts include 6 capacitors, 6 resistors, 1 IC, 1 connector and 1 crystal. It belongs with the AVR (ATmega, ATtiny) boards of this library.

Main components

1

README

README.md

Quackfire controller rev1

This is a replacement controller for the CM Quickfire Rapid. Everything works, except for the WinLock LED (which isn't connected to the controller).

Building

If you feel like building a few of these PCBs yourself, go to the 'Releases' tab and download the latest gerber files. Order those at your favourite PCB manufacturer, get the components needed (see below) and solder them on! A hot air station is not required but a good soldering iron is. Flux is recommended.

Opening the project

To open the files you will need the latest KiCAD nightly version.

Bill of materials (BOM)

Amount is per PCB, multiply as needed.

LCSC part #DescriptionValuePackageAmount
C83060Capacitor0.1uF06034
C131056Capacitor4.7uF08051
C302042Capacitor1uF06031
C261942Fuse08051
C98220Resistor10K06032
C12028Resistor5.1K06032
C384264Resistor2206032
C44854MCU32U4QFP-441
C341521Resonator16MHzSMD1
2x10 2.00mm pin headerTHT2

Parts

18
QtyValueFootprintReferences
40.1uKeeb_components:C_0603C103, C104, C105, C106
210kKeeb_components:R_0603R101, R102
21kKeeb_components:R_0603R105, R106
222Keeb_components:R_0603R103, R104
116mhzKeeb_components:Resonator_SMD_muRata_CSTNExxV-3Pin-p1.2X1
11uKeeb_components:C_0603C108
14.7uKeeb_components:C_0805C107
1ATmega32U4Keeb_components:ATMEGA32U4U1
1ISPKeeb_components:isp_standardJ1
1Leftfootprints:PinHeader_2x10_P2.00mm_VerticalH1
1Polyfuse_SmallKeeb_components:R_0805F1
1Rightfootprints:PinHeader_2x10_P2.00mm_VerticalH2

Questions

How big is the Qfr PCB?

It measures 55.5 × 33 mm and has 2 copper layers, 1.2 mm thick.

What parts does the Qfr use?

18 parts, built around the ATMEGA32U4. 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 Qfr KiCad files?

From the evyd13/quackfire-controller repository on GitHub, at the commit this page was made from: the board is qfr.kicad_pcb and its schematic qfr.kicad_sch. PCBKit opens the board in the browser, with nothing to install.

Can I use the Qfr design in my own project?

Its repository publishes it under the CC-BY-SA-4.0 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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