HardLabs

Precision

kwan3217·kicad·Precision/Precision.kicad_pcb

Precision PCB layout, top view — open source AVR/Arduino board by kwan3217
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About the Precision PCB

Precision is an open source AVR/Arduino PCB design by kwan3217, published on GitHub under the GPL-2.0 license. It is a 2-layer board measuring 76.2 × 76.2 mm, with 156 components from 24 distinct parts.

Its main chip is the ATmega32U4-MU, from the AVR/Arduino family. Other key parts include the MIC5319 3.3V. By type, the board carries 122 diodes, 10 resistors, 9 capacitors, 5 connectors, 4 jumpers and 2 ICs.

From the project

KiCad versions of my circuits

Many of my boards have the Open Source Hardware logo on them. Using this logo requires having an open source license and publishing the source. In order to support this, I have the URL of this repository engraved onto the boards themselves.

I have made a release for the Wearable Pocketometer boards, and intend to make a release each time I have a board made.

All boards which have been released since September 2020 have enough information to construct a bill of materials. This is in the form of Digikey part numbers attached to each part in the KiCad .sch files.

Main components on the Precision

ATmega32U4-MUMIC5319 3.3V

Precision bill of materials (BOM)

156 components, 24 distinct parts.

QtyPartRefs
1
ATmega32U4-MU
U301
1
MIC5319 3.3V
U401
1
16MHz
Y316
1
M06PTH
J101
2
M04PTH
J102, J103
2
Conn_01x08
J104, J105
1
KwanSystems
G101
1
STANDOFF
JP101
3
STAND-OFF
JP102, JP103, JP104
1
B3U-1000P
S102
1
RESET
S313
60
HOUR
D000, D001, D002, D003, D004, D005, D006, D007 +52
60
MIN
D100, D101, D102, D103, D104, D105, D106, D107 +52
1
RED
D308
1
green
D322
2
1uF
C306, C401
1
10uF
C309
3
100nF
C314, C334, C404
2
22pF
C316, C317
1
2.2uF
C405
Show 4 more
QtyPartRefs
3
10k
R101, R313, R333
4
47
R102, R103, R104, R105
1
22
R303
2
1k
R308, R322

Precision design files

The KiCad project lives in the kwan3217/kicad repository on GitHub; these links point at the commit this page was built from.

Precision: common questions

What microcontroller does the Precision use?

The Precision is built around the ATmega32U4-MU, from the AVR/Arduino family.

How big is the Precision PCB?

The Precision measures 76.2 × 76.2 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Precision?

156 components, from 24 distinct parts. The full bill of materials is listed on this page.

Where can I download the Precision design files?

From the kwan3217/kicad repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the Precision design in my own project?

Yes, under the terms of its GPL-2.0 license, which kwan3217 chose for the repository.

Can I test firmware for the Precision without the hardware?

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

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