HardLabs

Leonardo

eltorio·leonardo

Leonardo PCB layout, top view — open source AVR/Arduino board by eltorio
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About the Leonardo PCB

Leonardo is an open source AVR/Arduino PCB design by eltorio, published on GitHub under the CC-BY-SA-4.0 license. It is a 2-layer board measuring 68.6 × 53.3 mm, with 56 components from 36 distinct parts.

Its main chip is the ATMEGA32U4-XUMU, from the AVR/Arduino family. Other key parts include the REG1117-5, LMV358IDGKR, ATMEGA32U4-XUAU and LP2985-33DBVR. By type, the board carries 15 capacitors, 7 resistors, 5 ICs, 4 connectors, 4 diodes and 3 LEDs.

From the project

Arduino Leonardo schematic ported to Kicad

If you appreciate my work, please consider giving it a star! 🤩

[comment]: <> (generated from html bom with https://www.convertsimple.com/convert-html-to-markdown/) Component Count: 56

Leonardo, from the project README
From the project README

Main components on the Leonardo

REG1117-5LMV358IDGKRATMEGA32U4-XUMUATMEGA32U4-XUAULP2985-33DBVR

Leonardo bill of materials (BOM)

56 components, 36 distinct parts.

QtyPartRefs
1
REG1117-5
TI
IC1
1
LMV358IDGKR
TI
IC2
1
ATMEGA32U4-XUMU
Microchip
U1
1
ATMEGA32U4-XUAU
Microchip
U2
1
LP2985-33DBVR
TI
U3
1
16MHz KX-7
Y1
1
USBMICRO
Amphenol
J1
2
8x1F-H8.5
Sullins
J2, J3
1
6x1F-H8.5
Sullins
J4
1
POWERSUPPLY_DC21MMX
EXTPOWER0
1
MF-MSMF050-2 500mA
Bourns
F1
3
DNP
FID1, FID2, FID3
2
DNP
GND0, VUSB0
1
ICSP
TE
ICSP0
1
10x1F-H8.5
Sullins
JP1
1
OTG
Samtex
JP2
1
TS07-667-30-BK-160-SMT-TR
CUI
RESET0
1
FDN340P
UMW
T1
2
CG0603MLC-05E
Bourns
Z1, Z2
1
Green
Lite-on
ON0
Show 16 more
QtyPartRefs
2
Yellow
Lite-on
RX0, TX0
1
M7
D1
1
1N4148W-TP
MCC
D2
2
DNP
D+0, D-0
1
Yellow
Lite-on
L0
2
MH2029-300Y
Bourns
L1, L2
6
100n
Kemet
C1, C2, C6, C9, C13, C22
2
22p
Kemet
C3, C4
4
1uF
Kemet
C5, C7, C11, C14
3
10u
Kemet
C8, C10, C12
1
1M
Bourns
R1
2
NM
R2, R3
1
10K
Bourns
R4
1
10K
Bourns
RN1
1
1K
Bourns
RN2
1
22R
Bourns
RN3

Leonardo design files

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

Leonardo: common questions

What microcontroller does the Leonardo use?

The Leonardo is built around the ATMEGA32U4-XUMU, from the AVR/Arduino family.

How big is the Leonardo PCB?

The Leonardo measures 68.6 × 53.3 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Leonardo?

56 components, from 36 distinct parts. The full bill of materials is listed on this page.

Where can I download the Leonardo design files?

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

Can I use the Leonardo design in my own project?

Yes, under the terms of its CC-BY-SA-4.0 license, which eltorio chose for the repository.

Can I test firmware for the Leonardo 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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