HardLabs

Labrador backup

EspoTek·Labrador_backup·PCB/Tinylab_proto1.kicad_pcb

Labrador backup PCB layout, top view — open source AVR/Arduino board by EspoTek

About the Labrador backup PCB

Labrador backup is an open source AVR/Arduino PCB design by EspoTek, published on GitHub. It is a 2-layer board measuring 36.8 × 34.7 mm, with 75 components from 28 distinct parts.

Its main chip is the ATXMEGA32A4U-AU, from the AVR/Arduino family. Other key parts include the 78L05, LM324 and DMN63D8LDW. By type, the board carries 32 resistors, 18 capacitors, 11 connectors, 5 ICs, 4 inductors and 2 fuses.

From the project

Backup of the Labrador repo, pre-cleanup.

This is the project page for the EspoTek Labrador.

https://www.crowdsupply.com/espotek/labrador

All hardware files (schematics, PCB) are licenced under Creative Commons 4.0 (CC BY-NC-SA). https://creativecommons.org/licenses/by-nc-sa/4.0/

The intention is to move to a less restrictive licence in future, where commercial hardware derivatives are allowed but the use of the Labrador name or any branding is not. If anyone knows how to implement such a licence, I'm all ears.

Main components on the Labrador backup

ATXMEGA32A4U-AU78L05LM324DMN63D8LDW

Labrador backup bill of materials (BOM)

75 components, 28 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
ATXMEGA32A4U-AU
IC1
1
78L05
U1
1
LM324
U2
2
DMN63D8LDW
U3, U4
1
Q_NMOS_GSD
Q1
2
SCOPE_OUT
P1, P5
1
USB_OTG
P2
1
DIG_OUT
P3
1
PDI/3V3
P4
1
DAC_OUT
P6
1
PSU
P7
1
DIG_IN
P8
1
FUSE_BYPASS
P9
1
EXPANSION
P10
1
SWITCH
P11
2
F_Small
F1, F2
1
D_Schottky
D1
1
LED
D2
1
INDUCTOR
L1
3
INDUCTOR
L2, L3, L4
Show 8 more
QtyPartRefs
12
C
C1, C2, C7, C8, C10, C11, C12, C13 +4
3
C_Small
C3, C4, C5
3
CP1
C6, C9, C15
2
1M
R1, R2
2
75K
R3, R4
15
1K
R5, R6, R15, R16, R17, R18, R19, R20 +7
12
28R
R7, R8, R9, R10, R11, R12, R13, R14 +4
1
100R
R27

Labrador backup design files

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

Labrador backup: common questions

What microcontroller does the Labrador backup use?

The Labrador backup is built around the ATXMEGA32A4U-AU, from the AVR/Arduino family.

How big is the Labrador backup PCB?

The Labrador backup measures 36.8 × 34.7 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Labrador backup?

75 components, from 28 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.

Where can I download the Labrador backup design files?

From the EspoTek/Labrador_backup repository on GitHub, which has the KiCad layout and the BOM; the links under Design files point to each one.

Can I use the Labrador backup design in my own project?

The repository has no license, so all rights stay with EspoTek. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the Labrador backup 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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