HardLabs

Heart

CesarOtoniel·charlieplexedHeart

Heart PCB layout, top view — open source AVR/Arduino board by CesarOtoniel

About the Heart PCB

Heart is an open source AVR/Arduino PCB design by CesarOtoniel, published on GitHub under the Apache-2.0 license. It is a 2-layer board measuring 53.8 × 20.9 mm, with 19 components from 3 distinct parts.

Its main chip is the ATtiny13A-P, from the AVR/Arduino family. By type, the board carries 13 test points, 5 resistors and 1 IC.

From the project

Charlieplexed LED sequencer with the shape of a heart. Intended to be mounted on wired LED sign and not on the PCB.

Charlieplexed LED sequencer with the shape of a heart ___ Board:

Proposed layout: The finished project: [![IMAGE ALT TEXT HERE]](https://youtube.com/shorts/6VQt6mm0j_k?si=q3w5lvo53maSrrU2)

Main components on the Heart

ATtiny13A-P

Heart bill of materials (BOM)

19 components, 3 distinct parts.

QtyPartRefs
1
ATtiny13A-P
U1
13
TestPoint
TP1, TP2, TP3, TP4, TP5, TP6, TP7, TP8 +5
5
R
R1, R2, R3, R4, R5

Heart design files

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

Heart: common questions

What microcontroller does the Heart use?

The Heart is built around the ATtiny13A-P, from the AVR/Arduino family.

How big is the Heart PCB?

The Heart measures 53.8 × 20.9 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Heart?

19 components, from 3 distinct parts. The full bill of materials is listed on this page.

Where can I download the Heart design files?

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

Can I use the Heart design in my own project?

Yes, under the terms of its Apache-2.0 license, which CesarOtoniel chose for the repository.

Can I test firmware for the Heart 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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