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Large-Heart-PCB-LED-Pendant

SaltyPaws·Large-Heart-PCB-LED-Pendant·PCB design/Heart_Pendant_v2.kicad_pcb

Large-Heart-PCB-LED-Pendant layout, top view — open source AVR/Arduino board by SaltyPaws
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About the Large-Heart-PCB-LED-Pendant

Large-Heart-PCB-LED-Pendant is an open source AVR/Arduino PCB design by SaltyPaws, published on GitHub under the MIT license. It is a 2-layer board measuring 202.4 × 142.2 mm, with 32 components from 8 distinct parts.

Its main chip is the ATTINY25-20SU, from the AVR/Arduino family. By type, the board carries 20 diodes, 6 resistors, 2 battery holders, 1 IC, 1 connector and 1 switch.

From the project

Large heart PCB LED pendant using Charlieplexing and ATtiny to introduce STEAM concepts or conquer the heart of of loved one!

Room for improvement: - With the ATtiny 45 there is more memory space. It could be programmed to cycle trough more/longer patterns. - An eye could be added to the 3d printed snap fit case, for pendant usage. Currently only the 3mm hole is available, which may be a bit small for strings. - One of the M3 holes is covered by the switch. However, the case is snap fit and does not need the M3 hardware to stay in place.

Large-Heart-PCB-LED-Pendant, from the project README
From the project README

Main components on the Large-Heart-PCB-LED-Pendant

ATTINY25-20SU

Large-Heart-PCB-LED-Pendant bill of materials (BOM)

32 components, 8 distinct parts.

QtyPartRefs
1
ATTINY25-20SU
U1
1
ISP
J1
2
Battery_Cell
BT1, BT2
1
SW_SPDT
SW1
20
LED
D1, D2, D3, D4, D5, D6, D7, D8 +12
1
C
C1
5
75
R1, R2, R3, R4, R5
1
10k
R6

Large-Heart-PCB-LED-Pendant design files

The KiCad project lives in the SaltyPaws/Large-Heart-PCB-LED-Pendant repository on GitHub; these links point at the commit this page was built from.

Large-Heart-PCB-LED-Pendant: common questions

What microcontroller does the Large-Heart-PCB-LED-Pendant use?

The Large-Heart-PCB-LED-Pendant is built around the ATTINY25-20SU, from the AVR/Arduino family.

How big is the Large-Heart-PCB-LED-Pendant?

The Large-Heart-PCB-LED-Pendant measures 202.4 × 142.2 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Large-Heart-PCB-LED-Pendant?

32 components, from 8 distinct parts. The full bill of materials is listed on this page.

Where can I download the Large-Heart-PCB-LED-Pendant design files?

From the SaltyPaws/Large-Heart-PCB-LED-Pendant repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the Large-Heart-PCB-LED-Pendant design in my own project?

Yes, under the terms of its MIT license, which SaltyPaws chose for the repository.

Can I test firmware for the Large-Heart-PCB-LED-Pendant 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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