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2 layers87.5 × 48.7 mmBlahkey, the printed circuit board in 3D

Cute blahaj PCB keychain

Size
87.5 × 48.7 mm
Copper layers
2
Thickness
1.6 mm
Parts
12
Nets
9
Pads
31
Tracks, vias
49, 1
Pours
1
Routed
Yes
KiCad
KiCad 9.0 (file 20241229)
Created
3 Apr 2025
Updated
3 Apr 2025

Overview

Blahkey is an open-source printed circuit board by cheyao, from the cheyao/blahkey repository on GitHub, published under the Zlib licence. It is a 2-layer board of 87.5 × 48.7 mm with 12 parts on 9 nets, routed with 49 tracks and 1 via.

Its parts include 4 resistors, 4 diodes and 3 switches.

README

README.md

Blahkey

Cute blahaj shaped keychain. Who doesn't want one in their hands?

Schematic

PCB

Check out https://solder.hackclub.com/ to build a PCB, and get it made for free!

Parts

12
QtyValueFootprintReferences
4LEDLED_THT:LED_D3.0mmD1, D2, D3, D4
4RResistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_HorizontalR1, R2, R3, R4
3SW_PushButton_Switch_THT:SW_PUSH_6mmSW1, SW2, SW3
1Battery_CellBattery:BatteryHolder_Multicomp_BC-2001_1x2032BT1

Questions

How big is the Blahkey PCB?

It measures 87.5 × 48.7 mm and has 2 copper layers, 1.6 mm thick.

What parts does the Blahkey use?

12 parts. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.

Where can I download the Blahkey KiCad files?

From the cheyao/blahkey repository on GitHub, at the commit this page was made from: the board is src/blahkey.kicad_pcb and its schematic src/blahkey.kicad_sch. PCBKit opens the board in the browser, with nothing to install.

Can I use the Blahkey design in my own project?

Its repository publishes it under the Zlib licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).

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