HardLabs

Kakuhomaru bridge

penk·Kakuhomaru-bridge·kicad/kakuhomaru-bridge.kicad_pcb

Kakuhomaru bridge PCB layout, top view — open source board by penk

About the Kakuhomaru bridge PCB

Kakuhomaru bridge is an open source PCB design by penk, published on GitHub under the MIT license. It is a 2-layer board measuring 43.2 × 18.5 mm, with 10 components from 1 distinct parts.

It belongs with the audio designs in this gallery.

From the project

The Kakuhomaru Bridge is a piezoelectric pickup for electric violins.

The Kakuhomaru (角宝丸) bridge is a piezoelectric pickup for electric violins, designed with a ‘one-sensor-per-string’ approach to capture each note with clarity and richness.

🔊 Listen to the open string sample here:

https://github.com/penk/Kakuhomaru-bridge/assets/61878/6f59927d-60b6-4801-80bd-5c879a68bae8

Each Kakuhomaru bridge is composed of 4 main parts:

1. Piezoelectric rods and shielded cable (repurposed from guitar undersaddle pickups). 2. 3D printable case (available in both low profile and high profile). 3. Custom printed circuit board (PCB) with castellated holes. 4. Semi-rigid…

Kakuhomaru bridge, from the project README
From the project README

Kakuhomaru bridge bill of materials (BOM)

10 components, 1 distinct parts.

QtyPartRefs
10
Conn_01x01
J1, J2, J3, J4, J5, J6, J7, J8 +2

Kakuhomaru bridge design files

The KiCad project lives in the penk/Kakuhomaru-bridge repository on GitHub; these links point at the commit this page was built from.

Kakuhomaru bridge: common questions

How big is the Kakuhomaru bridge PCB?

The Kakuhomaru bridge measures 43.2 × 18.5 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Kakuhomaru bridge?

10 components, from 1 distinct parts. The full bill of materials is listed on this page.

Where can I download the Kakuhomaru bridge design files?

From the penk/Kakuhomaru-bridge repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Kakuhomaru bridge design in my own project?

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

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