HardLabs

Sequencer Front

yry-dev·maddie-synths·hardware/maddie-sequencerV2/sequencer_front_pcb/sequencer_front_pcb.kicad_pcb

Sequencer Front PCB layout, top view — open source board by yry-dev
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About the Sequencer Front PCB

Sequencer Front is an open source PCB design by yry-dev, published on GitHub under the MIT license. It is a 2-layer board measuring 38.1 × 95.9 mm, with 33 components from 16 distinct parts.

By type, the board carries 14 resistors, 10 connectors, 7 diodes and 2 switches.

It belongs with the audio designs in this gallery.

From the project

My Open Source / Public Eurorack projects

- More details on each firmware is on my site - More about me at madelyn.sh - You can purchase some of my work from my etsy store

The repo-wide default is MIT (LICENSE.md at the root, © 2026 Madelyn Yeary). Every source file carries a License: notice in its header saying which terms apply to it and where the code came from.

That default is overridden per directory: any directory containing its own LICENSE.md is governed by that file instead, for everything beneath it. The overrides exist because the work there either came from somewhere else or is deliberately released on different terms

Sequencer Front bill of materials (BOM)

33 components, 16 distinct parts — part numbers from the project's BOM.

QtyPartRefs
7
-
THONKICONN
J1, J3, J4, J5, J6, J7, J8
2
-
Conn_01x04_Socket
J9, J10
1
-
Conn_01x11_Socket
J11
1
EC11M
SW1
1
DR630 F1 LFS
SW2
1
SS54
LED
D3
2
SMBJ13A
LED
D4, D5
1
SMBJ6.0A
LED
D6
1
C84256
LED
D7
1
C84260
LED
D8
1
C84261
BZX79-C5V1
D9
1
100K
10kΩ
R1
1
3K9
1kΩ
R3
5
1kΩ
R4, R5, R6, R7, R8
6
10kΩ
R11, R12, R13, R14, R15, R16
1
100kΩ
R17

Sequencer Front design files

The KiCad project lives in the yry-dev/maddie-synths repository on GitHub; these links point at the commit this page was built from.

Sequencer Front: common questions

How big is the Sequencer Front PCB?

The Sequencer Front measures 38.1 × 95.9 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Sequencer Front?

33 components, from 16 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 Sequencer Front design files?

From the yry-dev/maddie-synths repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.

Can I use the Sequencer Front design in my own project?

Yes, under the terms of its MIT license, which yry-dev chose for the repository.

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