2 layers58.2 × 38.1 mm
Usb sniffer
ataradov/usb-sniffer
Low-cost LS/FS/HS USB sniffer with Wireshark interface
87 parts1.3kBSD-3-Clause
2 layers
Hi Hat module based on the Moritz Klien design from youtube
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 12
- Nets
- 8
- Pads
- 34
- Tracks, vias
- 30, 0
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 5 Jul 2026
- Updated
- 5 Jul 2026
Overview
Hi hat is an open-source printed circuit board by thismatters, from the thismatters/EurorackHiHat repository on GitHub. It is a 2-layer board with 12 parts on 8 nets, routed with 30 tracks and 0 vias.
It is built around the BAT54S. Its parts include 2 capacitors, 2 resistors, 2 diodes and 1 connector.
Main components
1README
README.mdHi Hat
This is an implementation the circuit in the Moritz Klien hi hat video with all of the trappings to make it a proper module. The aforementioned video is extremely good and deserves a watch (along with all their other content, top notch).
The KiCAD project here uses the library/footprints found in my companion repo.
Width
6hp on a standard 3U rack.
Inputs
4 Jacks
- Gate
- Open CV (how open is the hi-hat)
- Accent CV
- Tune CV
4 Knobs
- Tone
- Decay
- Tune
- Tune CV
Outputs
1 Jack for audio.
Vendors
There are part numbers in the BOM for many of the parts (not for basic passives though) at the following vendors:
- Mouser: Needs no introduction. Get your ICs from here (or digikey).
- Tayda Electronics: Good supplier for passive components; audio jacks, and potentiometers. Their audio jacks are slightly smaller than the thonkiconn from thonk.
- Love My Switches: Has really good knobs to go on those potentiometers!
- OSHPark: Fast and (relatively) cheap PCB manufacturer. Prototype run pending.
Changelog
Parts
12| Qty | Value | Footprint | References |
|---|---|---|---|
| 3 | mount1 | Eurorack:Mech-MountingHole | H2, H3, H4 |
| 2 | 10 | Resistor_SMD:R_0805_2012Metric | R1, R2 |
| 2 | 22u 50V | Capacitor_THT:CP_Radial_D5.0mm_P2.50mm | C1, C2 |
| 2 | BAT54S | Package_TO_SOT_SMD:SOT-23 | D1, D2 |
| 1 | Conn_02x05_Odd_Even | Eurorack:PinHeader_2x05_P2.54mm_Vertical | J1 |
| 1 | mount0 | Eurorack:Mech-MountingHole | H1 |
The 11 most common of 12 parts.
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Questions
What parts does the Hi hat use?
12 parts, built around the BAT54S. 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 Hi hat KiCad files?
From the thismatters/EurorackHiHat repository on GitHub, at the commit this page was made from: the board is hi-hat.kicad_pcb and its schematic hi-hat.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Hi hat design in my own project?
Its repository states no licence, so its author keeps all rights: ask thismatters before reusing the design.