HardLabs

Player drum velocity

bmurauer·cynthia·05_midi_to_cv/player_drum_velocity/player_drum_velocity.kicad_pcb

Player drum velocity PCB layout, top view — open source STM32 board by bmurauer

About the Player drum velocity PCB

Player drum velocity is an open source STM32 PCB design by bmurauer, published on GitHub. It is a 2-layer board measuring 18 × 100 mm, with 32 components from 17 distinct parts.

Its main chip is the STM32G030F6Px, from the STM32 family. Other key parts include the TL072, NCP1117-5.0_SOT223, MCP1700x-330xxTT and MCP4822. By type, the board carries 9 resistors, 8 capacitors, 6 connectors, 5 ICs, 2 transistors and 1 switch.

It belongs with the audio designs in this gallery.

From the project

Plans for my modular synthesizer

This is a multi-board MIDI-to-CV system: one conductor module reads MIDI from several TRS inputs and broadcasts it to a chain of players, each of which is an independent module that turns the messages it cares about into CV/gate signals. The number and type of players is flexible, so the system can be grown or reconfigured after the initial build.

The guiding principle is that the conductor is deliberately dumb. It does not know what players exist, does not track which one handles what, and holds no state about them. It parses MIDI and passes it on; every player decides for itself whether a…

Main components on the Player drum velocity

TL072STM32G030F6PxNCP1117-5.0_SOT223MCP1700x-330xxTTMCP4822

Player drum velocity bill of materials (BOM)

32 components, 17 distinct parts.

QtyPartRefs
1
TL072
U1
1
STM32G030F6Px
U2
1
NCP1117-5.0_SOT223
U3
1
MCP1700x-330xxTT
U4
1
MCP4822
U5
2
BC847
Q1, Q2
1
1-0802FBV0T
Midi Fast Bus
TAD
J1
1
SWD header
J2
4
~
J3, J4, J5, J6
1
SW_Push
SW1
1
LED
D1
4
100nF
C1, C2, C3, C8
2
10μF
C4, C5
2
1uF
C6, C7
4
10k
R1, R2, R3, R4
4
1k
R5, R6, R7, R8
1
4.7k
R9

Player drum velocity design files

The KiCad project lives in the bmurauer/cynthia repository on GitHub; these links point at the commit this page was built from.

Player drum velocity: common questions

What microcontroller does the Player drum velocity use?

The Player drum velocity is built around the STM32G030F6Px, from the STM32 family.

How big is the Player drum velocity PCB?

The Player drum velocity measures 18 × 100 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Player drum velocity?

32 components, from 17 distinct parts. The full bill of materials is listed on this page.

Where can I download the Player drum velocity design files?

From the bmurauer/cynthia repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Player drum velocity design in my own project?

The repository has no license, so all rights stay with bmurauer. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the Player drum velocity without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug STM32 firmware against it before you order a PCB.

More boards in cynthia

Similar boards