HardLabs

Player melodic

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

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

About the Player melodic PCB

Player melodic is an open source STM32 PCB design by bmurauer, published on GitHub. It is a 2-layer board measuring 18 × 100 mm, with 30 components from 20 distinct parts.

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

TL072STM32G030F6PxMCP4822NCP1117-5.0_SOT223MCP1700x-330xxTT

Player melodic bill of materials (BOM)

30 components, 20 distinct parts.

QtyPartRefs
1
TL072
U1
1
STM32G030F6Px
U2
1
MCP4822
U3
1
NCP1117-5.0_SOT223
U4
1
MCP1700x-330xxTT
U5
1
BC847
Q1
1
SWD header
J1
1
1-0802FBV0T
Midi Fast Bus
TAD
J2
3
~
J3, J4, J5
1
5k
RV1
1
SW_Push
SW1
1
LED
D1
4
100nF
C1, C2, C3, C5
2
10μF
C4, C6
2
1uF
C7, C8
3
10k
R1, R2, R3
2
1k
R4, R6
1
100R
R5
1
18k
R7
1
4.7k
R8

Player melodic 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 melodic: common questions

What microcontroller does the Player melodic use?

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

How big is the Player melodic PCB?

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

How many components are on the Player melodic?

30 components, from 20 distinct parts. The full bill of materials is listed on this page.

Where can I download the Player melodic 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 melodic 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 melodic 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.

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