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Main board

Windfisch·analog-synth·hardware/control_board_prototype/control_board_prototype.kicad_pcb

Main board layout, top view — open source board by Windfisch
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About the Main board

Main board is an open source PCB design by Windfisch, published on GitHub under the GPL-3.0 license. It is a 2-layer board measuring 98 × 54.4 mm, with 76 components from 20 distinct parts.

Other key parts include the LM317, LM358, TLE2426xLP, BU2505FV and BluePill. By type, the board carries 30 capacitors, 25 resistors, 12 connectors, 5 ICs, 3 jumpers and 1 module.

It belongs with the audio designs in this gallery.

From the project

A low-cost semimodular analog synthesizer

The main board of the synth: It accepts a STM32F103 Blue Pill board and offers two 10-channel DACs. Additionally, it contains a voltage converter, a virtual ground circuit and pin headers for power distribution.

Adjust to R2 to 540 Ohms to get a supply voltage of 10V.

U3 is optional. If U3 is equipped, do not close JP1. (C1, C2, R4 and R5 can be left out in this case.) Otherwise, do close JP1.

Main board, from the project README
From the project README

Main components on the Main board

LM317LM358TLE2426xLPBU2505FVBluePill

Main board bill of materials (BOM)

76 components, 20 distinct parts.

QtyPartRefs
1
LM317
U1
1
LM358
U2
1
TLE2426xLP
U3
2
BU2505FV
U4, U5
1
BluePill
A1
1
Conn_01x17_Male
J1
1
Conn_01x15_Male
J2
1
Conn_01x02_Male
J3
4
Conn_02x10_Odd_Even
J4, J5, J6, J11
3
Conn_02x04_Odd_Even
J7, J9, J12
2
Conn_02x06_Odd_Even
J8, J10
1
SolderJumper_2_Open
JP1
2
Jumper_3_Bridged12
JP2, JP3
4
1u
C1, C2, C3, C4
26
100n
C5, C6, C7, C8, C9, C10, C11, C12 +18
1
220
R1
1
1k
R2
1
1k
R3
2
100k
R4, R5
20
10k
R6, R7, R8, R9, R10, R11, R12, R13 +12

Main board design files

The KiCad project lives in the Windfisch/analog-synth repository on GitHub; these links point at the commit this page was built from.

Main board: common questions

How big is the Main board?

The Main board measures 98 × 54.4 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Main board?

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

Where can I download the Main board design files?

From the Windfisch/analog-synth repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the Main board design in my own project?

Yes, under the terms of its GPL-3.0 license, which Windfisch chose for the repository.

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