HardLabs

Link adapter

jkominek·piano-conversion·hardware/link-adapter/link-adapter.kicad_pcb

Link adapter PCB layout, top view — open source board by jkominek
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About the Link adapter PCB

Link adapter is an open source PCB design by jkominek, published on GitHub under the Custom license license. It is a 2-layer board measuring 77.5 × 40.6 mm, with 38 components from 24 distinct parts.

Other key parts include the ISL83490 and FT230XS. By type, the board carries 14 resistors, 9 connectors, 8 capacitors, 2 ICs, 2 diodes and 1 transistor.

It belongs with the audio and sensors designs in this gallery.

From the project

Hardware, and some firmware, for acoustic piano to MIDI controller conversion.

adc-board An STM32H743 reading 22 ADC channels and sending the results over RS485. led-power Provides power to 8 strings of 22 CNY70 IR LEDs. Needs +48V. Optional I2C control. led-test-bar For development only: little bar that holds a bunch of LEDs for testing the LED power board. link-adapter For development only: allows a PC to connect to an ADC or main board. main-board 8 ADC boards can plug in, their processed signals are managed by another STM32H743 and converted to MIDI in its various forms. Intended mainly for USB use, also has ethernet designed in. For all of the optional accessories…

Main components on the Link adapter

ISL83490FT230XS

Link adapter bill of materials (BOM)

38 components, 24 distinct parts.

QtyPartRefs
1
ISL83490
U1
1
FT230XS
U2
1
NX7002BKW
Q1
1
ToADC
J1
1
ToMaster
J2
1
USB_B
J3
1
FTDI Header
J4
1
PowerJumper
J5
1
CBUS
J6
1
FORLED
J7
1
AltUSB
J8
1
CurrentProbe
J9
1
MPWRGOOD
TP1
2
LED
D1, D2
1
MPZ2012S601AT000‎
FB1
4
0.1uF
C1, C2, C7, C8
1
4.7uF
C3
1
10nF
C4
2
47pF
C5, C6
2
27
R1, R2
Show 4 more
QtyPartRefs
9
6000
R3, R4, R5, R6, R7, R8, R9, R10 +1
1
620
R11
1
3000
R12
1
120
R14

Link adapter design files

The KiCad project lives in the jkominek/piano-conversion repository on GitHub; these links point at the commit this page was built from.

Link adapter: common questions

How big is the Link adapter PCB?

The Link adapter measures 77.5 × 40.6 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Link adapter?

38 components, from 24 distinct parts. The full bill of materials is listed on this page.

Where can I download the Link adapter design files?

From the jkominek/piano-conversion repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the Link adapter design in my own project?

It is published under Custom license, which limits how it may be reused; read the license before building on it.

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