Monday, 22 September 2025

Plinky Synth 4U DIY Expander - build notes

 These are my build notes for the Plinky Synth expander.

The Plinky synth is an 8 voice, polyphonic touch synth.


I'm building the expander for a friend.

Links













This is the 4HP expander (not the 2HP version).

The LEDs are pre soldered.
as are most of the components.


I soldered in the Jacks 1st.
There are 2 green ones for the MIDI ... they go above the USB connector (at the top of the PCB).



This 8 pin header connects the two boards.
solder it next














there is a 10pin header... euro power?
Not sure if this is needed if you are powering from the Plinky.
i soldered it in anyway.

The 16 pin header connects to the plinky













Some final pics.
A  really easy build!
















a side on view.


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