An internal battery mod for the Elektron Digitakt II
A USB-C-charged 3S battery fitted inside a Digitakt II for around 50, with boost and buck converters and a BMS. The maker used Claude to debug the build.
Earliest dated source:
The full story
After selling their OP-1 and OP-Z, the maker wanted a portable Digitakt II, so they fitted a battery inside it for about 50. Three 21700 cells and a balancing BMS are wired to the Digitakt's DC input before its power switch, so the original switch also cuts the battery and nothing drains while it's off.
Charging is done over USB-C: a Power Delivery trigger board at 9 V feeds a boost converter to 15 V, then a constant-current buck converter to 12.6 V, through a diode that stops the pack feeding back. The maker used Claude to debug the build and to write up the parts list and steps, which they shared with photos and a schematic.
How it was done
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Sources
From a short post by the maker, so the details are as they tell them.
- ElektronMods: Digitakt 2 internal battery modPublished
The maker's thread on Elektronmods, with parts, wiring steps, photos and schematic.
- The project: w3.org
Linked in the post.
- ElektronMods: Digitakt 2 internal battery mod