Digispark HAT for M5StickC

This thing is a prototype for connecting DigiSpark or compatible to M5StickC.
And made with reference to the following site.

Lang-Ship
"Trial of USB keyboard function with M5StickC and DigiSpark(ATTiny85)" by @tnkmasayuki
https://lang-ship.com/blog/?p=1219

-Thanks to Tanaka Masayuki for sharing the details.

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CAD file; at85-c_27.stp (STEP format)
STL files; at85-c_27_top.stl , at85-c_27_btm.stl

-requirement.
Digispark or compatible
a square pice of universal board (8x9 holes, 21x23mm, t=1.6mm)
2.54mm pin header connector
2.54mm pin header right angle
jumper Header (optional)

Please refer to the above site and photos for how to make.

-wiring;
M5StickC Digispark
GND GND
[SDA] GPIO 0 P0
[SCK] GPIO26 P2

optional; jumper Header & 2.54mm pin header connector(3pin)
[. . . ]
[123]

1:=NC
2:=DigiSpark[5V_out]
3:=M5Stick [5V_in]