USB Power for Voronoi blowball Flower - Lighted Decoration

Adaptation for https://www.thingiverse.com/thing:2940151
I have adapted the really great LED flower and equipped it with a micro USB connector. The LED flower can now light up permanently.
To reduce the voltage to the recommended 3.5V, two normal diodes must be connected in series.

Additionally required:
2 diodes
Micro USB socket (5 pieces about EUR 1, -):
https://www.ebay.at/itm/5Pcs-Female-Micro-USB-zu-DIP-Adapter-Konverter-2-54mm-PCB-Breakout-BoaAB/153090448632
or
https://www.bang