This is the driver electronics which I use for 9 piezo discs.

5x L298N H-bridge

12x WAGO 221 - 415

1x LM2596 DC DC converter

1x Arduino UNO

Jumper wires

1.5mm² wires

0.75mm² wires

3D printed spacers

3D printed WAGO mounts

M3x20 screws & nuts

M5x10 screws & nuts

Zip ties

Everything is mounted on a plasma-cutted 2mm aluminium plate which can later be attached to the finished printer.