The TPA3118 class D amplifier IC is a leap in terms of audio quality....
Extruder Fan for Creality 3D Ender-3.
Thermistor/sensor for the nozzle on Ender-3
Creality 3D T-nut for Z axis threaded rod.
The Shield Shield converts the footprint and pins of your Photon or Core into that of an Arduino, allowing for use of existing Arduino shields and accessories.