To actually power and control the entire circuit, [Martyn] used an Arduino loaded up with a program ... and warning indicators working with the LED bar array / tachometer, everything will look ...

We don’t really need most of the components on top of the chip (especially the status LED on the SCK line ... That one is a full Arduino, but the circuit board has no substrate.

It can function as a remote control, a Bluetooth gamepad, or even a smart automation device—all tailored to individual needs.