Quantity   Component name
1 × Monitor/led TV You can find used/dismissed ones very cheap
1 × Raspberry PI 3b+
1 × Raspebby power supply
1 × HDMI short cable or VGA / DVI cable plus HDMI to VGA / DVI adapter if your monitor has not an HDMI input
2 × Pushbuttons One for the shutdown of PI, the other for the black / white background switching
2 × Pedals I used two musical keyboard's hld/sustain pedals. normally open
1 × Various connectors, wires, small boxes, screw etc