20Pcs 3.3V 5V DIP Illuminated Momentary Tactile Push Button Switch With LED Light 12×12mm Multicolor (Red/Green/Blue/White) For Arduino, Sparkfun,

20Kg Load Cell Weight Sensor Electronic Kitchen Scale + HX711 AD Weighing Module Geekstory

Joinfworld Waterproof Micro Limit Switch With Long Straight Hinge Lever SPDT 3 PIN Pre-Wired 10A 125 250V Micorswitch For Arduino, Appliance And

Bluestars Pack Of 10 V-153-1C25 Micro Limit Switch Blade Momentary 250VAC/125VDC 15A Perfect For Arduino, Appliance And General Electrical Equipment

Hiletgo 24V 8 Channel Relay Module With OPTO-Isolated High And Low Level Trigger 8 Ways Relay Switch Module For Arduino