How to make IR Sensor Soap Dispenser With Anet ET4 3D Printer

（Materials required） PCB Prototype for $2(Any color): （With code “KJDOTJLC“ will get $5 Discount） PCB file download 5V Water Pump Glass bottle 18350 Battery*2 Flexible Coolant Pipe Anet ET4 3D Printer Anet Online Store： Anet Facebook： Facebook Anet 3D Printer Group： Banggood： Aliexpress： ANE