PC817

5A XL4015 DC-DC Step Down Adjustable 4-38V Power Supply Module LED Lithium

500K potentiometer

25GA310 DC Deceleration Micromotor DC12V100RPM

16 Pin Dip Socket

DC 6V  620 rpm 25GA370 DC Reduction Gear Motor with wheel

Soil Moisture Sensor and Soil Detector Module Soil Moisture Test Soil Humidity Test Corrosion Resistance Probe for Arduino

4N28

Dragino LoRa Shield - support 868M frequency

LTC1871 Boost Power Module High Power DC-DC 100W Adjustable Output 3.5-35v Step up Power Supply Converter Module Board with LED Digital Display Voltmeter  

Kitchen scales weighing sensor 5kg

SN74HC00N