4 Channel Relay Shield for Arduino UNO SF_Encoders This durable arduino weather station

This durable arduino weather station kit includes an anemometer

*SPI Digital Interface

and secures a safe flight

the spontaneous light OLED display does not require a backlight

4 Channel Relay Shield for Arduino UNO SF_Encoders This durable arduino weather stationThis Relay Shield for Arduino acts like a switch. It is commonly used to control anything over 5V such as lamps, water pumps and garage doors. One of the most interesting projects for your boards is perhaps being able to control High power devices like Lamps, water pumps, garage doors and so on. But interfacing with high power and AC is quite a dangerous task when building the circuitry. Relays allow for interfacing an external electrical circuit like