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Author: Grace


Working principle of relay module

When the relay works, the electromagnet is energized, and the keeper is drawn down to make D and E contact, and the working circuit is closed. The electromagnet loses its magnetism when it loses power, and the spring pulls the keeper up to cut off the working circuit. Therefore, a relay is a switch that uses an electromagnet to control a working circuit.


dht11 temperature and humidity sensor working principle

The dht11 temperature and humidity sensor working principle by passing the temperature and humidity in the air through a certain detection device. After the temperature and humidity are measured, they are converted into electrical signals or other required information output according to certain rules.

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