Introduction: Arduino - Magnetic Reed Switch KY-021
Hello world! yep yep, i made another simple example project.
This time for the KY-021 Mini reed switch.
It will simply turn on and off a light with a relay by using a magnetic field.
Reed switches are used allot in burglar alarms.
Follow the next step for the Schematic Code & Parts List.
Step 1: Schematic Code & Parts List.
- Arduino Uno, I used the robotdyn Uno.. one with 7 analog pins! Very good stuff! buy it!
- KY-021 Mini reed Switch
- KY-019 1 Channel Relay.
- A magnetic field, can be any magnet but best to use is a small one. Or even better a magnet from a alarm.
- Set of jumper wires. MM/FF/MF
- Lamp + power cable (optional) dont need this! The relay itself will show you if it works by turning on a led.