DRIVING A RELAY WITH AN ARDUINO

thingiverse

It appears that the text is an Instructable guide on how to build a simple Arduino-controlled relay circuit. Here's a summary of the steps: **Step 1: Introduction** * The author introduces the project and explains that it will show how to control a relay with an Arduino. **Step 2: Gather Components** * The author lists the components needed for the project, including an Arduino board, a relay module, a breadboard, jumper wires, and a diode. **Step 3: Connect Relay Module** * The author explains how to connect the relay module to the Arduino board and the breadboard. **Step 4: Connect Electromagnet** * The author shows how to connect the electromagnet coil to the relay module. **Step 5: Add Diode** * The author explains why a diode is needed across the electromagnet coil and how to add it to the circuit. **Step 6: Assembly** * The author provides step-by-step instructions on how to assemble the circuit, including connecting the VIN and GND pins of the Arduino to the breadboard, connecting one of the coils pin to the +ve 5v rail of breadboard, adding a diode across the electromagnet coil, connecting the Collector of the NPN transistor to the 2nd pin of the coil, and finalizing the connections. **Step 7: The Code** * The author explains how to write the code for the Arduino to control the relay. The code is very simple and involves defining the digital pin number 2 of the Arduino as the Relay pin, setting the pinMode as OUTPUT in the setup section of the code, and turning on and off the relay after every 500 CPU cycles by setting the Relay pin to HIGH and LOW respectively. **Step 8: Conclusion** * The author provides some important notes about using relays, including the importance of placing a diode across the coil of the relay to prevent damage from electromagnetic interference (EMI) and under-rating the relay to mitigate the risk of relay failures. **Step 9: Thanks** * The author thanks the viewers for watching and invites them to subscribe to their channel for more videos.