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Control Up to 65,280 Relays with Your Arduino! - Hackster.io
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![Arduino Ethernet Web Server Relay | Random Nerd Tutorials](https://i2.wp.com/randomnerdtutorials.com/wp-content/uploads/2017/03/Schematicsfinal.png)
Arduino Ethernet Web Server Relay | Random Nerd Tutorials
![KY-019 5V Relay Module - ArduinoModulesInfo](https://i2.wp.com/arduinomodules.info/wp-content/uploads/Arduino_KY-019_Keyes_5v_relay_module_connection_diagram-1024x652.png)
KY-019 5V Relay Module - ArduinoModulesInfo
![DIY Arduino Relay Driver Shield PCB](https://i2.wp.com/circuitdigest.com/sites/default/files/circuitdiagram_mic/Circuit-Diagram-for-DIY-Arduino-Relay-Driver-Shield-PCB.png)
DIY Arduino Relay Driver Shield PCB
![esp8266 - Can I use a 3.3v GPIO to control an opto-isolated 5v relay](https://i2.wp.com/arduino-direct.com/docs/4-relay-shield-diagram.jpg)
esp8266 - Can I use a 3.3v GPIO to control an opto-isolated 5v relay
![Basic Arduino relay shield example - Arduino Learning](https://i2.wp.com/arduinolearning.com/wp-content/uploads/2016/06/relaysld_02.jpg)
Basic Arduino relay shield example - Arduino Learning
![Simple Relay Shield for Arduino](https://i2.wp.com/duino4projects.com/wp-content/uploads/2013/04/Schematic-Arduino-Relay-Shield.jpg)
Simple Relay Shield for Arduino
![Arduino Project: Tiny Relay Shield](https://i2.wp.com/startingelectronics.org/projects/arduino-projects/arduino-tiny-relay-shield/stripboard-shield-relay.png)
Arduino Project: Tiny Relay Shield
![5V Single-Channel Relay Module, Pinout Diagram - Components Monofindia](https://i2.wp.com/components.monofindia.com/wp-content/uploads/2021/07/3-4.jpg)
5V Single-Channel Relay Module, Pinout Diagram - Components Monofindia
![Relay Shield v3 | Seeed Studio Wiki](https://i2.wp.com/files.seeedstudio.com/wiki/Relay_Shield_v3.0/img/Two-relay-shields-one-arduino.png)
Relay Shield v3 | Seeed Studio Wiki