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Relay module circuit diagram
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![Relay Module Diagram](https://i2.wp.com/www.teachmemicro.com/wp-content/uploads/2018/04/arduino-relay-wiring-diagram.jpg)
Relay Module Diagram
![Electronic Relay Circuit Diagram](https://i2.wp.com/circuitdigest.com/sites/default/files/circuitdiagram/Simple-relay-switch-circuit-diagram_0.png)
Electronic Relay Circuit Diagram
![1 relay module schematic - IOT Wiring Diagram](https://i2.wp.com/protosupplies.com/wp-content/uploads/2017/12/Relay-Module-1-x-5V-Schematic.jpg)
1 relay module schematic - IOT Wiring Diagram
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5 Volt Relay Circuit Diagram
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Relay Module Circuit and Components
![esp8266 - Can I use a 3.3v GPIO to control an opto-isolated 5v relay](https://i2.wp.com/i.stack.imgur.com/04BfF.jpg)
esp8266 - Can I use a 3.3v GPIO to control an opto-isolated 5v relay
![5 Volt 4 Channel Arduino Relay Module example - Arduino Learning](https://i2.wp.com/arduinolearning.com/wp-content/uploads/2017/01/4-channel-relay-module_bb.png)
5 Volt 4 Channel Arduino Relay Module example - Arduino Learning