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![8 Channel 5V Relay Module - Wiki](https://i2.wp.com/wiki.sunfounder.cc/images/c/cb/Cha2.jpg)
![8 Channel LPT relay board - Electronics-Lab](https://i2.wp.com/www.electronics-lab.com/wp-content/uploads/2015/03/schematic12.gif)
8 Channel LPT relay board - Electronics-Lab
![MicroPython: Relay Module Web Server ESP32/ESP8266 | Random Nerd Tutorials](https://i2.wp.com/randomnerdtutorials.com/wp-content/uploads/2019/12/relay-esp8266-wiring.png?quality=100&strip=all&ssl=1)
MicroPython: Relay Module Web Server ESP32/ESP8266 | Random Nerd Tutorials
![5V Four-Channel Relay Module - Pin Diagram, Specifications](https://i2.wp.com/components101.com/sites/default/files/inline-images/Four-Channel-Relay-Module-Application-Circuit.png)
5V Four-Channel Relay Module - Pin Diagram, Specifications
![ESP8266 8-Channel Relay Module Home Automation - Hackster.io](https://i2.wp.com/hacksterio.s3.amazonaws.com/uploads/attachments/570798/schematic_8-ch-esp8266_sheet-1_20180906105752_sSbok6wL3A.png)
ESP8266 8-Channel Relay Module Home Automation - Hackster.io
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5V 4 Channel Relay Module Four-Channel Relay Module | Majju PK
![Wiring Bluetooth HC06 in 8 Channel Relay with Android & Arduino](https://i2.wp.com/www.14core.com/wp-content/uploads/2017/01/Bluetooth-Relay-Commander-Wiring-Diagram-Android-14core-Schematics-wiring-Guide-8-Channel-Relay-Module.jpg)
Wiring Bluetooth HC06 in 8 Channel Relay with Android & Arduino
![8 Channel Relay Board - Electronics-Lab](https://i2.wp.com/www.electronics-lab.com/wp-content/uploads/2015/04/8_Channel_Relay_Top.jpg)
8 Channel Relay Board - Electronics-Lab
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relay JD-VCC connection
![arduino - Replace some LEDs with diodes in relay circuit - Electrical](https://i2.wp.com/i.stack.imgur.com/muvpl.png)
arduino - Replace some LEDs with diodes in relay circuit - Electrical