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2 Channel relay board - OSHWLab
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1 relay module schematic
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2 channel relay module
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5v 4 channel relay module four-channel relay module
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Relay module pin diagram
Relay datasheet pinout 5v connected follows loads .
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![How a Relay Module Works and Interfacing a Single Channel Relay Module](https://i2.wp.com/circuitdigest.com/sites/default/files/inlineimages/u5/Single-Channel-Relay-Module-Pinout.jpg)
How a Relay Module Works and Interfacing a Single Channel Relay Module
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5v 4 Channel Relay Module Four-Channel Relay Module | Majju PK
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电器工程 - 如何正确使用带有 Arduino/Raspberry 的 JD-VCC 的继电器模块? - 吾爱随笔录 - 问答
![8 Channel LPT relay board - Electronics-Lab.com](https://i2.wp.com/www.electronics-lab.com/wp-content/uploads/2015/03/schematic12.gif)
8 Channel LPT relay board - Electronics-Lab.com
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Arduino lesson – 2-Channel Relay Module « osoyoo.com
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4-channel relay module circuit diagram 4-channel relay driver circuit
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2 CHANNEL RELAY MODULE - iFuture Technology