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8 channel relay board .
ESP8266 8-Channel Relay Module Home Automation - Hackster.io
4-Channel Relay Board
5V 4 Channel Relay Module Four-Channel Relay Module | Majju PK
Steve Baskauf's blog
arduino - Replace some LEDs with diodes in relay circuit - Electrical
8 Channel Relay Board - Electronics-Lab.com
8+channel+relay+board - Search - EasyEDA
How To Make Relay Module Circuit And PCB And Earn Money - Dip
5V 8-Channel Relay Module - Pinout, Features, Working, Applications