Learn Arduino in 30 Minutes (video): http://robojax.com/L/?id=135
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This video shows the voltage issue with the 16 channel relay module that is sending unregulated input voltage to the relays.

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Learn Arduino from a proven instructor with 100s of projects, code, wiring diagram  in structured course in one place. Purchase Arduino Course at Udemy.com : http://robojax.com/L/?id=153
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16 Channel Relay Arduino code (full details)
http://bit.ly/16channel-relay

Get schematic diagram for this module:
http://bit.ly/16chRelay-Schematic

Learn Arduino in 30 Minutes (video): http://robojax.com/L/?id=135

Tutorial by Ahmad Shamshiri form Canada
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Learn Arduino from a proven instructor with 100s of projects, code, wiring diagram…

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