Hey there, I have problem with my relay board and timer, I did conection like on video but my lamp don't want turn on, what I did wrong? when shooting cable GND my lamp turn on https://www.youtube.com/watch?v=6gUKDIC2wLI
Sorry Fernando, but I checked this topic I resolved this problem (thank you) It was problem with the connection of relay but the relay don't answer my commands, I put GND > GND Db25 VCC> 5v Db25 CH1> P0
When I change timer 1 to "off" nothing happens thank you pela sua patience
I did not put the test code because the computer does not recognize the ferduino I just did not do anything, just I installed the code and the computer does not recognize now, before normally recognized