Hi, i just ask how i can control 40 relays on the web.? What will i do
Are all of the 40 relays in the same location or all different locations?
http://uselect-el.ucoz.com/pics/robospider_page2.jpg - I made such project on mega2560 + ethernet shield.
You need 40 buttons
mega2560 has > 48 outputs
+ethernet shield