Hello, im new to forum and new to electronics im currently creating an art project and i have hit a dead end.
and am wanting to control 7 house fans switching them on and off.
however the way i have configured them i seem to only be able to power 2 of them before the relay looses power and can't open to switch the 3rd on.
i am using no external power but i feel i should be?
i am connecting
- ardunio dig pin 7 to channel 1 on the relay
- gnd on the ardunio to the ground on the relay
- and using the 5v from the ardunio to run the VCC
the ardunio is an uno?
i also made this today in the hope it would help but it doesn't seem to open the relays just keeps the light on?