hello everybody,
i have bit of problem arduino uno - 8 relay module setup, ebay cheap module, optoisolated.
as can see have external power supply relays connected jdvcc , gnd. arduino 5v goes on vcc , digital pins go on in1- in4. believe set should make arduino , relays isolated each other.
however happens have load on relay (a lamp in case) interference makes mouse on computer freeze pin high, means when appliance (lamp) off. when switches on it's fine mouse works again.
it not matter if supply power arduino computer usb or 12v power supply. mouse freezes anyway. makes me think there must problem mains wiring , know squat that.
i've attached pictures illustrate how wired whole thing. please have look, suggestions , advice welcome.
thank you
i have bit of problem arduino uno - 8 relay module setup, ebay cheap module, optoisolated.
as can see have external power supply relays connected jdvcc , gnd. arduino 5v goes on vcc , digital pins go on in1- in4. believe set should make arduino , relays isolated each other.
however happens have load on relay (a lamp in case) interference makes mouse on computer freeze pin high, means when appliance (lamp) off. when switches on it's fine mouse works again.
it not matter if supply power arduino computer usb or 12v power supply. mouse freezes anyway. makes me think there must problem mains wiring , know squat that.
i've attached pictures illustrate how wired whole thing. please have look, suggestions , advice welcome.
thank you
you did not connect gnd of arduino gnd of relaismodul.
Arduino Forum > Using Arduino > Motors, Mechanics, and Power (Moderator: fabioc84) > 8 Relay Module Wiring - Interference Problem
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