Hello everybody,
I'm a the first steps with electronics and i need to power 400 micro motors from 5 v with an arduino nano, is it possible to power them in a easy way? or do i have to add a relay for every motor? I have a relay with 16 outputs, may i group them by 16? The mA of every motor are 100 mA at 5 v.
thank you
best regards
If you only want the motors to be either ON or OFF then you could switch several of those tiny motors from a single relay.
Under no circumstances draw power for the motors from the Arduino's 5v pin.
Equally, don't draw power for the relay coils from the Arduino's 5v pin.
...R
Thanks for the quick reply,
From which pin of Arduino should i draw the power for the relays? The motors are at 5 v 100 mA, the A of the relays are 10 A each, could i attach 100 motors to each relay maximum?
ashram78:
From which pin of Arduino should i draw the power for the relays?
None of them. You can use any of the pins for the control signal for the relay but not for the power for the relay coils.
The motors are at 5 v 100 mA, the A of the relays are 10 A each, could i attach 100 motors to each relay maximum?
I'm not sure that they are rated for 10 amps DC - my relays only have AC values printed on them. AC is easier to switch. I was thinking of perhaps 20 per relay - but I am not an expert. A lot depends on how long you need before a relay fails - and it is likely to fail in the ON position.
Another option would be to use a logic-level MOSFET transistor to do the switching - but I am not in a position give detailed advice about that.
...R