Hi,
I need to supply 5v to a relay in order turn it on.
But IO’s provide 3.3v right?
Is there a way I can turn on/off the 5v on output on the panda?
Or is there another way I can solve this problem, without having to add extra components?
Hi,
I need to supply 5v to a relay in order turn it on.
But IO’s provide 3.3v right?
Is there a way I can turn on/off the 5v on output on the panda?
Or is there another way I can solve this problem, without having to add extra components?
I would absolutely not recommend you to drive a relay directly from your fez pin.
The proper way would be to do it like this:
Do NOT forget the diode placed over the relay contacts.
It’s there to protect your other electronics (including panda)
I’ll check that link
In the mean time I found that we have 3v triggered relays as well,
I should still not conect these directly?
No, you won’t
So,
meanwhile I found solid state relays that are switched using something between 3v and 32v.
And that seems to be working.
But I’m really not an electronic kind of person, so I don’t really know what I’m doing
I’m not supposed to just connect the pins from my panda to the relay (even though that works)
Can someone tell me why that is?
I should also note, it’s a solid state relay.
ANV SSR -40DA
Even with a solid state relay you should use the diode described before for inducting loads.
And if you do not know what you are doing, you should do some research
Relays are notorious for back-current, which is why you put a diode over the terminals. When the circuit “breaks”, the back-current can zap your uC or whatever is controlling it if oyu don’t use a diode.