power help relays vs mosfets

Thread Starter

nico.paul

Joined Feb 2, 2019
3
hello, I want to connect an rpi 3 b+ to 2 12v solenoid locks, a camera and a speaker module and microphone module. I cant figure out what i need transistor wise though. will a 12v 4 channel relay not be enough to power both locks? im beginning to think no and should have gotten 24v. mosfet? im really lost as to when you use one vs the other and if you can use both. aux power jacks: do i connect to the relay of i have one and if i dont the mosfet?
 

MaxHeadRoom

Joined Jul 18, 2013
19,146
Not sure of your circuit, but there is the Omrom MY4ZN 4 pole style relay with 4 contacts.
You could also drive with Mosfets, are these switched simultaneously?
Max.
 

Thread Starter

nico.paul

Joined Feb 2, 2019
3
the 2 12v sols are simultaneous. would i need two mosfets then? each sol will be powered by its own ac wall adapter and i think i need to get a barrel jack that i can hook to either the mosfet or the relay? im newer with electrical engineering and i can confirm its not as easy as some think. haha
 

MaxHeadRoom

Joined Jul 18, 2013
19,146
You should be able to power with one Mosfet, don't forget the reverse diodes across the solenoids.
Also two could be used from the same drive signal.
It helps to post a circuit and component details for definitive answers.
Max.
 
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