So straight to the problem

I need to connect My RPi's GPIO to a (or some) relay(s) that consume around 30 - 60 Amps to fire up and RPi GPIO only give around 16 mA/Pin(Accroding to this).

My question is,what is the safest and best way to connect the GPIO to a relay with 60A of input ?


P.S. : I dont know (almost) anything about electricity and english is not my native language.So i'm sorry if there are any mistakes around here

  • 2
    You must be mistaken. A relays control circuit taking 30 Amps sound terribly wrong. – Ghanima Sep 18 '14 at 6:30
  • 30 Amps consumption for a relay? Please review that. – Kangkan Sep 18 '14 at 7:24
  • Yeah i kinda choked on my tea when i read this, check your power consumption, because anything higher than even .5ma pull i use and external plugpack. – Pariah Sep 19 '14 at 2:45
  • Reviewed,and @Pariah sorry for your tea – Tommy Aria Pradana Sep 19 '14 at 4:18
  • By any chance what is the application for? Because there is no way a raspberry pi will ever output more than 15-50mA on any one pin at any given time, in saying that look up a digitally controlled relay, H-bridge or a irf640-Irfz44 (mosfet) for controlling a switch of any sort. – Pariah Sep 19 '14 at 4:24

Add a transistor to your rpi and the relay to the transistor. This should work.

In case you don't know as much as me - watch this: https://www.youtube.com/watch?v=-td7YT-Pums then you do.

If you could supply some numbers of the parts you are using, we can throw together a drawing for you. But right now it would just be a search in the dark.

| improve this answer | |
  • A diagram and a little more detail would improve your answer and help others who may not know as much as you do. – Steve Robillard Sep 18 '14 at 8:32

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