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Raspberry Pi GPIO Control

Former Member

I saw a picture on flickr, which interests me vey much. I want to make a same one, as I want to learn some more about GPIO control.

I got the raspberry Pi and this exact 8 channel relay. How can I do the wire up? There are many cables, I am a bit confused,

image

Parents

  • Looking at the pic it seems like they've got an RTC, unecessary for  the relay, a Pi Cobbler from adafruit and a level converter which you can also get from adafruit. The nice thing about those relays is you drive them to ground to activate, but it is still probably a good idea to isolate your pi from the relay board.

     

    But follow the advice from Charles and look at those resources. You will find that the circuit pictured is pretty easy to replicate.

     

     

    Mike

Reply

  • Looking at the pic it seems like they've got an RTC, unecessary for  the relay, a Pi Cobbler from adafruit and a level converter which you can also get from adafruit. The nice thing about those relays is you drive them to ground to activate, but it is still probably a good idea to isolate your pi from the relay board.

     

    But follow the advice from Charles and look at those resources. You will find that the circuit pictured is pretty easy to replicate.

     

     

    Mike

Children
  • in reply to mconners

    Eleen

    That relay board you linked to is unlikely to work, without something between the Pi and the relays.

     

    The board states it requires 15-20mA to control the relays, but a reviewer found it was 3.8mA.

    However it uses 5v and is derived by a regulator from the 12v required to run the relays.

    The GPIO is 3v3, so you will need something else between the Pi and the relays.

     

    The picture appears to show an opto-coupled relay board, which has a better chance and is isolated.

     

    These only require 2mA to control these and are available in 2,4 or 8 relays.

    http://yourduino.com/sunshop2/index.php?l=product_detail&p=218

     

     

     

    Mark