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Piface Digital - Relais

Former Member

Hallo zusammen,

 

erstmal zu meinem Setup:

- Raspberry Pi Mod. B

- Piface Digital 2.1

- Raspbian Wheezy 7.2

 

Ich habe dasProblem, wenn ich das erste relais (0) schließe, kann ich das zweite relais (1) nichtmehr ansteuern. Andersherum ist es aber kein Problem. Habe auch schon andere Pifaces getestet, allerdings das gleiche Problem. Hättet ihr da eine Idee?

 

Besten Dank im Voraus :-)

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  • 0

    I would suggest then to take out the auto init at boot time and focus on the code above first, it would be a simple matter to re-establish the auto mode once the debugging is complete. this way you can easily drive the relays on and off manually in order to better understand what is happening

     

    Also did you measure the supply voltages between TP1 and TP2, or on the GPIO connector to see if your experiencing any issues there. I have not seen the schematics for the PI Face so don't know if it is powered from the PI or via a separate adapter. Relays when switching on and off can cause power spikes if suitable protection circuits are not in place, this is why assuming your code is correct, it could be the power issue. make some measurements and let us know

     

     

    thanks

Reply
  • 0

    I would suggest then to take out the auto init at boot time and focus on the code above first, it would be a simple matter to re-establish the auto mode once the debugging is complete. this way you can easily drive the relays on and off manually in order to better understand what is happening

     

    Also did you measure the supply voltages between TP1 and TP2, or on the GPIO connector to see if your experiencing any issues there. I have not seen the schematics for the PI Face so don't know if it is powered from the PI or via a separate adapter. Relays when switching on and off can cause power spikes if suitable protection circuits are not in place, this is why assuming your code is correct, it could be the power issue. make some measurements and let us know

     

     

    thanks

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