Activity Forums Questions & Troubleshooting Setup & Installation 24V LED Stripe connected with Controllino MAXI

  • 24V LED Stripe connected with Controllino MAXI

  • Crackers

    February 24, 2021 at 7:36 am

    Hey everyone,

    I’ve been working on a small project but have been stuck for almost a week now. I simply cannot figure out what is going wrong.

    I was trying to connect a 4 wire 24V LED stripe with the controllino. I connected the + wire with +24V and each color light of the LED stripe with D0, D1 and D2 (OUTPUT) of my controllino.

    But when I turn the OUTPUTS high the LED doesn’s shine. I use digitalWrite(CONTROLLINO_D0); in my code with the respected controllino library. The controllino even shows that the port is open.

    When I connect the + wire from the LED with the – wire of my power supply it starts to shine immediatly.

    Do you have any idea what I’m doing wrong and why I cannot control the LED through my Controllino?

    Many thanks in advance!

  • mr-controllino

    February 24, 2021 at 7:53 am


    The “problem” is that the digital outputs of the MAXI are High-Side switches. So, they are like a normal switch … they will switch the supply voltage to the output when “HIGH” … and they are “OFF” or disconnected when “LOW”.

    If you have a LED stripe like yours with common 24V … you need a switch that pulls to GND.

    3 Possibilities:

    1) You can switch to the CONTROLLINO MEGA … it has 12 Half-Bridges (they will switch to “GND” when “LOW”.

    2) You can buy another LED strip with common Ground.

    3) If you only want to switch ON-OFF the LED Strip … you can use the Relays.


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