24V LED Stripe connected with Controllino MAXI

[Crackers]

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]

Hi,

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.

regards
Marco