Control LED Lighting

pcsentinel · 14 Mar 2017, 18:42

Hi i currently have my led lighting fed from the 5v always on fan connector together with my hot end fan, what would the opinion be on changing the lighting to a spare fan connector so that it can be switched on and off by gcode?

dc42 · 14 Mar 2017, 19:23

Yes, you can drive LEDs from a spare heater or fan connector, both on the Duet and on the DueX expansion boards.

pcsentinel · 26 Mar 2017, 15:26

I'm going back to 24V fans, but still need 5V for my lighting, can I take it from the PanelDue connector?

sigxcpu · 26 Mar 2017, 16:23

I have 12V LED strips and 24V main supply to Duet Wifi.
What I did was to use a cheap buck converter from 24V to 12V, common negative. Use + from the Buck converter and - from the PWM fan output on the Duet. This way I control the case fan (also 12V) and the LED strips.

This trick works for all 12V consumers on a 24V board. The only rule is to make sure that output is low side switched (i.e. the MOSFET is connected between ground and load).

dc42 · 26 Mar 2017, 17:57

@pcsentinel:

I'm going back to 24V fans, but still need 5V for my lighting, can I take it from the PanelDue connector?

Yes.

chojn1 · 27 Mar 2017, 23:27

Sorry for another noob question:
Can I wire two similar 12V LED strips in series to the 24V fan connector and skipping the buck converter?

dc42 · 28 Mar 2017, 06:41

Yes, but make sure the 2 strips are the same length and the and type.