Is it possible to connect an RRD fan extender and a BL-Touch on the

3D Printing
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1

Is it possible to connect an RRD fan extender and a BL-Touch on the Ramps 1.4 together?

They seem to need to share the same pins…

I’m using Marlin for my firmware.

2

Move the rrd over 2 pins and you have to remap if I remember correctly but it can be done

3

Any instructions how to remap?

4

If you shift the fan board up one or two pins, leaving D11 uncovered, you can use both. If you have the RRD fan extender (usually white) just shift it up one pin to leave D11 uncovered. Only one of the two channels on the fan extender will work, and it will be D4. If you have the Geetech fan extender (usually red) shift it two pins. Both channels will work, and they will be on D4 and D5. Connect the print fan to the one on D4.

sourced from the ITTY BITTY FAQ about dual exturders