I think most people have wires laying around or can get them fairly easy.
Diy auto bed leveling sensor.
There are several ways to connect the 3dtouch auto leveling sensor to gt2560 here is the easiest way.
I build this z probe for auto bed leveling with existing parts in my bin i don t have a bltouch but it works great and cost almost nothing to.
Meanwhile auto bed leveling ubl is similar but more advanced and lets you create a mesh diagram of the high and low sections of your bed.
I also used some 14ga silicone wire to supply power to the sensor male jumper cables cut in half and soldered to two 22ga silicone wires for the z endstop wires.
It doesn t matter if you cannot find the wires with the same color but do not mix the wires up.
In the slic3r you may want to add the command g28 for auto home and the command g29 for auto bed leveling at the beginning of the program.
So that the height of your extrusion is the correct one.
The nano is just very cheap and fits nicely int.
The two items above are the only purchases i had to make to install auto bed leveling on my ender 3.
Giveaway ended note this could also be done with a different arduino if you don t care so much about looks.
The whole idea is to spend as little and keep it as simple as possible.
Another recommendation is for you to play with the value in.
If you re not so sure marlin auto bed leveling lets you compensate with auto bed leveling bilinear.
Be sure to uncomment your method of choice.
Use dupont wire to extend the wires of 3dtouch.
Mesh bed leveling is a manual process.
You need to use soldering iron here.