Hi everyone
I'm having some problems getting my capacitive sensor working with my Melzi 2.0 and I was hoping to get some feedback from you.
I bought a LJC18A3-B-Z/BY PNP NO Capacitive sensor from
Ebay and since it's a PNP it switches over the negative side:
So I found a nice guide over at
reddit that explained that I should connect it as follows:
brown: +12v
blue: z-stop pin closer to bed temp
black: z-stop pin closer to y-stop
Looking at the schematic of the Melzi it looks correct since the pin closest to bed temp is grounded and the other one is the signal one.
The problem is that when I position it in the right place and the sensor closes my chip (the big one) on the melzi gets super hot... I've just changed cards since my old Melzi died on me and I'm afraid this is the reason! When the sensor isn't closed (ie. far away from the glass) the chip is cold as it should be!
So... anyone have some ideas?