Cant get 5v from Duet2's expansion header 5v pin.
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Im trying to get a bltouch clone to pull from the duet2's expansion header's 5v and grnound pins #1 & #2. The multimeter is reading only +4.75v from the 5v and GND pins. I am using some Crealty 24v fans for the hotend so have pulled a 24v line to the fan power select center pin and have selected the EXTERNAL jumper and a 5v psu as the EXT 5V power source. Blade fuses check out. I'd like to think that locating the 5v regulator will be the imediate solution however I have noticed that at one point all 5, if not 4, board LED indicators were illuminated. Any suggestions or secret documents that would power up the expansion header?
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Have you tested the other 5v pins on the board? Perhaps Conn_SD?
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@crookid said in Cant get 5v from Duet2's expansion header 5v pin.:
and have selected the EXTERNAL jumper and a 5v psu as the EXT 5V power source
When using external 5V power there is a diode between the external 5V input and the 5V bus on the Duet. That's why you only see 4.75V on the expansion connector. It should be enough for a BLTouch, but if in doubt you could connect the +5V wire of the BLTouch directly to your 5V external power input.
