What Connector for Individual Pins on Expansion Port?
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@Phaedrux said in What Connector for Individual Pins on Expansion Port?:
The zprobe.in pin is 30v tolerant
good point! I'll need to check the bltouch output before testing that.
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@gaweyo BLTouch is 3.3 or 5. No worries there.
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BLTouch should work with the black and white wires connected to an endstop input.
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@Phaedrux said in What Connector for Individual Pins on Expansion Port?:
@gaweyo BLTouch is 3.3 or 5. No worries there.
yeah, but it needs to be 3.3 to use the expansion port (or add protection), so that might depend on the version of the bltouch if I'm not wrong. the most recent should be fine.
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@gaweyo Anything past a V1 BLTouch should be fine. And recent Duets past 1.02 board rev should be fine either way.
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@Phaedrux said in What Connector for Individual Pins on Expansion Port?:
And recent Duets past 1.02 board rev should be fine either way
not for the E2 endstop on the 50-pin expansion, it goes straight to the processor if I'm not mistaken - as such needs 3.3v (or open drain + internal pullup)? only using the 50 pin expansion to simplify wiring to a single connector was my thinking
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@gaweyo right sorry missed you were referring to the expansion port. Though it would be unusual to use the expansion board for the trigger signal when there is a dedicated z probe port or io_in port available.
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@Phaedrux so can I wire this up as shown in the original picture on this post?
I started to look at the configuration tool and I got a warning that something needs to be set to 3.3v or I risk destroying my board...
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The warning is a hold over from the original BLtouch (and maybe some clones that copy the original design) and early Duet boards that weren't 5v tolerant. There was a resistor to add or a trace to cut. So as I said, Anything past a V1 BLTouch should be fine. And recent Duets past 1.02 board rev should be fine either way.
What BLTouch version and what Duet PCB version do you have?
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@Phaedrux the BL Touch says Smart V3.1
And the Duet 2 Ethernet is v1.04b according to the box it shipped in.
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@tmeryhew Then you are good to go.
