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Blew up my new duetwifi
Posted: Mon Feb 20, 2017 1:38 pm
by wguibas
Just blew up the T0 input on the duetwifi. My machine has the HE280 hotend and I forgot the connections for T0 are keyed to provide ground to the accelerometer board. 12V backfed to the analog pin on the 3.3v atmel chip and the input in no longer. Just a warning to others.
Re: Blew up my new duetwifi
Posted: Mon Feb 20, 2017 7:27 pm
by Xenocrates
There's a SMD fuse on the Duet wifi, I think F1, near the processor. You may be able to desolder and replace it, as it's intended to protect the processor from that very set of issues.
Re: Blew up my new duetwifi
Posted: Mon Feb 20, 2017 9:15 pm
by wguibas
Thank you, didn't think it was the fuse, but it was. When it first happened the bed temp was still working so I thought I blew the input not the fuse. Still a little puzzled about it.
Re: Blew up my new duetwifi
Posted: Mon Feb 20, 2017 9:42 pm
by Xenocrates
I don't know how it works either, but I suspect nothing short of wizardry from Dave and Tony.