Reply To: MPCNC 2.8w $100 laser add-on complete

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Kyle
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Hello I was following your write up and I am at the point where I am testing the TTL output after switching D9 to Pin 44 and when my Ramps is getting power from my computer it reads 4.90 volts but when I have it plugged into my power supply 12 volt 30 amp regulated power supply it reads 6.30 volts anyone have advice on this?

Thanks.