I have the same issue. No power to d8 and d10 and now i figured that my hot end thermistor is ded. So everything would be fine once i replace the thermistor?by Usman1222 - RAMPS Electronics
What would happen if i plug in ramps having nothing connected to it with arduino and then plug in the usb cable to the computer, then turn on the power supply to test the board? Also is it safe to first connect usb cable to computer then turn on the power supply or is there some better way of using arduino with ramps?by Usman1222 - Reprappers
What would happen if i make all the connections and use a 16.6 amp power supply, lets assume its a cheap power supply?by Usman1222 - Reprappers
Is a 12 volts 16.6 ampere power supply enough for prusa mk2. I have connected 5 stepper motors, 2 endstops, 2 thermistors, a heated bed, cooling fan and a hot endby Usman1222 - Reprappers
I checked for continuity and my multimeter gave a beep. I set it to 200 ohm and it gave 1.3 ohm. Still is there a possibiloty that it may have shorted?by Usman1222 - Reprappers
Its 0.3 ohm when i test for continuity but when i test it at 200 ohm then i get 1.3 ohm. One important thing that i have found out now is that on one of the boards that i have d8 led lights up when i have no wire connected to it. And when i connect heat bed onto D8 then the led never comes on.by Usman1222 - Reprappers
0.03 ohm and it beeps when i test for continuityby Usman1222 - Reprappers
Even with the bed it gives same readingsby Usman1222 - Reprappers
I am getting less than 12volts without connecting heated bedby Usman1222 - Reprappers
Hello i ordered a ramps 1.4 board and had an issue with bed heating so i measured the voltage from ground to (+) of D8,D9,D10 and it was 12volts which is boards input voltage. Then i messured the voltage from (+) to ground of D8,D9,D10 and i got 2-2.5 volts. Therefore i changed the mosfets and now i get 4.44 volts. When the load (heated bed, fan) is connected then the voltage across + and - termby Usman1222 - Reprappers