Hello everyone i have a question.
At school i am having a project about 3D printing. For this we building an extruder that can print solder. I bought an arduino mega 2580 & an ramps 1.4 motherboard. At school and at home i tested a lot on the manually controlled power supply an it works al just fine. But suddenly on a specific controlled power supply the power supply was actinf weard, just giving 3Volt and 2 A while it should gave 12V. After trying again at the same testikg station my arduino couldnt find my com anymore. So i just bought a new one and started testing again. Still no problems at home and 2 other different testing stations. After all other testing spots were taken by other students we went to the same where we fried last time. The exact same thinf happend! Now is my question how is this possible? Could it be something in the powersupply? Pls help me!