I am trying to drive inkjet printer cartridge using Nucleo F746ZG board. But at the moment i connect cartridge to the nucleo board, Controller heats up very much and over current LED starts blinking and if i continue connection about 10 Minutes then not able to load the code again and board heats up very much. I am attaching my basic circuit connection with cartridge. I am using Relay to start and stop the cartridge supply using the controller. Can someone please suggest whats wrong with my conenction? or what is the reason controller going in overcurrent and overheating condition? Can someone please help
