I am currently working with a servo and an external power source. I am using an Arduino Nano Every. The external power source is 7 volts so I used a buck converter to convert it to 5 volts before directing it to the main circuit. Sometimes the circuit works, but sometimes the whole circuit just stops working. Resetting the Arduino doesn't work and repowering would result in a dimly lit Arduino as if there were a short somewhere. But when i plug my arduino to the computer, most of the critical components work fine. Does anyone know what the problem is? Here's my current circuit:
The two big rectangles are buck converters, the pins on the most right are pins for power sources. The pins up top are for sensors. the pins on the bottom left are actuator pins. Im currently connecting the battery to the circuit board using female male connectors. I've tested it a few hours ago and it worked, but when i tested it now, the whole circuit board doesn't work. Not to mention the arduino's led is just dimly lit.