I designed a PCB 2 weeks ago, and it finally came today, but when I tried using it with my 9v battery that I'm using to power my project, it works for about 0.5 seconds then stops.
It involves an ultrasonic sensor, a servo motor, and an arduino nano.
The link above is a screenshot of the schematic, and the PCB design. Have i messed up somewhere or is a part i have at fault? If u want more info just reply with the question
i dont know why but i have the same problem. and when i connected to the 9v battery and connected to a bluetooth module the bluetooth module was not working a few days later when i checked the arduinos port was not working and i am sure its not because of the driver
as your using a 9v battery and a ultrasonic sensor the ultrasonic sensor is trying to pull more current than in the 5v. maybe check hoe much volt is there in the 5v using multimeter maybe its low as your'e using a 9v battery.... you may want to use 8 1.5v batteries instead so 12v is there
Not when you feed 12V (or 9V) to the pin that is expecting 5V.
Besides, you're simply wasting 7V at a few tens of milliamps in heat with a linear regulator