Hi to everyone
I have a RFID acces control connected on a databse to retrieve the authorized users and log and It works fine, but just when It’s connected on a PC. I’d like to connect it using a PC feed. I made my own welding with the DC connector, and the Arduino works fine. After its setup, I put a RFID key into the RFID sensor and till here all OK. The Arduino goes to the database to compare the data, and then if the identificaction was succesully, it opens the door. OK, here it goes the second time, I put again the tag, and misteriously, Arduino has stopped working. At this moment, I have to restart it if I want that it works again. With the USB port works fine, and the PC supply, feed it with 12V by the DC connector.
Does anyone know what’s the problem with it?? Thanks a lot!