Hello there I am making RFID reader and I need 12 v to power up the reader I am using 12v wall adapter I need 12v to 5v dc converter . Currently I am using 7805 voltage regulator to give 5 v to Nodemcu and relay but I don't know is it efficient for a long use . I need my device to work for 24*7, I don't know 7805 is suitable for that could any one recommend what kind of converter should I use for this purpose.
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