Hello people, Im working In a project using an Arduino Mini Pro and I built a 5.1V source using zener diodes, shown Below. I am also using a RFID module RC522 wich needs 3.3V, I read on internet that i just add a resistor and then a zener diode that works with 3.3V. The whole circuit is shown below…

Voltage source using zener diodes

septillion September 26, 2016, 3:18pm 5

Simply because mains voltage can kill you

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