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Can the same 9V supply used to power Arduino, also be used on the output side of a relay? - Project Guidance - Arduino Forum
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I have an Arduino nano 5v can I use some of these resistors to power it with this 9v power supply or will I have to use a buck converter : r/arduino
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Dc-dc Usb Boost Power Supply Regulator Module 5v To 3.3v 9v 12v 24v Use For The Diy Arduino Nano Uno Free Shipping - Integrated Circuits - AliExpress
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