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    How to activate 12V/2A electromagnet with 5V (USB power) each 60 minutes?

    Hi all, I feel like I am stuck because don't know how to solve following "simple" solution: Somehow I have to (each 60 min) activate 12V/2A electromagnet, with 5V input voltage (tipical PC USB (5V/100mA). 5V is powering microcontroller, and with that microcontroller, each 60 min I have to...

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