sim900a

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  1. OmarTPX

    Dumb Mistake with SIM900A Power – Using Diode Drop from 5V to Fix It, Will It Work?

    Hey guys, I'm working on a GSM project using the SIM900A module, and yeah I <Mod: Obsecenity deleted> I totally forgot that SIM900A needs max 4.5V on the VBAT pin. So I went ahead and designed my whole circuit thinking everything is 5V powered, including SIM900A. Luckily, I had already added a...
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