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+https://www.nxp.com/files-static/training_pdf/FTF/2012/americas/WBNR_FTF12_AUT_F0098.pdf has many cool pictures explaining the whole thing.
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+https://www.nxp.com/docs/en/application-note/AN4849.pdf is literaly a complete example of a four cylinder internal combustion engine (ICE) injector drive.
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