/diy/ - Do It Yourself

Anonymous Thu Oct 26 11:18:30 2017 No.1267071 [View]
File: 217 KB, 700x348, DFplayer_IO_mode.png [View same] [iqdb] [saucenao] [google]

>>1267053
I think the DFplayer has built-in pull-up resistors, so you need _not_ supply a HIGH signal, only LOW to activate the function you want. I guess it will not damage anything if you do though. A typical pull-down button is like an open collector or open drain output which means you only sink and never source current. Be aware that the duration of 'pushing the button' is evaluated. Short means 'next', long means 'volume up' or 'prev' and 'vol down', see pic.

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/diy/ - Do It Yourself

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