The system is drawing 5mA current and I want to keep it down as possible, but the sound I need it louder, as I use it outside.I tried with 74HC14 this:http://hackerspace-ffm.de/wiki/index.php?title=Datei:PWM_8Bit_MonoAmplifier_Steckplatine.pngwith a speaker but my Arduino is not responding when is connected to breadboard of 74HC14.
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via Egeo 16