dear Velleman team
i love you new MM and VMA series of mini modules !
small, cheap, practical, wonderfull, thank you for it !
now, i would love to see in that series few more modules for audio
mainly ultra-small audio preamplifiers:
one specifically to preamplify ceramic piezo capsules, with the adecuate very high impedance input and a line level output
another specifically to preamplify small electret microphones with the adecuate power supplied to the electret
both of them should of course have some little trimmer or mini potenciometer for the gain control
i have read somewhere on the net that your VMA309 microphone/sound detector for the arduino doesn’t preamplify the analog signal of the microphone,
the LM393 comparator is used for the digital output only, is that correct ?