Midi controlled Dub siren

Midi controlled Dub siren (basic proof of concept)

ac coupling of a 0-5 V signal from Atmega328

Example of a signal with dc offset, and after the passive filter

Having  a 0 to 5 V signal generated digitally with a R2R 8 bit dac, i needed to remove the offset introduced . This is a simple way and also makes it to "audio friendly" .

Low pass filter and ac coupling circuit block used in one of my projects