Opto Compressor

Here's an opto compressor I finished enough today to start testing. What I don't like about opto compressors like the LA-2A is that you're limited by the LDR time constants, so I decided to build an opto compressor with adjustable attack and release. I used an optocoupler with a 1.2 ms rise time and 2.1 ms decay time and I designed the sidechain to determine the attack and release times. Schematic ghr.fi/opto/opto.pdf Datasheet of the optocoupler I used... Read more