For the analog version of Vocode-O-Matic I needed 2 input amplifiers for a specific signal source. Because I’m planning on several different signal sources as input whose signal levels may be quite different I wanted the amplifier to have a variable gain. To then get an idea of what the output voltage will be, I thought some peak detection mechanism would maybe be handy. So I decided to reuse the peak detector from the envelope follower I wrote about earlier.
For quite some time I’ve been looking for a nice way to reuse some level meters I salvaged from old cassette recoders.
So this could lead to a nice match, I thought. Meet Level-Up-O-Matic:
This may not be the best of pics but I wanted the light to shine through the meters.
Some experimentation will show how well this works out.
