This is a nice and small ASR module. Normally you would call this a ADSR module but Kassutronics left out the decay part and knob. He uses the ADSR in a way where the decay and release are often set the same. Therefor Kassutronics combined these two under one knob. The ASR can also loop and can be used as a sort of LFO. It’s a nifty little module. Again with the white panel made from wood. I have had to fix it once where the gate wouldn’t work anymore and the loop function did. I was a minor fix the bottom TL072 broke so have to keep a eye on that one.
https://kassu2000.blogspot.com/2018/10/asr-envelope.html
Difficulty to build: Easy / Medium