Very simple to make but work fine
with an invert select out switch 
5 Likes
You know, the 555 is prolly the most versatile chip ive used.
3 Likes
yes me too, I started by putting some in all my circuit bend stuff to make LFO, then APC, timer in my sequencers … I don’t know how many things I did with these sacred 555, but in my modular synth it is the only one with this ADSR 
3 Likes