Envelope Follower / LED Driver

I’m about to use the Envelope Follower from this schematic, but i cant get it working.
I’m not sure if the schematic is rigth. My 4,5V always turn into 9V as soon as i put in the IC.

I spend the hole day searching for mistakes, but i can’t find any.

You mean the voltage to earth at the junction of R12’ and R13’ changes from 4.5V to 9 V after inserting the IC?

1 Like