I'm building up yet another Uglyface with the LFO Mod (http://www.avwz35.dsl.pipex.com/uglyface%20lfo%20&%20mods.jpg) and I was planning on adding a rate LED. Is it just as simple as putting the LED off of R6?
Roger
Pin 7 of the opamp will give you a on/off LED. Pin 1 of the opamp will give you a 'fading' on/off LED.