[sdiy] Simple clip detect LED circuit

[Paul Perry]

Ah, I was thinking symmetric audio signals.
But, you don't need much in the way of extras..
just an absolute value circuit in front.  of the 555.

paul perry melbourne australia
----- Original Message ----- 
From: "Seb Francis" 
> A nice 1 chip solution would be perfect :)
> But looking at the 7555 datasheet I can't see how I would avoid having 
> to stick a full wave rectifier in front which then requires additional 
> opamps.  I initially thought the THRESHOLD input could be used to detect 
> positive peaks and the !TRIGGER input to detect negative peaks, but they 
> each give different output states.