[sdiy] An LDR predicament...

[Ken Stone]

well, for one thing, the wiper does not produce even remotely the entire
range... more like +4 -> -3V... what am i missing here?

The pot will not be using it's full rotation if it's attached to a pedal, so
that would explain this effect.

>also, the two led's seem to want to be either on or off... very little
effect is found in between.  do i need to bias them with some fraction of
the high or low rails?

Leds don't even start to light until there is at least 1.6 to 2 volts across
them, depending on the LED type. 
 
Ken
_______________________________________________________________________
Ken Stone   sasami at hotkey.net.au  
Modular Synth PCBs for sale <http://www.blaze.net.au/~sasami/synth/>
Australian Miniature Horses & Ponies <http://www.blaze.net.au/~sasami/>