how to wire photo/light sensitive resistors?

[cedric]

topics says most of it.

but how does it react to light?
ie.: DARK = low Ohm count, LIGHT = high Ohm count ?

and can they be used in a theremin-ish way to control the DEPTH in a phaser etc..?

thanks in advance.

- ced

[The Tone God]

Dark = higher resistance, Light = lower resistance.

You could use it to control just about any resistive control element but it depends on how that element (i.e. pot) is wired meaning is the circuit using two or three of the pot legs.

Check out the "Rock N' Control" article for some background.

The Tone God's Domain

Andrew

[troubledtom]

topics says most of it.

but how does it react to light?
ie.: DARK = low Ohm count, LIGHT = high Ohm count ?

and can they be used in a theremin-ish way to control the DEPTH in a phaser etc..?

thanks in advance.

- ced

yes,
   it can be used in a theremin ish way.
my alphawave can be used as a one and all instrument[sp?] or can be used to plug anything into it and interract w/ it w/ different levels of distortion and modulation. i suck at typeing and spelling sorry.
     - tom

[cedric]

nah. your spelling is alright
didn't know the alphawave was set up like that though w/ the hoove control and all.
nice.

a bit off topic - has anyone tried to do the 'NOISE 567' on Hemmo's site?
sounds to be a crazy thing

and can i simply add an LDR between ie. lug 2 and 3 on the SHIFT (pitch) knob on my ring mod (it works/changes the pitch when i add a resistor in there).

- ced

[troubledtom]

wire it up just like a resistor. after you do i you'll slap yourself because it's easy  :lol:
      rock on,
              - tom

[cedric]

*slapping mysl3ef silly for asking..*

[petemoore]

You can always try to get readings of resistance from photocell in light and dark conditions...Good thing too..you may find alot of inconsistancies from one cell to the next...the meter display jumps around alot but you should be able to get a ballpark number of high and low resistances from it.

[Narcosynthesis]

for a light dependant resister (LDR) i use the formula LURD aka, light up, resistance down

same works for temperature dependant resisters (forgotten the proper name - thermisters?) TURD aka temperatue up, resistance down, this is the one i remember (its just temp/light switched)

David

[cedric]

wow.. would be pretty kinky to use some of those thermisters in a pedal..

- ced