I've received my Arduino this morning and I'm already having some amazing results. I'm a sound artist and my electronics knowledge is next to none, however I'm surprised how easy it is to implement some very powerful interactivity features into my work! Top stuff!
Anyway, I have a question...
I'm experimenting with a Light Dependent Resistor I bought from Maplin:http://www.maplin.co.uk/module.aspx?ModuleNo=35963&doy=17m7
Min. resistance @ 10lux: 9k[ch937]
Max. resistance @ 10lux: 22k[ch937]
Typ. resistance @ 100lux: 7k[ch937]
Dark resistance after 1 sec.: 0.05M[ch937]
Dark resistance after 5 sec.: 0.15M[ch937]
It works, however the readings I'm getting in Pure Data (using Pduino) are of incredibly low values! Something like 0.001-0.020 when lit with flashlight from about 1-0.5 cm distance. I bump it up digitally (multiply by 1000) to get higher numbers, but then I'm getting horrible step increments. Is there a way to increase sensitivity of this component? Or is this a software configuration issue?
I'm using a 1k resistor in the chain. Could this be an issue?
Did I get a wrong type of LDR?
I'm eager to learn.
Many thanks in advance!