i have a problem with my arduinoboard. i connected five photosensors at the analogin-ports. if i cover one of them (sensor1), its value decreases from about 900 (i read them over the serialport) to 0. if i cover another sensor (sensor2) then, its value decreases to 300-400. sensor1 shows about 6-7 then.
for my project i have to be shure, that their value is always (nearly) the same (uncovered/covered). whats wrong with my circuit?
thanks in advance, hans