Infra-Red Level Detector
R1_____________10K 1/4W Resistor R2,R5,R6,R9_____1K 1/4W Resistors R3_____________33R 1/4W Resistor R4,R8___________1M 1/4W Resistors R7_____________10K Trimmer Cermet R10____________22K 1/4W Resistor C1,C4___________1µF 63V Electrolytic or Polyester Capacitors C2_____________47pF 63V Ceramic Capacitor C3,C5,C6______100µF 25V Electrolytic Capacitors D1_____________Infra-red LED D2__________..