红外线水位计电路

下面是 [红外线水位计电路]的电路图
  　　
  
  材料BOM表：
  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 Infra-red Photo Diode (see Notes)
  D3,D4 1N4148 75V 150mA Diode
  D5 LED (Any color and size)
  D6,D7 1N4002 100V 1A Diodes
  Q1 BC327 45V 800mA PNP Transistor
  IC1 555 Timer IC
  IC2 LM358 Low Power Dual Op-amp
  IC3 7812 12V 1A Positive voltage regulator IC
  RL1 Relay with SPDT 2A @ 220V switch
  Coil Voltage 12V. Coil resistance 200-300 Ohm
  J1 Two ways output socket(责任编辑：电路图)