心型闪烁灯电路heFlashingHeart

心型闪烁灯电路 he Flashing Heart
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  Operation
  Once power has been applied to the circuit, the Red LEDs should all be flashing on and off together. The Yellow LEDs should be flashing on and off, but only every other Yellow LED should be on at one time. The Green LEDs will stay on at all times. The flash rate can be adjusted by turning R9. Connections for a fixed value resistor for R9 are provided on the board layout if preferred.To dress up the project, a favorite photograph can be placed in the heart, and a frame can be made to fit the circuit board.
  Parts List
   
  Resistors
  R1, R2 - 470 ohm, 1/2-watt
  R3-R5 - 100 ohm, 3-watt
  R6-R8 - 1000 ohm, 1.4-watt
  R9 - 5000 ohm potentiometer
   
  Capacitors
  C1, C2 - 100uF, 16 volts, electrolytic radial
   
  Semiconductors
  IC1 - 4047, low power monostable/astable multivibrator
  Q1-Q3 - 2n3643 NPN transistor or equivalent
   
  Diodes
  LED1-LED84 - yellow light-emitting diode
  LED85-LED126 - red light-emitting diode
  LED127-LED142 - green light-emitting diode
   
  Other components
  PS1 - 12VDC @ 500mA wall transformer
   
  Miscellaneous: Jumper wire, solder, printed circuit board,
  drill and bits,14 pin I.C. socket, and a frame or case.