6通道自动逆向行驶灯顺序迪斯科6ChannelAutoReverseSequentialDi

6通道自动逆向行驶灯顺序迪斯科 6 Channel Auto Reverse Sequential Disco Running Lights
  
  From 230 V AC a DC supply of+ 5 V is obtained. The power supply is given to the other blocks. The pulse generator at a partular frequency generates the clock pulses. The clock pulses are counted by a counter and gives output after every 10 pulses. The counter drives the transistors, which form the triac firing circuit. The transistors fire the triacs and they provide sufficient current to the load. Decorative bulbs are connected as load for each triac. The bulbs are sequentially turned height=524 src="/data/attachment/portal/201007/ET28063201007211058272.gif" width=860 border=0>
  The IC 555 works as the pulse generator and feeds the clock pulses to IC 4017. IC 4017 is the heart of this circuit. It works as a counter and gives the output after every 10 pulses. It drives the transistors, which in turn fire the triacs. The triac provides sufficient current to the load.
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  REFRENCES: -
  Electronic Devices and Circuits An Introduction-Allen Mottershead
  COMPONENT LIST: -
  Resistors
  R 147 KW
  R2100 KW Potentiometer
  R356 W
  R4 ? R98.2 KW
  R10 ? R1547 W
  All resistors are carbon composition type of ¼ watt and tolerance of maximum 5%.
  Capacitors
  C 11000m¦, 16 V Electrolytic
  C 21m¦, 16 V Electrolytic
  C 30.01m¦ Ceramic
  Diodes, Transistors and Triacs
  D 1, D 2IN 4007
  D 3 ? D 10IN 4148
  D 11 ? D16LED, Red color, 5mm
  T 1 ? T 6BEL 187, NPN Transistor
  T 7 ? T 12BT 136, 4A/400V
  IC?s
  IC 17805, Voltage regulator
  IC 2555, Timer IC
  IC34017, Decade counter
  Miscellaneous
  Switch(S1)1 Pole 6 way
  Transformer(T)230 V / 9 ? 0 ? 9, 500mA
  F 1, F 2Fuse