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 particular 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.  Download this project in .doc
REFRENCES: - Electronic Devices and Circuits An Introduction - Allen Mottershead COMPONENT LIST: - Resistors R 1 47 KWR2 100 KW PotentiometerR3 56 WR4 – R9 8.2 KWR10 – R15 47 WAll resistors are carbon composition type of ¼ watt and tolerance of maximum 5%. Capacitors C 1 1000m¦, 16 V ElectrolyticC 2 1m¦, 16 V ElectrolyticC 3 0.01m¦ CeramicDiodes, Transistors and Triacs D 1, D 2 IN 4007D 3 – D 10 IN 4148D 11 – D16 LED, Red color, 5mmT 1 – T 6 BEL 187, NPN TransistorT 7 – T 12 BT 136, 4A/400VIC’s IC 1 7805, Voltage regulatorIC 2 555, Timer ICIC3 4017, Decade counterMiscellaneous Switch (S1) 1 Pole 6 wayTransformer (T) 230 V / 9 – 0 – 9, 500mAF 1, F 2 Fuse |
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