4 Roulette Circuit

This project is a simple roulette circuit made from 555 IC and 4017 decade counter. The circuit can be used for decorations and games. When the touch plate is touched, the LED will start to light up one after the other and when finger or hand is remove, the led will stop after few seconds.

Part List:
R1 - 5.6 Mega ohms 1/4W
R2 - 2.2 Mega ohms 1/4W
R3 - 10 kilo ohms 1/4W
R4 - 1.2 kilo ohms 1/4W
R5 - 560 ohms 1/4W
C1 - 2.2uF electrolytic capacitor rated 10V
C2 - 1uF electrolytic capacitor rated 10V
C3 - 100nF
LED (1-10) - red led ( see LED pinout in case you forgot)
Q1 - 9012, BC557, or similar PNP transistor
555 - LM555 or similar timer IC
4017 - 4017b decade counter
BAT - 9v battery
Touch - any conducting plates

Similar circuit:
LED chaser using 4017

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4 comments:

  1. transmission lines designJanuary 25, 2012 at 7:44 AM

    great post.
    transmission lines

    ReplyDelete
  2. AnonymousMay 1, 2013 at 10:14 AM

    hey can you help me with the breadboard configuration?

    ReplyDelete
  3. AnonymousJune 5, 2013 at 12:30 AM

    is there a breadboard configuration image for this circuit? I constructed it the same as the schematic above shows and it doesn't work. I used the exact same components also.

    ReplyDelete
  4. AnonymousJune 11, 2013 at 2:09 PM

    Is there any way to disable the part that the LEDs light up one after the other? Actually I need a circuit that randomly select a Led to light up after every single press of the switch. Is there any circuit like this?

    ReplyDelete

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