4 LED Light Sequencer using 555

Another 555 IC project that will flash LEDs in such a way that light turns on in a sequence. You can use this as an indicator for turning left or right for vehicles and bikes.
light sequencer circuit
light sequence (LED1 to LED5)
Part List:
R1, R2 - 4.7 kilo ohms 1/4W
R3 - 3.9 kilo ohms 1/4W
R4, R10, R11, R12, R13 - 10 kilo ohms 1/4W
R5 -220 ohms 1/4W
R6 - 390 ohms 1/4W
R7, R8 - 500 ohms 1/4W
R9 - 560 ohms 1/4W
Q1, Q2, Q3, Q4, Q5 - 2N2222, 9013, or similar NPN transistor
LED1 to LED5 - red or any LED (see LED pinout in case you forget the pins)
C1, C3 - 220uF electrolytic capacitor rated 16V
C2 - 100nF
D1, D2 - 1N4001 or any similar diode
555 - LM555 or similar timer IC
DC -12V battery

Part List pinout:
2N2222, 9013 pinout
555 IC pinout
Similar Circuits:
LED flasher by 555 - various flasher schematic using 555 IC
LED light chaser - similar to this circuit but 10 LEDs turn on one after the other

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4 comments:

  1. AnonymousJune 3, 2013 at 8:01 PM

    Can someone post a brief explanation of how this circuit works?

    ReplyDelete
  2. UnknownAugust 27, 2014 at 12:26 PM

    how to use four 1w leds with this circuit and can the speed of sequence be controlled what changes to be done please help

    ReplyDelete
  3. UnknownOctober 24, 2015 at 8:34 AM

    Hello. It's posible to obtein 20 sequenzer using CI 4017?

    ReplyDelete
  4. AnonymousNovember 6, 2015 at 10:52 AM

    >Hi
    I have made a simulation in Proteus 8 and Multisimulator 12 and get the same fault.
    Why can I not let it work as a test before make a pcb bord for it.
    Something is wrong in the schematics.

    ReplyDelete

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