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


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

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

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

  4. >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.