Motor Bike and Car Turning Signal Indicator with 555 Timer IC

Here is electronic circuit project for Motor Bike and Car Turning Signal Indicator. In our daily life we see vehicles turning indicators when they turn left or right. It looks like Simple LED Blinking. But it's not only simple blinking LEDs inside indicators of vehicles. Here we are building a fancy Car/Bike Turning Indicator Circuit using 555 Timer IC, with four LEDs glowing one by one in a particular pattern and we can control the speed or frequency of this LED indicator by simply turning a Potentiometer.

Motor Bike and Car Turning Signal Indicator Circuit Diagram:


Parts List:

  • BC547 or MPS A42 NPN transistor -4
  • Bread Board -1
  • 555 Timer IC -1
  • 1K -1
  • 10k POT -1
  • 10K -6
  • 68K -1
  • Power Supply
  • LED -4
  • 10uF Capacitor -1
  • 470uF -1
  • 1N4148 Diode -2
  • 9V Battery -1
  • Jumper wire
In this Bike Turning Signal Indicator circuit, we have used one 10K and 1K resistors and a capacitor for generating a delay. The 1n4148 diode is connected in reverse bias at the output pin of 555 timer IC to maintain a constant current. Due to base current BC547/MPS42A (NPN) Transistor drive, the LED’s ON and OFF. LEDs are connected to the transistor through a 220ohm resistor with respect to Vcc. This 220ohm resistor will save LED to may get damaged.

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