Led Flasher Circuit Using 555 IC

LED flasher circuit can be built based on 555 IC. Using 555 IC, the flashing rate can be more flexible to adjust.  This LED flasher circuit is similar to our transistor flasher circuit, but the flashing period of both LEDs won’t be same.

led flasher 555 circuit schematic diagram

The flashing frequency is determined by C1, R1, and R2. You can try values around 100k for R1 and R2 to give around 1.4 s flashing period. Variable flashing rate can be implemented by replacing the R1 with 1Mega ohm potentiometer in series with 22k resistor. Lower power consumption can be achieved  if we  remove LED 2 and R4 and use only LED 1. When the R2 value is much lower than R1, then the LED 1 wil flash only for fast period, gives a strobe efffect. I recommend 9V for this flasher circuit since higher voltage will cause exessive heat on 555 IC.

This entry was posted in Lighting and LED Circuit and tagged . Bookmark the permalink.,
Possibly Related to "Led Flasher Circuit Using 555 IC" Circuits

  • Power FET Lamp Flasher
    As an alternative to bipolar transistor, a lamp flasher can be built by using two power FETs.  Like other flasher circuit, this circuit alternately switch the two lamps off and on.  It is based on a simple astable multivibrator that … Continue reading →...
  • LED Flasher Using Transistor
    This simple LED flasher circuit will turn ON and OFF two LED alternatively. The first LED will turn ON when the second LED is OFF for some period, then the first led will turn OFF and the second LED will … Continue reading →...
  • 555 IC LED Flasher for Up To 10 LEDs
    This LED flasher circuit uses 555 IC, and is capable of driving up to 10 LEDs. The good news is, the use of multiple LEDs in series doesn’t increase the power consumption when compared with using only two LEDs. If … Continue reading →...
  • Supply Voltage Monitor with 555 IC
    This is a supply voltage monitor circuit, an indicator to show if the power supply is in good condition. Designed using the IC 555 timer, this circuit will flash the LED1 when the supply voltage surpass preset level.  With flashing … Continue reading →...
  • 1.5V LED FLasher Using 3 Transistors
    To make LED works, you need a voltage source that is higher than the LED’s forward bias voltage, and it’s higher that 1.5V (around 2V for red LEDs). Fortunately, now you can make a LED flasher circuit that needs only … Continue reading →...

Comments are closed.