40 LED Bicycle Light Using 555


Posted on Feb 4, 2014

The 555 circuit below is a flashing bicycle light powered with four C,D or AA cells (6 volts). Two sets of 20 LEDs will alternately flash at approximately 4.7 cycles per second using RC values shown (4.7K for R1, 150K for R2 and a 1uF capacitor). Time intervals for the two lamps are about 107 milliseconds (T1, upper LEDs) and 104 milliseconds (T2 lower LEDs). Two transistors are used to provide additional current beyond the 200 mA limit of the 555 timer. A single LED is placed in series with the.


40 LED Bicycle Light Using 555
Click here to download the full size of the above Circuit.




Leave Comment

characters left:

Related Circuits

  • New Circuits

    .

     


    Popular Circuits

    100Khz-multiple-output-switching-power-supply
    Used for the surface acoustic wave of gas detection shaking circuit design
    Computer Microphone Circuit
    Optical Heart Rate Monitor
    The Xonar Essence STX
    Emergency Egg Locator Beacon (EELB)
    Shared antenna amplifier power since the controller circuit diagram
    Five-way operation of the dynamic braking circuit



    Top