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 ...

The implementation of a RGB LED fader using 555 timer and 4029 digital IC is the objective of this project. During the operation, the RGB LED is continuously cycled through the colors of the rainbow ...