SEQUENTIAL TIMER USING 555 OBJECTIVES : The objective of this experiment Is to cascade, or connect in series, a pair of 555 timers sequentially light a pair of LEDs. 555 Timer : TIME ON YOUR HANDS: With the monolithic integrated circuit 555 you can get accurate timing ranges of microseconds to hours, independent of supply voltage variations. This versatile device has a large number of interesting practical applications, especially for electronic hobbyists. 1. +5V / 500mA 2. 230V mains operated Qty :