555 Timer IC and Light Detector Circuit using 555 IC
The 555 Integrated Circuit (IC) is an easy to use timer that has many applications. It is widely used in electronic circuits. it is a 8 pin ic..and also available as a dual timer ic which is 16 pin ic. pin configuration of 555 ic. Astable - free running mode: the 555 can operate as an oscillator. Uses include LED and lamp flashers, pulse generation, logic clocks, tone generation, security alarms, pulse position modulation, etc. Monostable mode: in this mode, the 555 functions as a "one-shot". Applications include timers, missing pulse detection, bouncefree switches, touch switches, frequency divider, capacitance measurement, pulse-width modulation (PWM) etc this ic has 3 operating mode. Bistable mode or Schmitt trigger: the 555 can operate as a flip-flop, if the DIS pin is not connected and no capacitor is used. Uses include bouncefree latched switches, etc. Astable mode An Astable Circuit has