led blink circuit thank you 1 LED Blink Circuit R4 F LED1 IC

led blink circuit, thank you

1. LED \"Blink\" Circuit R4 F LED1 IC1 R2 TRE icc. RES R1 DIs OUT f LED blinking

Solution

the clock frquencygen rated by timer=1/(T_charge+T_discharge)

T_charge=0.69(R2+R3)C1=0.69*(16+27)*10*10^3*10^-6=0.2967

T_discharge=0.69*R3C1=0.69*27*10*10^3*10^-6=0.1863

Timer freq=1/(0.297+0.1863)=2.069HZ

Duty cycle=0.2967/(0.297+0.1863)=0.61 or 61%

The Dflipflop circkit will divide this timer frequency by 2 so the freqncy apply to the LED=2.069/2=1Hz

so the LED blink sircuit have 1HZ freq and 61% Duty cycle