Question

Problem 4: The Pulse Width Modulator module The signal that is shown below has a 50 % duty Cycle Provide a sketch of the same signal with a 25 percent duty cycle. b) a) Code of a PWM signal driving the BLUE LED is provided in the file PWM_Test.doc Please study and determine a button press (SW1) changes the LED light intensity and provide a sketch of the signal that drives the LED i.e. what is the new signal's pulse width after a button press. c) List at least 3 applications that can employ the PWM module for the operation

Answer 1

enoltof with 50 duty cycle s as Gtven Pwn signak Time Pesiod (a) Pun sgnalaith 507. dutyycle duby le PoM Sgnal with 25). Tf 50 1. dutay Cycle sven to drive in one clocK Cycle BLUE LED then h LE D 'Q haif of fhe tirme the maintng hotf ime LED in "ON State and another gem in oFF State. changed that duty gcle Clock Periol the time iS in Suppose p we h 25 . then LED in ON Stafc and Ren ha ofF Stat e only emaini Imsec the Pulsc time Pesiod i5 duty ycle fhe LED On' for o5 m sec With 501 with 25duy y cle He LED oN' foY o.25 mscc ( CS Scanned with CamScanner itiddist ttaaddid .

(C) APPlications of Pun Peor Signals eher device "TTe ain aPP Cations -- mainy used to Contool Sone are are OPoM s used for contsolg DC motors PwM sused foi conto ng aralo toth mico Pocessod's digital imput 3 Pn Technoloy is used tn tnveaters to ive Steady output volt age of 230V b llo V AC etie bbad Cincuits "Plcase Give Me likes Cs Scanned with CamScanner ililtditdilitidutti