Chapter 4 EC Sesi I 2024/2025

What is the main function of the 555 timer IC?

• To generate pulses and time delays

• To measure temperature

• To generate sound

• To store data

Which pin is used for the trigger input?

• Pin 3

• Pin 2

• Pin 4

• Pin 1

What does the OUT pin provide?

• Reset function

• Control voltage

• Output signal

• Ground connection

In which mode does the 555 timer produce a continuous square wave?

• Monostable mode

• Schmitt trigger mode

• Bistable mode

• Astable mode

What is the purpose of the RESET pin?

• To provide power supply

• To stop the output pulse

• To start the timing cycle

• To adjust timing characteristics

Which component is used to adjust timing in the 555 timer?

• Diode

• Transistor

• Inductor

• Resistor and capacitor

What happens when the voltage at the THRS pin exceeds two-thirds of the supply voltage?

• The timer resets

• The output goes low

• The capacitor discharges

• The timing cycle ends

What is the main use of the 555 timer in monostable mode?

• To measure frequency

• To store data

• To generate a single pulse

• To create a continuous signal

Which mode allows the 555 timer to act like a toggle switch?

• Astable mode

• Schmitt trigger mode

• Monostable mode

• Bistable mode

What is the function of the Schmitt trigger?

• To store energy

• To generate a square wave

• To filter noise

• To measure voltage