555 Timer IC Quiz

What is the primary function of a 555 Timer IC?

• Memory storage

• Generating PWM signals

• Timer, delay, pulse generation

• Voltage regulation

How many pins does a standard 555 Timer IC have?

• 6

• 8

• 10

• 12

Which mode of the 555 Timer is used to generate a continuous square wave?

• Monostable

• Bistable

• Astable

• Tri-stable

What is the function of Pin 2 (Trigger) on the 555 Timer?

• Sets the output low

• Triggers the timer when voltage drops below 1/3 Vcc

• Supplies power

• Resets the output

In astable mode, the output frequency depends on which components?

• Inductors only

• Capacitors and resistors

• Diodes and transistors

• Only the power supply

In a monostable circuit, the pulse width depends on:

• Input frequency

• Diode forward voltage

• Resistor and capacitor values

• Output voltage

What is the typical operating voltage range of the 555 Timer?

• 1V - 5V

• 3V - 15V

• 10V - 30V

• 5V - 12V

In a bistable mode, the 555 timer behaves like:

• Oscillator

• Single-shot timer

• Flip-flop

• Voltage regulator

What should you do if you don't want to use the RESET pin (Pin 4)?

• Leave it open

• Connect it to ground

• Connect it to Vcc

• Connect it to the output

In an astable 555 timer configuration, to reduce duty cycle, you can:

• Increase capacitor size

• Add a diode across one resistor

• Remove a resistor

• Lower the supply voltage