The 555 timer


1. The simplified internal arrangement of a 555 timer is shown in the diagram below. The function of the pin marked X is:






2. What time period is is generated by the circuit shown below?






3. In the circuit shown, the trigger input must be:






4. In the circuit shown below, the low time of the waveform generated by the timer will depend on:






5. In order to produce a square wave with a near 50% duty cycle from the circuit shown in the previous question, the component values should be chosen so as to satisfy the relationship:






6. Which one of the following gives the period of the waveform shown in the diagram below:






7. Which one of the following gives the duty cycle of the waveform shown?






8. What packge is used for this 555 timer?






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