craigw52’s posterous

1. Momentarily bring pin 2 of the 555 low by touching it to ground. What does the output do?
        Nothing...te LED stays lit
2. After the LED goes off, do this again and time the LED to see how long it remains on.
        5 seconds
3. Use this formula to calculate how long the LED should stay on: t=R1 x C1
        4.7 seconds
     Does this agree with the time the LED was actually on?
        Yes
4. Cause the LED to light and touch pin 4 to the ground before the LED would normally turn off. What happened?
        The LED turned off
5. Change the value of C1 to 0.1 µF. What do you think will be the result of this change?
        The LED will only stay on for 1 second
6. Repeat all the above steps to determine the actual effect of making capacitance change. What happened?
         I was correct...the LED stayed on for 1 second instead of 4.7 seconds
7. You may also wish to change the value of R1 to see its effect. What happened?
         No, I do not have time to do that right now