- #1
zahly
- 4
- 0
I conducted an experiment involving a 555IC timer circuit and the hypothesis investigated the frequency and period of the LED connected.
Using the formula for frequency; 1.44/(Ra + 2Rb)C
where R1= 1000R
R2= 10000R
C = 10uF
the frequency equals 6.857 (rounded value)
now using data studio (a reliable computer program which can graph the frequency) the frequency equals 1.429 (rounded value)
Now, I've taken into consideration the 5% tolerance of the resistors used, and the variation on the capacitor as these may account for the changed frequency but this still doesn't explain this rather large difference in expected frequency and observed frequency...
Any explanations for this large difference?
Using the formula for frequency; 1.44/(Ra + 2Rb)C
where R1= 1000R
R2= 10000R
C = 10uF
the frequency equals 6.857 (rounded value)
now using data studio (a reliable computer program which can graph the frequency) the frequency equals 1.429 (rounded value)
Now, I've taken into consideration the 5% tolerance of the resistors used, and the variation on the capacitor as these may account for the changed frequency but this still doesn't explain this rather large difference in expected frequency and observed frequency...
Any explanations for this large difference?