Hi guys,
I'm using a PC O-scope to measure the output of a 555 timer in astable mode. The 555 I'm using is the NE555P.
Basically the discrepancy I'm having is calculated vs. measured. I know it's not going to be perfect but it seems what I'm observing may be a bit off.
components:
R1 = 2153 ohms
R2 = 4658 ohms
C1 = 1 uF
C2 = .01 uF
Vcc = 5V
So I'm calculating a frequency of ~125 Hz, P = 8 ms
What I'm observing is f = 96 Hz, P = 10.4 ms
I'm not sure what I'm doing wrong or if this is normal and I'm just being picky. I measured the resistors and capacitors to make sure they're correct. I tried the output with load and no load and there was a difference in period of about .6 ms (according to my O-scope).
I attached my circuit and O-scope display
thanks,
Dave
I'm using a PC O-scope to measure the output of a 555 timer in astable mode. The 555 I'm using is the NE555P.
Basically the discrepancy I'm having is calculated vs. measured. I know it's not going to be perfect but it seems what I'm observing may be a bit off.
components:
R1 = 2153 ohms
R2 = 4658 ohms
C1 = 1 uF
C2 = .01 uF
Vcc = 5V
So I'm calculating a frequency of ~125 Hz, P = 8 ms
What I'm observing is f = 96 Hz, P = 10.4 ms
I'm not sure what I'm doing wrong or if this is normal and I'm just being picky. I measured the resistors and capacitors to make sure they're correct. I tried the output with load and no load and there was a difference in period of about .6 ms (according to my O-scope).
I attached my circuit and O-scope display
thanks,
Dave
Last edited: