modified 10 years ago

False reading the Frequency

00:47:56

I have problem with my application, it's don't reading right frequency!!

published 10 years ago

hippodribble

10 years ago

Capacitor on the 555 is too small

blob

10 years ago

@hippodribble is right, the cap is toi small and increase about to 10k and 30k the two resistors to get a Good signal :)

SkeLe

10 years ago

It is the bandwidth of the ne555. You are getting a too high frequency

ahmed_mahmood

10 years ago

Dear @hippodribble & @blob on this situation, the reading must be high frequency not 10Hz !!!!

ahmed_mahmood

10 years ago

Even when I change value of the capacitor and resistors (same reading)

blob

10 years ago

I think EveryCircuit is not too strong to display such high frequencys, or, as @SkeLe said before, look at the 555 datasheet and see the maximum output frequency!

blob

10 years ago

I think EveryCircuit is not too strong to display such high frequencys, or, as @SkeLe said before, look at the 555 datasheet and see the maximum output frequency!

hurz

10 years ago

20fF, FYI a std DIL pin would already have around 3 or 5pF. Turn down the simspeed to 10ps/s and you see a nice but unrealistic high oscillation.

add comment in editor

EveryCircuit is an easy to use, highly interactive circuit simulator and schematic capture tool. Real-time circuit simulation, interactivity, and dynamic visualization make it a must have application for professionals and academia. EveryCircuit user community has collaboratively created the largest searchable library of circuit designs. EveryCircuit app runs online in popular browsers and on mobile phones and tablets, enabling you to capture design ideas and learn electronics on the go.