I´ve got the following problem in simulating an astable 555 circuit:
The frequency of the output signal varies.
It starts normal with a longer time for the first charging of
the 10µF capacitor. The next period seems to be normal but
then the time of the periods increases steadily until it suddenly
goes back to start again...
It should work at 1 Hz.
The pause time I need is 1/10 sec.
So the R1 has to be 14,43 kOhms and R2 has to be
115,42 kOhms.
Vcc = 9V and I put a capacitor between pin 5 and ground.
I tried other times and values even with different programms (multisim2001, circuit maker) but the output signal was always
weird.
Has anyone experienced the same problems or has an answer?
Thank you for your help!
Joe
The frequency of the output signal varies.
It starts normal with a longer time for the first charging of
the 10µF capacitor. The next period seems to be normal but
then the time of the periods increases steadily until it suddenly
goes back to start again...
It should work at 1 Hz.
The pause time I need is 1/10 sec.
So the R1 has to be 14,43 kOhms and R2 has to be
115,42 kOhms.
Vcc = 9V and I put a capacitor between pin 5 and ground.
I tried other times and values even with different programms (multisim2001, circuit maker) but the output signal was always
weird.
Has anyone experienced the same problems or has an answer?
Thank you for your help!
Joe