What is the min frequency that generated by RC circuit for IC4541

[srevish]

Dear All.

I am using the IC4541 to timing delay, I have R = 1010000 ohms & C = 1.5 uF , so that I get the frequency of 0.29 HZ.

By selecting the Pins in the timer IC4541 (2^16) , I set my delay as 32 hours. 32768/(1/(2.3*R*C) = 32 hours.

Please any one tell if this Capacitor hold this frequency of 0.28 HZ and can this circuit works.

 

[GUMY]

Which type of capacitor? You need the capacitor with low leakage current, in range of nA. In general I don't see any problem.

 

[srevish]

Which type of capacitor? You need the capacitor with low leakage current, in range of nA. In general I don't see any problem.

Dear Sir,

Thanks for your reply, I am using the Box capacitor.

 

[kenambo]

hi
I think it can hold that much of frequency.... not a problem.. But why do u need such low frequency?

 

[srevish]

hi
I think it can hold that much of frequency.... not a problem.. But why do u need such low frequency?

Hi,

I am developing the circuit to control the valves based on the timing, with this low frequency I make the IC4541 to count 32 hrs, so I create that delay.

By doing like this I can ON the Valve once in every 32 hrs.

By using this frequency will this be possible ?

 

[GUMY]

You have to be aware, that timing of circuit can not be very accurate, taking into consideration tolerances of capacitor, resistor and IC...

 

[srevish]

You have to be aware, that timing of circuit can not be very accurate, taking into consideration tolerances of capacitor, resistor and IC...

Yes, I am aware of the tolerance, I have considered as 10 % tolerance.