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oh! it's easy circuit you can search in google by keyword "ic 555" you will get the schematic of the 555 timer and the equation that you can get the values of resistors and capacitors or you can search about the toturial and simple program that calculate the valuse of R's and C's .
and another way but it's not efficient that buy crystal
thank's for all.
i think, i need any clock generator for my counter circuit which the IC i used are 6 HCC40110B from ST electronic with six 7 segment, so that the result are x.xx.xxx,the last three digits equal 1/1000 second. how to find clock generator for this circuit.....?
once again i said thank's a lot for you any kind......
Does x.xx.xxx mean 9 minutes 59 seconds 999 milliseconds? If that's true, then you probably need a 1 kHz clock, and you probably want it to be more accurate and stable than a 555 circuit.
You could buy a crystal oscillator that is a convenient multiple of 1 kHz, and then divide it down to 1 kHz. For example, buy a 2.048 MHz oscillator and an 11-bit binary divider. Or maybe a 1.000 MHz oscillator and a three-stage decade divider.
it's true 9.59.999, do you mind to give pulse generator circuit, i tried a simple 555 circuit but this circuit not running well. in this topic have circuit using 4060 & 4017, is it match with my circuit..?
please everybody help me, i had build counter up/down using IC HCC40110B, and the circuit is running well, but if i push the stop button, the counter digit on 7-segment not stop fully, so that please help me to find this problem....