Hi There
I am in the process o building a TriStar L1011 flight simulator. I need to drive a Haydon aircraft clock with a 60 HZ 2 phase oscillator shifted by 90 degrees. The electronics circuits within the clock requires 2 square waves inputs shifted by 90 degrees. I have acheived the first part by using 2 by 4013B cmos circuits which by selecting the correct outputs gives me two outputs of 60 Hz shifted by 90 degrees with a input frequency of 480 Hz (480/4 ). I need help on getting a accurate crystal oscillator that gives a 480 Hz output after division using a readily available crystal frequency. I have been able to get the clocks working using a Ne555 astable with a output of 480 Hz but accuracy leaves alot to be desired.
Regard Terry
I am in the process o building a TriStar L1011 flight simulator. I need to drive a Haydon aircraft clock with a 60 HZ 2 phase oscillator shifted by 90 degrees. The electronics circuits within the clock requires 2 square waves inputs shifted by 90 degrees. I have acheived the first part by using 2 by 4013B cmos circuits which by selecting the correct outputs gives me two outputs of 60 Hz shifted by 90 degrees with a input frequency of 480 Hz (480/4 ). I need help on getting a accurate crystal oscillator that gives a 480 Hz output after division using a readily available crystal frequency. I have been able to get the clocks working using a Ne555 astable with a output of 480 Hz but accuracy leaves alot to be desired.
Regard Terry
