Hi all,

Is there an IC that can multiply the frequency of a DC square wave by 60Hz?? (i.e. if the input is 1Hz the output will be 60Hz, and if the input is 10Hz the output will be 600Hz)

Thanks is advance.

 

Hello,

You can do this using a PLL chip with a divide by 60 counter.
An 4046 chip is a PLL.

Bertus

 

This can be accomplished with a phase-locked loop circuit.

 

Thanks for the help. Another question, is there a way to disable/pause the 7447 outputs??

 

Thanks for the help. Another question, is there a way to disable/pause the 7447 outputs??

If the out (pin 4) is shorted to ground will turn off the display. Since the outputs are normally low to turn on the segments, the outputs will go high when pin 4 is grounded.

 

Hi, but I don't want to turn off the seven segment display. I just want to freeze it. for instance lets assume I have a counter and the segment display is not in freeze, the counter will keep showing. When the 7447 is put to freeze, the counter will continue but the display will remain where it way.

 

Or else, is there a way to freeze the 7490 counter ?? without disabling or effecting the inputs.

 

What you need is a latch. A simple solution is to replace the 7447 with a 7-segment latch/decoder/driver such as 4511 or 14543.

With the 4511 you will have to change your LED display to common cathode.
The 14543 can be used with either common anode or common cathode display.

 

Thanks for the help MrChips.