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LCD frequency Display

 
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LCD frequency Display
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fasti
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Joined: 13 Oct 2006
Posts: 3

Post LCD frequency Display Reply with quote
Hi Everybody,

I want to make a Frequency Display for my Analog Fm Transmitter.
Would a couple of 4060 ICs do the trick?
I need aprox. 100M division, so two 2^14 divider ICs would do.
But would they work if the input is the ANALOG fm signal?
Must I give them a digital input?
and how do you turn their count to a Number for the LCD/7seg?
Should I count them in a BCD counter and add a BCDto7seg for the display?
and if so, do i have to reset the counter every 1 sec to count correctly?

...isn't there a SINGLE IC that does that?
(but without a transmitter, cause I want to use mine...).

thanx for any response...
Fri Oct 13, 2006 10:36 am View user's profile Send private message
fasti
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Joined: 13 Oct 2006
Posts: 3

Post in addition... Reply with quote
oh, and I don't want to use a programmable IC...

...takes all the fun out of it...
Fri Oct 13, 2006 10:57 am View user's profile Send private message
pcs
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Joined: 18 Jan 2002
Posts: 3063
Location: Radio Land

Post Reply with quote
What you need is a frequency counter, search for that on google, you'll find plenty.

There are even some in our schematics section.

_________________
Best regards,
Marko - PCS Electronics
--------------------------------------------------------
Turn your PC into a FM radio station!
http://www.pcs-electronics.com
fax +386 4 2316 128
Fri Oct 13, 2006 12:50 pm View user's profile Send private message Visit poster's website
pulsecork
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Joined: 30 Sep 2006
Posts: 30
Location: CORK
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Post Reply with quote
NICE IDEA A freq counter but then the transmitter has to be broadcasting to get a reading right...
Fri Oct 13, 2006 4:22 pm View user's profile Send private message Visit poster's website
fasti
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Joined: 13 Oct 2006
Posts: 3

Post but you didn't answer me really... Reply with quote
Yes, well, thanx for your fast response,
but.. that didn't really answer me..

so, would a frequency counter be able to "read" an FM signal from the tank circuit even though it's not digital (can it work with a sine)?
(and I can't seem to find a frequncy counter/divider that works in the 100MHz area... please if anybody already knows one...)

And you didn't tell me, how does the frequency divider/counter make the 7seg value?
the output just goes up and down...
In a BCD counter, does it reset itself every 1 sec?
So wouldn't the display show the counting? 0,1,2,...100,000,000....
Fri Oct 13, 2006 5:34 pm View user's profile Send private message
pcs
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Joined: 18 Jan 2002
Posts: 3063
Location: Radio Land

Post Reply with quote
It is apparent from your question that you are very far from
understanding how a frequency counter works and even further from
constructing one on your own.

You'll be far better off if you look for a complete design or schematic,
with instructions and explanation included.

Yes, it will show the frequency of whatever signal you present to it,
but it must have adequate amplitude and the frequency counter must
be able to read a signal of that frequency.

_________________
Best regards,
Marko - PCS Electronics
--------------------------------------------------------
Turn your PC into a FM radio station!
http://www.pcs-electronics.com
fax +386 4 2316 128
Fri Oct 13, 2006 7:22 pm View user's profile Send private message Visit poster's website
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