Change the votage Scale

[Abu Ammora]

I have a ct that convert the frequency of square signal into DC value , the ct is based on that link :

**broken link removed**

**broken link removed**


But the problem is the o/p voltage is changing in order of mV (5mV To 180mV) when freq. increase from 1K to 10K , this voltage is too small and i want the range of change in order of hundred mV or in v , How can i do that , Any suggestion or Help ?

 

[dfullmer]

You might want to try a freq to voltage converter instead.


Try




good luck

dfullmer

 

[tiagocosta]

i want change my scale output that [1.825 - 3.125] transform in scale to [0 - 5]
how i can do this ?
i aprecciate your help

 

[chuckey]

If your max frequency is 10 KHz, then its period is 100 Microsecs, so if the mono stable is delivering a pulse of 50 Microsecs then you should get a mean DC out of 2.5V. At 1 KHz, its 1/10 so the output should be 1/10 i.e. .25V. Try increasing the value of CT.
Frank

 

[dr pepper]

I think its an LM2917 thats a special freq to volateg converter, they were common in rev counters and as far as I know still available, google for a datasheet.