Analogic comparator
Analogic comparator
Hello ,everybody
On a project ,I used an analogical comparator ,with two analogic data .
When one A>B or A<B ,it working good
But my problem take place when A=B ,there no signal on the outpin A=B when the two input analogic signal are equal .
Why or where is my problem ?
On a project ,I used an analogical comparator ,with two analogic data .
When one A>B or A<B ,it working good
But my problem take place when A=B ,there no signal on the outpin A=B when the two input analogic signal are equal .
Why or where is my problem ?
Re: Analogic comparator , A=B don't work when E1 and E2 equal !
Hello,
you should attach an example to the thread for comprehension what happened.
Many greetings,
tsd
you should attach an example to the thread for comprehension what happened.
Many greetings,
tsd
Re: Analogic comparator , A=B don't work when E1 and E2 equal !
Thanks for your reponse ,
I give you a picture part with 2v on A consign ,and you can see on the numeric meter ,2.0V ,and A=B don't appear.
I give you a picture part with 2v on A consign ,and you can see on the numeric meter ,2.0V ,and A=B don't appear.
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Re: Analogic comparator , A=B don't work when E1 and E2 equal !
Thanks much for who can help me for this problem
Re: Analogic comparator , A=B don't work when E1 and E2 equal !
Hi Tourneur,
try to offset the output A1 to zero. The variable resistor from the K8055 should be turned to a zero value.
Many greetings,
tsd
try to offset the output A1 to zero. The variable resistor from the K8055 should be turned to a zero value.
Many greetings,
tsd
Re: Analogic comparator , A=B don't work when E1 and E2 equal !
It's working good !
I turn my Analog input from K8055 to a 0v value ,and enter in the analog comparator a 0 value .
But how to work with another equal value ,if i desire enter a consign more high as 0 , like 1 , 2 or more ?
I turn my Analog input from K8055 to a 0v value ,and enter in the analog comparator a 0 value .
But how to work with another equal value ,if i desire enter a consign more high as 0 , like 1 , 2 or more ?
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Re: Analogic comparator , A=B don't work when E1 and E2 equal !
Hi Tourneur,
you should clean (delete) the crosspoint between input A and B of the comparator.
The output fom your K8055 will be added to both inputs (A and B) - so, never you will get an equal.
Greetings from
TSD
you should clean (delete) the crosspoint between input A and B of the comparator.
The output fom your K8055 will be added to both inputs (A and B) - so, never you will get an equal.
Greetings from
TSD
Re: Analogic comparator , A=B don't work when E1 and E2 equal !
I do it ,
So it's work ,but for pair consign number only ,like : 2 , 4 , 6, and 8 .
And not for the impair number like 1 , 3, 5, 7, and 9.
And it's the same thing for their multiple : ok for 20, 40, 60 and 80 no for 10, 30, 50 , 70, 90, and it's not working too for the no-decimal number ,like : 2.1 or 21 , 22 ,43 ,etc ...
So it's work ,but for pair consign number only ,like : 2 , 4 , 6, and 8 .
And not for the impair number like 1 , 3, 5, 7, and 9.
And it's the same thing for their multiple : ok for 20, 40, 60 and 80 no for 10, 30, 50 , 70, 90, and it's not working too for the no-decimal number ,like : 2.1 or 21 , 22 ,43 ,etc ...
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Re: Analogic comparator , A=B don't work when E1 and E2 equal !
Hello TOURNEUR
Your k8055 has a 8 Bit input with 5 Volt , there are ~ 0,019 Volt per Bit
Yuor Display has 0,1 Volt - so you can not see the right Display - and the compare doesn`t .
make your Display with 4 Digits right the decimal Point and you see the result.
Gerhard
Your k8055 has a 8 Bit input with 5 Volt , there are ~ 0,019 Volt per Bit
Yuor Display has 0,1 Volt - so you can not see the right Display - and the compare doesn`t .
make your Display with 4 Digits right the decimal Point and you see the result.
Gerhard
Re: Analogic comparator , A=B don't work when E1 and E2 equal !
Hello TOURNEUR
Here a little sample for the compare of 1 Digit right - that means compare
with 25.1 fixt between a input Display.
gerhard
Here a little sample for the compare of 1 Digit right - that means compare
with 25.1 fixt between a input Display.
gerhard
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Re: Analogic comparator
Hi evrybody !
Thanks a lot ,for you interest ,so I had test a new shematic ,
It 's include an electronical selector ,betwen my K8055 interface witch giving me 26.31 analogue value
With your help request ,now I use a 5 digit display ,and to compare ,if it can be an error ,of my wiring ,I use a fixed value of 26.31.
I,the last to command the selector a simple switch select the fixed value ,or my k8055 value .
So the result the same : there no fonctionality with my external interface .
Thanks a lot ,for you interest ,so I had test a new shematic ,
It 's include an electronical selector ,betwen my K8055 interface witch giving me 26.31 analogue value
With your help request ,now I use a 5 digit display ,and to compare ,if it can be an error ,of my wiring ,I use a fixed value of 26.31.
I,the last to command the selector a simple switch select the fixed value ,or my k8055 value .
So the result the same : there no fonctionality with my external interface .
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Zuletzt geändert von TOURNEUR am Donnerstag 27. Mai 2010, 22:51, insgesamt 1-mal geändert.
Re: Analogic comparator
So now ,I see problem witch is in my configuration interface, or I don't know where .
But You can see my K8055 ,first analogue input configuration "AI1"
You can see ,I had get two min / max value ,with 3 unity after 0 to can get a best accurancy (in thinking ,my problem ,can be here )
But You can see my K8055 ,first analogue input configuration "AI1"
You can see ,I had get two min / max value ,with 3 unity after 0 to can get a best accurancy (in thinking ,my problem ,can be here )
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