Timer counter with Comparator

[Osama Mohammed]

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

I want to ask why the pulses that come from the output of the comparator do not increase the counter ( Timer 1 ) value, meanwhile, using a single pulse generator increase it ,although they are all high and low pulses !! I really don’t know why !! can anyone please help me 

[Ashutosh Bhatt]

where is biasing of OP-Amp circuit?

i see nothing is connected to R4, R2 and pin 7 of OP amp

[Osama Mohammed]

there is a biasing 

 

the (triangle) sympol above the op-amp is a dc 6 volt biasing 

[Ashutosh Bhatt]

its not biasing my dear, its probe. for measuring

 

select Vcc bias or battery source to give proper biasing to OP amp circuit

[Osama Mohammed]

its a Dc voltage ,go to proteus and see 

[Ashutosh Bhatt]

ok

just connect scope at the output of op-amp and see r u getting pulses or not?

[Author]

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