pic+741

[yashshailesh]

 

hello sir;

i m new here. my problem that i m doing a test using switch.

when i m connecting a switch to PIC controller , the controller is working means stepper is moving forward and reverse according to switch ON and OFF. But when i am connecting out put of above circuit which i have post above (means out pin 6 of op-amp) it not detecting switching and moving only one direction.

the out put voltage at pin 6 of is 1.46 even no signal receiving by IR LED(Receiver Led) from the transmitter Led.is problem this ,means at logic zero voltage is 1.46 .

how i can remove this voltage to zero. please help me.

[Hemraj]

Firstly isolate both circuits i mean analog and Microconreoller and check the output of 741 . is it going high and low on the basis of your sensor. if not then check your circuit. or if yes then

Which pic microcontroller you are using. Are you using anlog pins for input. if yes then make them D/I .

Put pull up resistance on that pin.

 

Hemraj

[yashshailesh]

thanks,

          port D of pic16f877a using as input.

[Hemraj]

Your problem solved or not.

[Author]

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