Sensor interface to microcontroller

[milabut]

Thanks, but few have complained that my accent is non English ,how do you find it?Of course my mother tongue is not English so it may not match to that of US standards.

Better take for the reference voltage the pot not for the LDR

[aerofart]

Nice explanation, Professor. I always enjoy your lessons.

I designed a circuit similar to this using two AND gates and two LDRs for use in a photo-vore robot . . . works very well. I suggest using a potentiometer in the voltage divider circuit for the signal voltage pin, or even for the reference voltage . . . makes it easier to fine-tune for the differences in resistance in the LDRs . . .

[milabut]

Take LP339 instead of LM339 both are same.To change the power value right clck on the power and then write on the box that appears +12V (for 12 volt for example)

[alitou001]

please how do you set the power value ?

I am trying to simulate this circuit but it generates an error (no model specified for the LM339) ,i have the version 7 . did you face such error while trying to simulate this circuit?if so please tell me how did you get it to work. thank you.

[1974faraz]

Sir would u like to tell me which software u are using .

thanks

[heberorozco]

@1974faraz i guess he doesnt want to tel you hehehe

[milabut]

@heberorozco

it is proteus from labcenter UK

[milabut]

@1974faraz

it is proteus from labcenter UK

[smashbirdie]

very nice explanation, keep posting. Thanks