- #1
aruna1
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hello guys I'm working on a line follower robot and i built following circuit(with the help of members in this forum ) as line sensor.
https://www.physicsforums.com/attachment.php?attachmentid=20782&stc=1&d=1254182755"
it uses LM324 opamp as a comparator and RED LED as a sensor.
Circuit does what is built to do-identifying difference between black-white surface but it still has little problem.if i touch the circuit while its working it changes its readings.-its like op amp responds to static charge(or something like that) in my body.
So i was thinking if I replace LM324 opamp with LM339 comparator IC will this help to solve the problem?
https://www.physicsforums.com/attachment.php?attachmentid=20783&stc=1&d=1254182755"
and is there any quad comparator IC with same pin out as LM324? (LM339 has different pin out so i will have to built circuit all again )
thank you
https://www.physicsforums.com/attachment.php?attachmentid=20782&stc=1&d=1254182755"
it uses LM324 opamp as a comparator and RED LED as a sensor.
Circuit does what is built to do-identifying difference between black-white surface but it still has little problem.if i touch the circuit while its working it changes its readings.-its like op amp responds to static charge(or something like that) in my body.
So i was thinking if I replace LM324 opamp with LM339 comparator IC will this help to solve the problem?
https://www.physicsforums.com/attachment.php?attachmentid=20783&stc=1&d=1254182755"
and is there any quad comparator IC with same pin out as LM324? (LM339 has different pin out so i will have to built circuit all again )
thank you
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