Basically, what I need here is make use of this comparator to act as a switch. As long as the user touchs it, it gives a logic 1 and releases it, it gives a logic 0, I'm using LM311 comparator. I am somehow making use of this main property of this LM311, the output is digital, either logic 1 (high) or logic 0 (low), cause its output is always either at its maximum value, or its minimum value.
I actually build a circuit exactly like one 1 source I got online. http://www.swarthmore.edu/NatSci/echeeve1/Class/e72/E72L2/Lab2(OpAmp).html
( Pls scroll to mid region )
Now, the question is after building out the circuit and testing the output on an ocilloscope, the output do not exhibit such property of IN+ (input 2) is greater than IN- (input 3), the output is high, IF IN- is greater than IN+ the output is low (ground, GND). Basically, the circuit is a very simple one, so there can't be much troubleshooting to be done, what left that makes me nto sure is whether two of the pin, pin 6 and 7, does it have any effects on the circuit? Pin 6 is balance strobe and pin 7 is balance, and I do not have much idea what is it for. Therefore I left it untouch.
Pls do not hesitate to share your comments or help, help is much appreciated.
I actually build a circuit exactly like one 1 source I got online. http://www.swarthmore.edu/NatSci/echeeve1/Class/e72/E72L2/Lab2(OpAmp).html
( Pls scroll to mid region )
Now, the question is after building out the circuit and testing the output on an ocilloscope, the output do not exhibit such property of IN+ (input 2) is greater than IN- (input 3), the output is high, IF IN- is greater than IN+ the output is low (ground, GND). Basically, the circuit is a very simple one, so there can't be much troubleshooting to be done, what left that makes me nto sure is whether two of the pin, pin 6 and 7, does it have any effects on the circuit? Pin 6 is balance strobe and pin 7 is balance, and I do not have much idea what is it for. Therefore I left it untouch.
Pls do not hesitate to share your comments or help, help is much appreciated.