What are two uses for Op-Amps?
A: Comparator circuits and amplifier circuits.What are the two main types of amplifier configurations used with Op-Amps?
A: Inverting Vo = (-R2/R1)Vi
Non-inverting Vo = (1 + R2/R1)ViHow can an Op-Amp be used as a comparator?
A: Connect unknown voltage to Vin (pin 3 - non-inverting side), and connect a known voltage to Vref (pin 2, inverting side), then connect battery anode to positive power rail (pin 7) and connect negative power rail (pin 4) to ground. The out pin will produce a voltage (HIGH state) when Vin > Vref.
Of course, the video's schematic has pins 3 and 2 flipped to the comparator shown in formulas.pdf and the amplifier circuits, which is very confusing. It also seems to be using the non-inverting side (+) as Vref. I guess both methods work but I used the above method (high state when Vin > Vref) and it worked in Multisim.
Please let me know if "the right way to do it" is using inverting side (-) as Vin.What are the 5 main pins of a standard Op-Amp?
A: Vin, Vref, Powerrail +, Powerrail -, OUT
I'm having trouble building the amplifier circuits shown in formulas.pdf, I guess I probably need another voltage source somewhere but I'm not sure how. Here's what I've got so far, help would be much appreciated:http://i.imgur.com/PkmU1.png