Engineering 44 mconyiah

Some re-hashing of what we did a week ago. We got our predictions wrong because there was a negative in the equation. Lab For some reason we did not get a picture of our pre-lab were we determined that 234Hz would be the best possible frequency for the lab. Here is the op amp with 234hz sin wave going into it. As you can see it is a perfect gain of one starting from -A since the equations showed that it would happen like that. The rest of the graphs are the same but at 500hz, 1kHz, and 2kHz

Don't know how to rotate the picture but this was just the pre-lab. We learned that it takes 5 delta to charge up a capacitor. Lab This lab was just us charging and discharging capacitors. Not much calculation was being use but we did learn how to trigger in waveform Discharging capacitor Same discharging capacitor but shifted Charging capacitor Charge/Discharge capacitor Summary It is what it is. What new is there to be said.

Move Time! Have you ever wanted to blow something up. Well you can't but above there is a capacitor exploding if the video works. This is how the solve the problem of charging a capacitor too fast. They add a resistor. A inductor would work better but why spend the money. When adding capacitors you add them like opposite of resistors. Taking the integral of graphs that represents the voltages going through an amp.  The following graphs are what we did on the white board but on the waveform. This was an induced wave at 1k Hz Same as the previous one but at 2k Hz Summary Each of the graphs acted the way that we thought we would. Some of the graphs as a flat peak witch means that we were most likely saturating the capacitor. Besides that the we nailed this one.

This day seemed very long but we did not take to much pictures because it was all straight forward. This was cascading amps which is basically two amps put together. This is not an new amp but the combination of two. Pretty straight forward. Here you can see the same equation just twice. Make sure you use the right equation. Cascading Amps Lab In this lab we just had to make a "bridge" along with a non-inverting amp. The hardest part of the lab was to make sure that the bridge was equal. This was two hard do to the fact that for use anyway a simple movement would cause or bridge to not be balance. This would cause our numbers to be off. Summary This lab was a big failure we did not win. We did not get tried of wining all the time. Because we totally lost. Even with the "pot" we could not get the bridge to be equal for too long.

This is a continuation of the day before. No longer are we just learning methods to solve problems. Now we have problems and need solve them.  We were task to predict how this Op-Amp will react using a AC-signal. We have been using DC-signals do to the fact it was easier to learn with. Here we predicted that there was going to be a signal ranging from 0 to 200. But we were wrong. The picture to the right was in fact our first problem but I mixed the two. We had the right idea of how the signal would look like but we forgot that since the lowest could only be zero volts we needed to shift everything up. Summing Amp Lab I like labs that has a lot of things going on the bread board. I have gone use to the Op 27. In this lab we are suppose to see what would happen with a summing op amp. In our pre-lab we calculated the theatrical output voltage then we tested the our hypotheses with the experiment. This is the white board...

Operational  Amplifier ( also known as Op-Amp) is the main topic of the day. Op-Amp does exactly what it sounds like it does. It increases the power that is supplied to it. However it doesn't create power out of know where. It depends on your power leads. Here we calculated the ratio that the voltages are going to be when you supply any voltage. The resistor will determine what the output will be. Lab This is our setup. We use a diagram online to make sure we used the right inputs and outputs for the OP 27. It was fairly simple since they made it really easy for you. We did run across some problems with the waveform because we did not turn on the 5v and -5v outputs, but we did figure it out at some point.                             Summary The graph above shows it all. We had an ideal slope. ...