Thursday, March 10, 2016





    Week 8



     For our Rube Goldberg project we visioned using the circuit setup with a fan to push over the dominoes to create the effect to hit a ball. This ball would then roll down a tube to hit more dominoes to fall further and eventually end at a ball to knock over a set of blocks. After setting everything up we had to eliminate a few things as it was hard to recreate the exact setup we had planned. Our problems throughout the week started with getting the circuit to act how we wanted. Originally we wanted the digital part of the circuit with an OR gate to power the temperature sensor to power the op amp and the relay to start our motor. After spending a lot of time on the circuit, it was finally realized that we had the wrong op amp to make the relay work properly. This was realized the night before and had to rush to get the right op amp resistors correct to increase the temperature on the sensor that starts at around .7 volts to be amplified to the 5.5 volt range to switch the relay. The presentation didn't go as planned for the dominoes as our ball completely bounced over the dominoes. The circuit itself worked as planned until the dominoes didn't apply enough force on the resistor.











11 comments:

  1. Great ideas guys, too bad it did not work quite as well as you hoped. I understand what you were trying to do. The set up looks pretty good and I like you you involved the dominoes on the floor. This is great to think of ideas that will be separate from the table top since we will be having a huge rube goldberg project as a class. We will definitely need actions that will allow the transfer of motion from one row of benches to the other and this gives us all great ideas.

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    1. Thanks! I think we should have added more dominoes at the bottom to insure that the setup worked

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  2. The setup was very simple and I also like how you had the dominoes on the floor. I think if the position of the tube was different, the ball wouldn't have missed, but overall nice idea. When we do the rube goldberg as a class, I think having a setup on the floor would be pretty cool. Nice job.

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    1. Thanks! Yeah we should have positioned it better or ran a few more trials but time was short.

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  3. I think more explanation is needed. I can see on your breadboard that you used the LED and display in your circuit, but I don't think you explain how these things work within your Rube Goldberg. Also I'm assuming your motor set off the domino effect, but aside from mentioning you planned to use the motor to turn on a fan, I don't think you explained how you implemented your motor in the final setup.

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    1. We wanted to originally use a fan but the motor to knock over the dominoes was easier and quicker to setup

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  4. I like the creativity of your set up with the ramp and materials you used. I know you guys were working on it all night the day before so I'm glad you got it working. What other issues did you have as far as design or what the end result of the rube goldberg would do? The circuit seemed to work perfectly but the actual result seemed like it would have only taken a couple seconds.

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  5. Our group had the same issue with the ball rolling through the tube too fast and missing the object it was supposed to hit at the end. we ended up slowing it down by having it hit a piece of paper at the end of the tube. You guys could try to somehow slow the ball down to make sure it hits the dominoes on the floor.

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    1. Yeah that is a good idea. I think if we do a setup like this too it would be good to add more dominoes at the bottom to insure it gets hit.

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  6. Not enough explanation on the blog.

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  7. Also, I wish it worked during the demo.

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