Tabletop NMR

So I've been working on two things which are kind of overwhelming. There's the remaking of the pcb and the modeling of pieces for an AR model of the NMR we are building. The modeling is being done from scratch on tinkercad. Hassel has explained what most of the components are so I have an idea of what to build next, but I think I'll need more help identifying what is what. Along with the modeling, I have to start researching what is actually happening in the whole process of the NMR reading the chemical makeup of whatever is inside of it. When I have a step-by-step understanding of what goes on, I think modeling will get easier because we can display it like a movie. For example, there will be a current going through the coils which makes a magnetic field. That in itself is a small animation that can be done to show the electrons flow through the coils and make a field. But that's as far as I know. What happens after the field is created? How is the chemical makeup of t...

 This will just be a running list of all the 3D models I have made for Grace and the days done.  Torus arrow (6/21/21) Cone shaped spiral (6/22/21) Cone shaped spiral with a lower frequency (6/24/21) NMR AR models (6/24 - ) sample, transmit/receive coil, polarization coil (6/24)

Hassel, Grace, and I met with Lyniesha today to discuss ideas about AR and the app she created. One thing that really stood out to me was that she made this app over the course of about three years for her doctorate's thesis. Other than that confidence boost, I really liked an idea she proposed. I mentioned that I was working on troubleshooting the tabletop NMR and she said we could make that tabletop version into an AR version and almost try to animate the process to show exactly what happens.  That would require actually knowing what happens between the particles, so I guess I'll be researching more about NMR stuff. But since Grace is more familiar with Unity and the animations, I think I'll be more useful constructing the physical models for this project. I wouldn't mind learning Unity, but Grace is honestly doing really amazing with the current animations, I think I'd be better as an extra set of eyes and a model maker when I'm not working on the pcb/ waitin...

Something to remember: McColgan said we could possibly be meeting Lyniesha either 12-5 today or 10-5 Wednesday or Thursday. I need to make notes on her paper and formulate some questions/ideas to bring up. I tried reading it before, but it was really intensive and chemistry heavy. I'm personally terrible at understanding anything chemistry related, but I'm really going to try my best here :D After downloading the app 'H NMR MoleculAR', I tried to get a general feel for what it was supposed to do/be. I didn't get very far. It looks like the article is very chemistry intensive, so I'm kind of at a loss for understanding what majority/any of it means. I do like the ideas presented and the feedback from the students, proving it to be helpful.

 On 6/14/21 I finished my first version of the entire pcb and Hassel replied with some things to keep in mind/add while he makes sure all the connections are right. All solder pads on one side of board Right footprints All grounds go to arduino ground solder pad (He will make sure his board has it) Pin 4 of op-amps go to Vcc- (eagle cad says the connection isn't there even though I set it) Spread out components? Drill holes in corners Only 1 wire goes into the coil (no need for the 2 solder pads) transmitter sends the pulses in, while the receive circuit reads out the result. The relays control what's happening at any particular time. The other end of the coil should connect to the Arduino ground.  The blue wire across the top should just connect to the rightmost, topmost solder pad.

 Before getting into the revisions made and what needs to be made, Grace and I had a meeting with Dr. Hassel to go over some things with the PCB. Dr. McColgan also got Grace and I a meeting with Lyniesha Wright. She's co-author to "Development and Evaluation of the H NMR MoleculAR Application" and will be talking to us about what we can potentially do in AR to provide an educational aspect about the NMR. Aside from that- I have found the proper footprint for the relays and now have the ability to find the proper footprint for the capacitors in circuit c since Hassel has sent the datasheets for them. With the exception of needing to do that, I have built circuit b and c to *near* completion with the help of Grace looking it over.  It was very easy to replicate the schematic by just copying and pasting the components from Hassel's version. I think after completing the schematic and having Hassel look it over, I'm going to make two versions of the pcb: one where circ...

Before getting into the files, I attended a meeting to go over some git stuff for the Unity and AR project for Dr. McColgan's group. Good refresher on git, but still painful... I hope we won't need to use it much for this project. - Parts for circuit b (audio-frequency transmitter): 4 x 2kΩ resistor 1 x 12kΩ resistor 2 x 10kΩ resistor 1 x 1kΩ resistor 3 x 47kΩ resistor 2 x 1nF capacitor      (1nF=100pF) 1 x 100kΩ Potentiometer 1 - V_in 2 - V_out 3 - GND 3 x LF411 Op Amp 1 -  unused 2 -  - (end) 3 -  + (end) 4 - unused    [+ (side)] 5 - unused 6 - out (tip) 7 - unused    [- (side)] 8 - unused 1 relay  (HE700) L - 20.14mm W - 7.62mm H - 5.82mm Parts for circuit c (receiver): 1 x 330kΩ resistor 1 x 330Ω resistor 2 x 15kΩ resistor 1 x 370Ω resistor 1 x 150kΩ resistor 1 x 2kΩ resistor 1 x 1.5kΩ resistor 2 x 10nF capacitor 18nF capacitor  3 x LT1007 Op Amp 2 x relays Notes from ANMR PCB Board Progre...

After attending meetings with Dr. McColgan and Dr. Hassel, Grace and I have decided to stay on track with the project at hand with Dr. Hassel but keep in mind to think of ideas for McColgan's augmented reality research. After going through videos and learning what an NMR really is as well as receive the eagle cad files and arduino code from Hassel, I think I can finally start!  My hope is to look and compare Hassel's model with Michal 's schematic and see if there are any differences that could be causing the malfunction. If nothing is wrong, then I guess the problem lies in the arduino code. (Hopefully it's just an eagle cad error which should be relatively easy to fix.) I have a few questions after looking over some files and the vids: polarization coil for circuit c is built? correct diodes? does the  IRFP4768 Transistor need to be on the breadboard? 4N46 chips pinouts (make sure these are correct) using this arduino? spin-echo a possibility to explain the noise?