ECE 110/120 Honors Lab Section : WaveBubble Tunable RF Jammer

1. Introduction
   
   
   1. Statement of Purpose
      
      Please provide a brief description of your project. List the goals and objectives of your project and explain why this project is useful for the problem your group want to solve or functions that make your project unique.
      
      Our group wants to create a portable and tunable radio frequency jammer entirely from scratch. The purpose in assembling and creating it entirely from scratch is to gain a ground up understanding of the abstractions that go into making a complex project. By the end, we hope to be able to create and emit radio waves that are inverses of the frequency that we aim to "jam", while also understanding the purpose and function of each component of the project. The project as a whole deals heavily with analog signal processing (very useful for ECE210), integrated circuits, and assembly language (programing of microcontrollers); this makes it a unique project in the sense that it simple enough to be feasible (since the idea is not ours, it comes with detailed instructions while also leaving room for the builder to learn), yet it is also complex enough to resemble a little computer. 
      
      
   2. Background Research
      
      Our group has the schematics for the circuits, firmware, and parts list in hand. We are confident that with this thorough guide, we will be able to make a device that emits tunable frequencies of radio waves. In terms of research, we feel that a guide as complete yet complex as this would give us the best learning experience and results. While researching the project, we found that similar projects can be made with a raspberryPi computer and some antennas, however it would be neither as satisfactory to our goal of making a project from the ground up, nor efficient in its results. This project also touches upon both the electrical aspect and the computer aspects of ECE, serving as a big circuit while also having a Digital section that alters the waves; it is a project that would give us great pride if we were able to build it. We are all interested in circuitry, and it would be amazing to see the simplest parts of circuits (capacitors, inductors, etc) come to life in a project of this complexity. 
      
      
2. Design Details
   
   
   1. Block Diagram / Flow Chart
      
      Our project is essentially one big circuit with a second part that is a little computer. Because of this there is no easy way to represent all the parts of it. The following is the attempt at the block diagram.
      
      
      and here is actual schematic.
      
      
      
3. Parts
   
   A full parts list can be found in the subcategories of the "Make" section of http://www.ladyada.net/make/wavebubble/prep.html
   
   ~ $20  PCB (x4) (https://jlcpcb.com/quote#/?orderType=1&stencilWidth=80&stencilLength=80&stencilCounts=5&stencilLayer=2&stencilPly=1.6&steelmeshSellingPriceRecordNum=A8256537-5522-491C-965C-646F5842AEC9&purchaseNumber=)
   ~ $5    Battery (ECE Supply center)
   ~ $15  Power Supply (includes ICCs, resistors, capacitors, etc) (ECE Supply Center may have most of these) 
            (http://www.ti.com/product/TPS79333-EP/samplebuy)(http://www.ti.com/product/LM2733) .                                             (https://www.digikey.com/product-detail/en/linear-technology-analog-devices/LT1301CS8-PBF/LT1301CS8-PBF-ND/889342)
   ~ $5   Tuning system (various parts, mostly resistors) (ECE Supply center) (https://www.digikey.com/product-detail/en/analog-devices-inc/AD8402ARZ10-REEL/AD8402ARZ10-REELCT-ND/4907479) (https://www.microchip.com/wwwproducts/en/ATmega88)
   ~ $25 Voltage Controlled Oscillator (https://www.alibaba.com/product-detail/NEW-ORIGINAL-ROS-2500-ROS-2500_60683034824.html)
   ~ $6 Phase Locked Loop (https://www.electronicspecifier.com/product-centre/texas-instruments/part/517a698ce34e24f40f09d77e)
   ~ $3 Gain stage (https://www.digikey.com/product-detail/en/rfmd/SXA-389B/SXA-389B-ND/937150)
   ~ $30 Antennas (https://www.digikey.com/product-detail/en/linx-technologies-inc/ANT-868-CW-HWR-RPS/ANT-868-CW-HWR-RPS-ND/1139573) (https://www.digikey.com/product-detail/en/linx-technologies-inc/ANT-868-CW-HW-SMA/ANT-868-CW-HW-SMA-ND/5592340)

                TOTAL:  $110 - $120

https://www.digipart.com/part/SXA-389B
          4. Possible Challenges

               Our biggest challenge is dealing with the sheer amount of parts in the project. Furthermore, many of the parts are small and require precise soldering. Managing the complexity of the entire circuit board will likely be tough, however we aim to                                        compartmentalize it into the three main sections (top middle and bottom loops as seen on the schematic) which should make it a much more manageable build. Assembling the project might become overwhelming at times, but with the right                                        resources we are positive that we will be able to succeed.

          5. References

            This project is entirely designed by the people behind the Wave Bubble project, including Lady Ada (owner of adafruit industries). We do not take any credit for the work or the idea behind it, rather we simply want to build it and learn from it. More on the                project can be found in the link in the citation. 

            - Fried, L. (2011). Wave Bubble: A design for a self-tuning portable RF jammer. [online] Ladyada.net. Available at: http://www.ladyada.net/make/wavebubble/index.html [Accessed 15 Feb. 2020].