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     -~-~-~-~-~-~ hardware hacker and design deliriant ~-~-~-~-~-~-
╔══════════════════[ Projects ][ About ][ Contact ]═══════════════════╗
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╟┐                                                                   ┌╢▐
╠╪════════════════: Pintwood Derby: The Cheetah Car :════════════════╪╣▐
╟┘                                                                   └╢▐
ChIDEO's Pintwood Derby is an annual competition similar to     ║▐
║     Pinewood Derby, but with more lenient rules. The Cheetah        ║▐
║     Car was a clever miniature car designed to skirt the rules      ║▐
║     and try a new approach to the race. In addition to being        ║▐
║     fast, the car had two motorized wings that could be             ║▐
║     triggered to swing out and stop a competitor from passing.      ║▐
║     An iPhone app disguised to look like the stock iOS camera       ║▐
║     app was used to trigger the wings via Bluetooth mid-race.       ║▐
║                                                                     ║▐
║     
║▐ ║ ║▐ ║ ║▐ ║ ║▐ ║ ║▐ ║ ║▐ ║ ║▐ ║ ║▐ ║ ║▐ ║ ║▐ ║ ║▐ ║ ║▐ ║ ║▐ ║ ║▐ ║ ║▐ ║ ║▐ ║ ║▐ ║ ║▐ ║ ║▐ ║ ║▐ ║ ║▐ ║ ║▐ ║ ║▐ ║ ║▐ ║ Cars needed to be within the dimensions of 3" x 7" x 2.75", ║▐ ║ and they could not weigh more than 10.0 ounces. We were ║▐ ║ also required to use all four of the wheels and axel pins ║▐ ║ given to us (aka we could not create custom wheels with ║▐ ║ bearings). Finally, we could not modify our vehicles in the ║▐ ║ following ways: ║▐ ║ ║▐ ║ - Starting or finish line devices ║▐ ║ - Glass or extremely fragile parts ║▐ ║ - Paint that is wet or sticky ║▐ ║ - Sharp objects ║▐ ║ - Propellants ║▐ ║ - Mechanically altered rotation of axles and/or wheels ║▐ ║ ║▐ ║ This is where we had some fun! There was no rule about ║▐ ║ affecting other racers. The rules talk about starting and ║▐ ║ finishing devices, but nothing about a device that operates ║▐ ║ mid-race. Additionally, it sounds like the car only has to ║▐ ║ pass the dimensions and weight check pre-race, so what if ║▐ ║ the car was capable of transforming itself after it was ║▐ ║ checked in? Lastly, motors are not explicitly banned, just ║▐ ║ using them to propel or alter wheel rotation is. Playing by ║▐ ║ these 'rules' and assumptions, we created the Cheetah car ║▐ ║ to push the bounds (and likely create new bounds for future ║▐ ║ events) of pintwood derby racing. ║▐ ║ ║▐ ║
║▐ ║ ║▐ ║ ║▐ ║ ║▐ ║ ║▐ ║ ║▐ ║ ║▐ ║ ║▐ ║ ║▐ ║ ║▐ ║ ║▐ ║ ║▐ ║ ║▐ ║ ║▐ ║ ║▐ ║ ║▐ ║ ║▐ ║ ║▐ ║ ║▐ ║ ║▐ ║ ║▐ ║ ║▐ ║ ║▐ ║ ║▐ ║ The brains of the Cheetah car is a Bluetooth enabled ║▐ ║ microcontroller (Simblee), and it connects to two separate ║▐ ║ H-bridge drivers that control the wings' motors, allowing ║▐ ║ the wings to open and close. The wings were machined on a ║▐ ║ slight opening angle to make sure they catch the front of a ║▐ ║ competitor's car. The iPhone app sends messages to the ║▐ ║ car's microcontroller to select which wing(s) to control ║▐ ║ (left, right, or both) and what direction to move them (in ║▐ ║ or out). The car's weight was maximized (staying within the ║▐ ║ limit) with a lead weight in the very rear. ║▐ ║ ║▐ ║
║▐ ║ ║▐ ║ ║▐ ║ ║▐ ║ ║▐ ║ ║▐ ║ ║▐ ║ ║▐ ║ ║▐ ║ ║▐ ║ ║▐ ║ ║▐ ║ ║▐ ║ ║▐ ║ ║▐ ║ ║▐ ║ ║▐ ║ ║▐ ║ ║▐ ║ ║▐ ║ ║▐ ║ ║▐ ║ ║▐ ║ ║▐ ║ ║▐ ║ ║▐ ║ ║▐ ║ ║▐ ║ ║▐ ║ ║▐ ║ ║▐ ║ ║▐ ║ ║▐ ║ ║▐ ║ ║▐ ║ ║▐ ║
║▐ ║ ║▐ ║ ║▐ ║ ║▐ ║ ║▐ ║ ║▐ ║ ║▐ ║ ║▐ ║ ║▐ ║ ║▐ ║ ║▐ ║ ║▐ ║ ║▐ ║ ║▐ ║ ║▐ ║ ║▐ ║ ║▐ ║ ║▐ ║ ║▐ ║ ║▐ ║ ║▐ ║ ║▐ ║ ║▐ ║ ║▐ ║ ║▐ ║ ║▐ ║ ║▐ ║ ║▐ ║ ║▐ ║ ║▐ ║ ║▐ ║ ║▐ ║ ║▐ ║ ║▐ ║ ║▐ ║ ║▐ ║ ║▐ ║ ║▐ ║ ║▐ ║ ║▐ ║ ║▐ ║ ║▐
╟┐                                                                   ┌╢▐
╠╪═══════════════════════════: Projects :════════════════════════════╪╣▐
╟┘                                                                   └╢▐
║     DEF CON 31 Hardware Hacking Village CTF .............. 2023     ║▐
║     THOTCON 0xC Electronic Conference Badge .............. 2023     ║▐
║     DEF CON 30 Hardware Hacking Village CTF .............. 2022     ║▐
║     ParFive: a Daily Golf-Themed Word Game ............... 2022     ║▐
║     THOTCON 0xB Electronic Conference Badge .............. 2022     ║▐
║     DEF CON Hardware Hacking Village CTF ................. 2021     ║▐
║     SAOwner: Electronic Badge i2c Interposer ............. 2019     ║▐
║     Pintwood Derby: Team Cheetah Strikes Again ........... 2019     ║▐
║     Commuter - Game and Controller ....................... 2018     ║▐
║     crAPU: crappy Audio Processing Unit SAO for DC26 ..... 2018     ║▐
║     Pintwood Derby: the Cheetah Car ...................... 2018     ║▐
║     RAND: IDEO Chicago Installation ...................... 2017     ║▐
║     Ox Vox: DEF CON 25 and BSidesPDX Badge Hack .......... 2017     ║▐
║     Upgrading the Oxygen Concentrator Inferface .......... 2017     ║▐
║     Giving Furby a New Voice Box ......................... 2017     ║▐
║     Cigar Mic: DEF CON 24 Badge Hack ..................... 2016     ║▐
║     Personal Logo Design ................................. 2014     ║▐
║     9-Degrees of Freedom Wireless IMU .................... 2014     ║▐
║     BitSynth: Controlled Quantization Synth .............. 2013     ║▐
║     Psychomasker: Audio Compression Visualization App .... 2013     ║▐
║     Bike Design Using Webcode ............................ 2013     ║▐
║     Canal Construction Logo Design ....................... 2013     ║▐
║     Record Player Design Using Webcode ................... 2013     ║▐
║     Subzero: Refrigerator Subwoofer ...................... 2013     ║▐
║     Shark Attack Game for iPad ........................... 2013     ║▐
║     Gardner Nested All-Pass Filter Reverb Plugin ......... 2013     ║▐
║     Slam Mixer Audio Mixer App for iPad .................. 2013     ║▐
║     Roland Space Echo Audio Plugin ....................... 2013     ║▐
║     MIDIogame Controller: Creating Music From Gameplay ... 2012     ║▐
║     Car Charger Technical Illustration ................... 2012     ║▐
║     eVORG Logo Designs ................................... 2012     ║▐
║     Newark Bike Project Designs .......................... 2012     ║▐
║     DEFCON 19 Bot Badge .................................. 2010     ║▐
║     WiiAssist: 3D Head Tracking with Wiimotes ............ 2009     ║▐
║     Off-the-Shelf Open Source Security System ............ 2009     ║▐
╟┐                                                                   ┌╢▐
╠╪═════════════════════════════: About :═════════════════════════════╪╣▐
╟┘                                                                   └╢▐
Part hardware hacker, part creative technologist, and part      ║▐
║     human-centered designer thriving at the cross-section of        ║▐
║     engineering and design.                                         ║▐
║                                                                     ║▐
║     Led to engineering through my love for music, art, and          ║▐
║     math, I hold degrees in electrical, computer, and music         ║▐
║     engineering. Following a stint in academia, I joined IDEO       ║▐
║     as a senior electrical engineer where I contributed             ║▐
║     creative problem solving and prototyping fluency to a           ║▐
║     breadth of projects ranging from vehicles of the future, to     ║▐
║     life-changing medical equipment, to innovative children's       ║▐
║     toys. Most recently, I was at Delve and now Sundberg-Ferar,     ║▐
║     diving deeper into engineering for production, and working      ║▐
║     on bringing ideas and prototypes to reality.                    ║▐
║                                                                     ║▐
║     Outside of work, I enjoy creating rotoscopes and                ║▐
║     illustrations, reverse engineering electronic toys, and         ║▐
║     taking a break from screens by running, biking, and camping     ║▐
║     in the great outdoors.                                          ║▐
╟┐                                                                   ┌╢▐
╠╪═══════════════════════════: Education :═══════════════════════════╪╣▐
╟┘                                                                   └╢▐
║   -=≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡ MS in Music Engineering ≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡=-   ║▐
║     School .... University of Miami, Miami, FL                      ║▐
║     Grad year . 2014                                                ║▐
║                                                                     ║▐
║   -=≡≡≡≡≡≡≡≡ MS in Electrical and Computer Engineering ≡≡≡≡≡≡≡≡=-   ║▐
║     School .... University of Delaware, Newark, DE                  ║▐
║     Grad year . 2012                                                ║▐
║                                                                     ║▐
║   -=≡≡≡≡≡≡≡≡≡≡≡≡≡≡ BEE in Electrical Engineering ≡≡≡≡≡≡≡≡≡≡≡≡≡≡=-   ║▐
║     School .... University of Delaware, Newark, DE                  ║▐
║     Grad year . 2011                                                ║▐
╟┐                                                                   ┌╢▐
╠╪══════════════════════════: Experience :═══════════════════════════╪╣▐
╟┘                                                                   └╢▐
║   -=≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡ Senior Electrical Engineer ≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡=-   ║▐
║     Company ... Sundberg-Ferar, Detroit, MI                         ║▐
║     Key roles . Launched and led Electrical Engineering offering    ║▐
║               . Developed embedded hardware and software products   ║▐
║               . Managed projects and client relationships           ║▐
║               . Designed from prototype through manufacturing       ║▐
║     Years ..... May '22 - Present                                   ║▐
║                                                                     ║▐
║   -=≡≡≡≡≡≡≡≡≡≡≡≡≡≡ Senior II Electrical Engineer ≡≡≡≡≡≡≡≡≡≡≡≡≡≡=-   ║▐
║     Company ... Bresslergroup / Delve, Philadelphia, PA             ║▐
║     Key roles . Developed embedded hardware for diagnostic devices  ║▐
║               . Developed embedded firmware with precision-timing   ║▐
║               . Designed for manufacturing                          ║▐
║     Years ..... Nov '20 - Apr '22                                   ║▐
║                                                                     ║▐
║   -=≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡ Senior Electrical Engineer ≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡=-   ║▐
║     Company ... IDEO, Chicago, IL                                   ║▐
║     Key roles . Specialized in rapid hardware prototyping           ║▐
║               . Developed embedded and front-end software           ║▐
║               . Designed human-centered solutions for clients       ║▐
║     Years ..... Sep '14 - Oct '20                                   ║▐
║                                                                     ║▐
║   -=≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡ User Experience Intern ≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡=-   ║▐
║     Company ... Shure, Niles, IL                                    ║▐
║     Years ..... Summer '13 & Summer '14                             ║▐
║                                                                     ║▐
║   -=≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡ Graduate Research Assistant ≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡=-   ║▐
║     Company ... Univ. of Miami, Music Eng Dept, Miami, FL           ║▐
║     Years ..... Aug '12 - May '14                                   ║▐
║                                                                     ║▐
║   -=≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡ Co-Founder and Shop Manager ≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡=-   ║▐
║     Company ... Newark Bike Project, Newark, DE                     ║▐
║     Years ..... Oct '11 - Aug '12                                   ║▐
║                                                                     ║▐
║   -=≡≡≡≡≡≡≡≡≡≡≡≡ Undergrad/Grad Research Assistant ≡≡≡≡≡≡≡≡≡≡≡≡=-   ║▐
║     Company ... Univ. of Delaware, Elec/Comp Eng Dept, Newark, DE   ║▐
║     Years ..... Feb '09 & Aug '12                                   ║▐
╟┐                                                                   ┌╢▐
╠╪════════════════════════════: Skills :═════════════════════════════╪╣▐
╟┘                                                                   └╢▐
║                   -=≡≡≡≡≡≡≡ Engineering ≡≡≡≡≡≡≡=-                   ║▐
║     Hardware Hacking     3D CAD Modeling  Embedded Dev & Design     ║▐
║     Reverse Engineering    Prototyping    Human-Centered Design     ║▐
║     Digital Synth Design   PCB Design    Human-Comp Interaction     ║▐
║                                                                     ║▐
║                   -=≡≡≡≡≡≡≡≡ Languages ≡≡≡≡≡≡≡≡=-                   ║▐
║     C, C++, Obj-C           HTML, CSS             Spanish (int)     ║▐
║     Basic Assembly         Javascript            Japanese (beg)     ║▐
║     Matlab                   Python                                 ║▐
║                                                                     ║▐
║                   -=≡≡≡≡≡≡≡≡ Software ≡≡≡≡≡≡≡≡≡=-                   ║▐
║     Adobe Creative Cloud Autodesk Fusion          Microsoft 365     ║▐
║                                                                     ║▐
║                   -=≡≡≡≡≡≡≡≡≡≡ Other ≡≡≡≡≡≡≡≡≡≡=-                   ║▐
║     Screen Printing       Bike Mechanic        Furby Technician     ║▐
║     Sketching             Illustrating                              ║▐
╟┐                                                                   ┌╢▐
╠╪═══════════════════════: Honors and Awards :═══════════════════════╪╣▐
╟┘                                                                   └╢▐
║     2nd Place NorthSec CTF ............................... 2022     ║▐
║     1st Place DerbyMUD CTF, Derbycon 9.0 ................. 2019     ║▐
║     1st Place Digerati's Atlas CTF, THOTCON 0xA .......... 2019     ║▐
║     2nd Place Badge CTF, THOTCON 0x9 ..................... 2018     ║▐
║     2nd Place Music Hack Day Miami ....................... 2014     ║▐
╟┐                                                                   ┌╢▐
╠╪════════════════════════════: Contact :════════════════════════════╪╣▐
╟┘                                                                   └╢▐
║     Email .................................... website@<domain>     ║▐
║     Blog ............................................. reset.io     ║▐
║     Github ......................................... mediumrehr     ║▐
║     Codepen ......................................... robrehrig     ║▐
╟┐                                                                   ┌╢▐
╠╪════════════════════════════: Greetz :═════════════════════════════╪╣▐
╟┘                                                                   └╢▐
║                   .:  Malörtware & cold_root  :.                    ║▐
║                                                                     ║▐
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