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{{Short description|American entrepreneur and computer chip designer}}
{{Infobox person
{{Use mdy dates|date=November 2019}}
|name = Jeri Ellsworth
{{Infobox person/Wikidata
|image = You're_one_baaad_cat.jpg
| name = Jeri Ellsworth
|image_size = 225px
|caption = Jeri Ellsworth, 2008 | image = Jeri Ellsworth CAX 2009.jpg
| alt = Jeri Ellsworth, 2009
|birth_date =
| caption = Ellsworth at California Extreme (Classic Arcade Games Show), 2009<ref>{{cite web |url=http://www.caextreme.org/ |title=Home |website=caextreme.org}}</ref>
|birth_place = ]
| birth_date = {{Birth date and age|1974|08|14}}
|death_date =
| birth_place = ], United States<ref name="engadget.com">{{cite web|url=https://www.engadget.com/2014/10/17/castar-augmented-reality/|title=castAR bets big on its augmented reality hardware with move to Silicon Valley|work=Engadget|first=Nicole|last=Lee|date=October 17, 2014|access-date=February 7, 2015}}</ref>
|death_place =
| death_date =
|other_names = cm_easy
| death_place =
|known_for = ] and ] ] designer
| known_for =
|occupation = Consultant
| employer = Tilt Five
|nationality = American
| occupation = ]<br />]er
| fetchwikidata=ALL
}} }}
]


'''Jeri Ellsworth''' is an ] ] and ] ] designer. She is best known for creating a ] emulator within a ], in 2004, called ]. That "computer in a joystick" could run 30 video games from the early 1980s, and was very popular during the 2004 Christmas season, at peak selling over 70,000 units in a single day via the ] ].<ref name="NYT">{{cite news |first=John |last=Markoff |work=] |date=December 20, 2004 |url=http://www.nytimes.com/2004/12/20/technology/20joystick.html?ex=1261198800&en=0e285af90f620c58&ei=5090 |title=A Toy with a Story}}</ref> Ellsworth currently lives in Seattle.<ref name="YouTube">{{cite video |first=Jeri |last=Ellsworth |date=November 4, 2012 |url=http://www.youtube.com/watch?v=DTCtx9eNHXE#t=6 |title=Short Circuits - One Bit ADC}}</ref> '''Jeri Janet Ellsworth''' (born August 14, 1974) is an American ], ] designer and inventor. She gained fame in 2004 for creating a complete ] ] ] housed within a ], called ].<ref>{{Cite web|url=https://esc-sv09.techinsightsevents.com/keynotes/|title = Keynote Addresses &#124; ESC Silicon Valley}}</ref><ref name="nytimes-2004-12-20-Markoff"/> It runs 30 video games from the 1980s, and at peak, sold over 70,000 units in a single day via the ] ].<ref name="nytimes-2004-12-20-Markoff"/>


Ellsworth was hired by ] to develop augmented reality hardware, but was terminated in 2013. She co-founded ] to continue the work—with permission—but the company shut down on June 26, 2017 without completing development.<ref name="benchoff">{{cite web|last1=Benchoff|first1=Brian|title=CastAR Shuts Doors|url=https://hackaday.com/2017/06/27/castar-shuts-doors/|website=Hackaday|date=June 27, 2017}}</ref><ref>{{Cite web|url=https://theamphour.com/394-jeri-ellsworth-and-the-demise-of-castar/|title=#394 – Jeri Ellsworth and the demise of CastAR|date=2018-05-29|website=The Amp Hour Electronics Podcast|language=en-US|access-date=2018-12-27}}</ref> She started another company, Tilt Five, to create AR hardware based on the same principles.
== Biography ==
Ellsworth was born in ], and grew up in the town of ], where she was raised by her father, a local ] ] owner. As a child, she persuaded her father to let her use a ] computer which had been originally purchased for her brother. She taught herself to program by reading the C64's manuals. While at high school, she drove ] with her father, and then began designing new models in his workshop, eventually selling her own custom race cars. This allowed her to drop out of high school to continue the business.


Ellsworth has publicly talked about various homebrew projects, such as how to manufacture semiconductor chips at home.<ref>{{Cite podcast|date=2018-04-30|title=#390 – An Interview with Sam Zeloof|url=https://theamphour.com/390-an-interview-with-sam-zeloof/|access-date=2021-02-17|website=The Amp Hour Electronics Podcast|language=en-US}}</ref>
In 1995, at the age of 21, she decided that she wanted to get away from the race car business{{Citation needed|date=August 2010}}, and she and a friend started an early ] 486-PC-based business, assembling and selling computers. When she and her partner <!-- who? --> later had a disagreement, Ellsworth opened a separate business in competition. This new business became a chain of four stores, "Computers Made Easy", selling computer equipment in towns in Oregon.<ref name="Monahan">{{cite news|last=Monahan |first=Matt |date=January 25, 2005 |url=http://159.54.226.83/apps/pbcs.dll/article?AID=/20050125/BUSINESS/501250320 |archiveurl=http://web.archive.org/web/20060221204134/http://159.54.226.83/apps/pbcs.dll/article?AID=/20050125/BUSINESS/501250320 |archivedate=2006-02-21| title=Joy of electronics sticks with woman, sparking invention |publisher='']'' |accessdate=2011-03-22}}</ref> She ran that chain until selling it in 2000, at which point she moved to ] and attended ], studying circuit design for about a year. She dropped out due to a "cultural mismatch"; Ellsworth said that questioning professors' answers was frowned upon.<ref name="NYT"/>


== Early life ==
In 2000, Ellsworth attended her first Commodore exposition, where she unveiled a prototype video expansion for the C64. This project later evolved to become the CommodoreOne, a.k.a. the ], and ].
Ellsworth was born in ]<ref name="engadget.com"/> and grew up in the towns of ] and ]. Her mother died when she was one.<ref name="Ellsworth-talks">{{Citation |last1=Fuller |first1=Brian |date=May 6, 2011 |quote=Jeri Ellsworth, who keynoted at ESC Silicon Valley 2011, talks about her remarkable life and career and innovations with EE Times |title=Jeri Ellsworth, self-taught engineer, talks about her career|url=https://www.youtube.com/watch?v=cLy0mVkoLio |archive-url=https://ghostarchive.org/varchive/youtube/20211212/cLy0mVkoLio| archive-date=2021-12-12 |url-status=live|language=en |via=youtube |access-date=2019-10-23}}{{cbignore}}</ref> Ellsworth was raised by her father, Jim, a car mechanic and ] ] owner.<ref name="nytimes-2004-12-20-Markoff"/>


When she was eight years old, she disassembled her toys to learn how they worked. In response her father stopped buying toys, put an empty box at his work saying "bring your broken electronic gizmos", and every few weeks, gave them to her. She started making simple modifications to them.<ref name="Ellsworth-talks"/> She persuaded her father to let her use a ] computer which had been purchased for her brother.<ref name="nytimes-2004-12-20-Markoff"/> She taught herself to program by reading the manual. She earned spending money working for her father, pumping gas, cleaning wrenches, replacing oil filters, and other "mechanical things".<ref name="Ellsworth-talks"/>
Ellsworth then began designing computer circuits that mimicked the behavior of her first computer, the Commodore 64. In this way, in 2002, she designed the chip used in the ], a board which was co-designed and manufactured by Jens Schönfeld,<ref>{{cite web|url=http://www.c64upgra.de |title=C-One website |publisher=C64upgra.de |date= |accessdate=2011-03-23}}</ref> as an enhanced Commodore 64 which could also emulate other home computers of the early 1980s, including the ] and ]. She displayed the C-1 at a technology conference, and she and Schönfeld received enough business to sell a few hundred units. This also led to Ellsworth receiving a job offer from Mammoth Toys, a company which hired her to design the "computer in a chip" for the Commodore-emulating joystick. She began the project in June 2004, and had the project ready to ship by that Christmas. It sold over a half-million units, in the USA, Europe, and elsewhere.


In high school, she drove ] cars with her father and began designing new models in his workshop, eventually selling custom race cars. She ] of high school to continue the business.<ref name="nytimes-2004-12-20-Markoff"/>
Ellsworth is a pinball machine ] and owns over 90 full sized pinball arcade games.<ref> {{Dead link|date=March 2009}}. Ellsworth lists some of the pinball machines she owns (at 7:37).<!--truly dead link - not at Ramp.com, either.--></ref> She runs the business, Ricochet Pinball.


== Computer stores ==
On May 30, 2009, Ellsworth demonstrated her Home Chip Lab at ] Bay Area 2009.<ref>{{cite web|url=http://makerfaire.com/pub/e/2545 |title=Events filled with DIY projects, science, demos, recycling, entertainment, and fun |publisher=Makerfaire.com |date= |accessdate=2011-03-23}}</ref>
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|Description = Ellsworth, in front of one of her stores, ''Computers Made Easy'' in 2000<ref>{{cite web |title=COMPUTERS MADE EASY I INC |url=https://egov.sos.state.or.us/br/pkg_web_name_srch_inq.show_detl?p_be_rsn=67389&p_srce=BR_INQ&p_print=FALSE |website=Business Registry |publisher=] |access-date=28 September 2021}}</ref>
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In 1995, at the age of 21, Ellsworth tired of race track social atmosphere,<ref name="Ellsworth-talks"/> so she and a friend started a business assembling and selling computers based around the ] ]. When she and her partner had a disagreement,<ref name="nytimes-2004-12-20-Markoff"/> Ellsworth opened a separate business in competition. This became a chain of four stores, "Computers Made Easy", selling consumer electronics services and equipment in the ] towns of ],<ref>{{cite web | url=https://egov.sos.state.or.us/br/pkg_web_name_srch_inq.show_detl?p_be_rsn=849726&p_srce=BR_INQ&p_print=FALSE | title=Oregon Secretary of State }}</ref> ], and ].<ref name="Expo Jeri Ellsworth 1st"/><ref name="Statesman Journal 2006">
Ellsworth was named "MacGyver of the Day" on February 25, 2010 by ].<ref>{{cite web | last = Torrone | first = Phil | date = February 25, 2010 | url = http://lifehacker.com/5480199/macgyver-of-the-day-electronics-hacker-jeri-ellsworth | title = MacGyver of the Day: Electronics Hacker Jeri Ellsworth | publisher = Lifehacker.com}}</ref>
{{cite news|last=Monahan |first=Matt |date=January 25, 2005 |url=http://159.54.226.83/apps/pbcs.dll/article?AID=/20050125/BUSINESS/501250320 |archive-url=https://web.archive.org/web/20060221204134/http://159.54.226.83/apps/pbcs.dll/article?AID=%2F20050125%2FBUSINESS%2F501250320 |archive-date=February 21, 2006 |title=Joy of electronics sticks with woman, sparking invention |newspaper=] |access-date=2011-03-22 |url-status=dead }}
</ref>


When profit margins shrank,<ref name="entrepreneur-2017-Gaudiosi">
On December 3, 2010 she released information on how to build a TSA "naked" scanner using repurposed satellite antenna parts.<ref>{{cite web|url=http://hackaday.com/2010/12/03/make-your-own-tsa-naked-scanner/ |title=Make Your Own TSA "Naked" Scanner |publisher=Hack a Day |date=December 3, 2010 |accessdate=2011-03-23}}</ref>
{{cite web |last1=Gaudiosi |first1=John |title=How This Female Inventor Succeeded in Male-Dominated Industries |url=https://www.entrepreneur.com/article/292500 |website=Entrepreneur |access-date=29 September 2021 |date=April 10, 2017 |quote=Jeri Ellsworth is launching a consumer-friendly augmented reality platform, castAR, this fall.}}
</ref> she sold the chain in 2000 and moved to ] to attend ], studying circuit design. She left after a year because of a "cultural mismatch". Ellsworth said that questioning professors' answers was frowned upon.<ref name="nytimes-2004-12-20-Markoff"/>


== Hardware design ==
Ellsworth has published numerous technical articles online regarding subjects as diverse as homemade semiconductors (2009), homemade electroluminescent (EL) displays (2010), EL phosphor manufacture from common ingredients and ways to make transparent EL backplanes without using expensive indium-tin-oxide coated glass.<ref>{{cite web|url=http://blog.makezine.com/archive/2010/06/jeri-ellsworth-turns-an-lcd-into-el.html |title=Make: Online &#124; Jeri Ellsworth turns an LCD into an EL display |publisher=Blog.makezine.com |date=June 11, 2010 |accessdate=2011-03-23}}</ref>
]


In 2000, Ellsworth unveiled a prototype video expansion for the ] at a Commodore Exposition.<ref name="Expo Jeri Ellsworth 1st">{{cite web |author1=Raymond Day |title=Expo Jeri Ellsworth 1st |url=https://www.youtube.com/watch?v=nB3j911ldY0 |archive-url=https://ghostarchive.org/varchive/youtube/20211212/nB3j911ldY0| archive-date=2021-12-12 |url-status=live|website=] |language=en |date=April 10, 2014 |quote=This is old video when I was at a commodore Expo and first seen Jeri Ellsworth. This is where she burnt out an Altair and had an order come right to this place before the Expo started. She was 25 years old in this video, so in 1999.}}{{cbignore}}</ref> Ellsworth then began designing digital circuits that mimicked the behavior of the C64. In 2002, she designed the chip used in the ]<ref>{{cite web|url=http://www.c64upgra.de |title=C-One website |publisher=C64upgra.de |access-date=2011-03-23}}</ref> as an enhanced C64 which could also emulate other home computers of the early 1980s, including the ] and ]. She and a fellow developer displayed the C-One at a technology conference, which led to Mammoth Toys, a Division of NSI International, NSI Products (HK) Limited<ref>
Ellsworth was a keynote speaker at the Embedded Systems Conference on May 5, 2011.
*{{cite web|url=https://www.govinfo.gov/app/details/USCOURTS-ilnd-1_15-cv-06997|title=15-6997 - Mustafa v. NSI International, Inc. et al|website=govinfo.go}}
*{{cite web |last1=Spangenthal-Lee |first1=Jonah |title=In Other Neighborhoods. . . |url=https://www.thestranger.com/seattle/in-other-neighborhoods-/Content?oid=532250 |website=] |access-date=25 September 2021 |language=en |date=March 13, 2008 |quote=... a New York company called Mammoth Toys. Company president Frank Landi says Mammoth...}}
*{{cite web |title=MAMMOTH TOYS AND GAMES LLC :: New York (US) |url=https://opencorporates.com/companies/us_ny/5850181 |website=OpenCorporates |access-date=25 September 2021}}
*{{cite web |title=Mammoth Toys Div Of Nsi Products |url=https://www.importgenius.com/suppliers/mammoth-toys-div-of-nsi-products-h |website=ImportGenius |access-date=25 September 2021}}</ref> hiring her to design the "computer in a chip" for the ] C64-emulating joystick. She began the project in June 2004 and had the project ready to ship by that Christmas. It sold over a half-million units, in the US, Europe, and elsewhere. She did not receive payment, nor the commission she was owed,<ref name="Ellsworth-talks"/> but a story in the '']'' brought her to the public eye.<ref name="nytimes-2004-12-20-Markoff">{{Cite news|url=https://www.nytimes.com/2004/12/20/technology/a-toy-with-a-story.html|title=A Toy With a Story|last=Markoff|first=John|date=2004-12-20|work=The New York Times|access-date=2019-10-23|language=en-US|issn=0362-4331}}</ref><ref name="Ellsworth-talks"/>


On December 3, 2010 Ellsworth released information on how to build a TSA "naked" scanner using repurposed satellite antenna parts.<ref>{{cite web|url=http://hackaday.com/2010/12/03/make-your-own-tsa-naked-scanner/ |title=Make Your Own TSA "Naked" Scanner |publisher=Hackaday |date=December 3, 2010 |access-date=2011-03-23}}</ref> Ellsworth has worked on numerous subjects as diverse as homemade semiconductors (2009),<ref name="Maker Faire Bay Area 2009"/> homemade electroluminescent (EL) displays (2010),<ref name="lcd-into-el"/> EL phosphor manufacture from common ingredients and ways to make transparent EL backplanes and phosphor without using expensive indium-tin-oxide coated glass and hard-to-obtain chemicals.<ref name="lcd-into-el">{{cite web |url=http://blog.makezine.com/archive/2010/06/jeri-ellsworth-turns-an-lcd-into-el.html |title=Jeri Ellsworth turns an LCD into an EL display |publisher=blog.makezine.com |date=June 11, 2010 |access-date=2011-03-23 |archive-url=https://web.archive.org/web/20110426032250/http://blog.makezine.com/archive/2010/06/jeri-ellsworth-turns-an-lcd-into-el.html |archive-date=April 26, 2011 |url-status=dead }}</ref>
In early 2012 Ellsworth was hired by ] (along with several other notable hardware hackers) to work on gaming hardware.<ref>{{cite web | url = http://www.valvetime.net/threads/im-working-at-valve-on-nextgen-gaming-hardware-jeri-ellsworth.187331/ | title = "I'm working at Valve on nextgen gaming hardware" - Jeri Ellsworth | publisher = valvetime.net }}</ref>


Ellsworth was named "MacGyver of the Day" on February 25, 2010 by '']''.<ref name="Lifehacker-MacGyver-Torrone">{{cite web | last = Torrone | first = Phil | date = February 25, 2010 | url = http://lifehacker.com/5480199/macgyver-of-the-day-electronics-hacker-jeri-ellsworth | title = MacGyver of the Day: Electronics Hacker Jeri Ellsworth | publisher = Lifehacker.com}}</ref>
== Presentations ==

* {{cite web|title=Demo Coding with FPGAs: We Don't Need No Stinking CPUs|work= ] 5|date= April 4, 2008|url=http://blip.tv/file/821819}}
Ellsworth is a freelance ] and ] designer.<ref name="Lifehacker-MacGyver-Torrone"/><ref name="Embedded-2011-Ganssle">{{cite web |last1=Ganssle |first1=Jack |title=Fun at the ESC |url=https://www.embedded.com/fun-at-the-esc/ |website=Embedded.com |date=9 May 2011 |quote=Jeri Ellsworth gave Thursday’s keynote. A high school dropout, she’s now a freelance ASIC designer. Jeri has some quite innovative YouTube videos, and her life story is truly that of the up-from-nothing American entrepreneur.}}</ref>

==Augmented reality==
In early 2012, Ellsworth and other hardware hackers were hired by ] to work on gaming hardware.<ref>{{cite web | url = http://www.valvetime.net/threads/im-working-at-valve-on-nextgen-gaming-hardware-jeri-ellsworth.187331/ | title = "I'm working at Valve on nextgen gaming hardware" – Jeri Ellsworth | date = March 10, 2020 | publisher = valvetime.net }}</ref> Along with several other Valve employees, Ellsworth was terminated the following year.<ref>{{cite web|url=https://twitter.com/jeriellsworth/status/301521067816669184|title=Jeri Ellsworth on Twitter: "Yup. Got fired today. Time for new exciting projects."|publisher=Twitter.com|access-date=6 October 2014}}</ref><ref>{{cite web|url=http://www.gamasutra.com/view/news/186592/Several_out_of_work_as_Valve_makes_large_decisions_about_its_future.php|title=Gamasutra: Several out of work as Valve makes 'large decisions' about its future|date=February 13, 2013|publisher=Gamasutra.com|access-date=6 October 2014}}</ref><ref>{{cite web|url=https://www.engadget.com/2013/02/13/valve-gabe-newell-layoffs-statement/|title=Engadget: Valve's Gabe Newell on reported layoffs|author=Ben Gilbert|work=Engadget|access-date=6 October 2014}}</ref>

On May 18, 2013, Ellsworth announced that she had developed an ] development system named ] with fellow ex-Valve engineer Rick Johnson,<ref>{{citation | url = https://www.theverge.com/2013/5/18/4343382/technical-illusions-valve-augmented-reality-glasses-jeri-ellsworth-rick-johnson | title = How two Valve engineers walked away with the company's augmented reality glasses | date = May 18, 2013 }}</ref> with the blessing of ]'s ],<ref>{{citation | url = https://www.engadget.com/2013/05/18/cast-ar-hands-on-with-jeri-ellsworth-at-maker-faire-2013 | title = cast AR hands-on with Jeri Ellsworth at Maker Faire 2013|publisher=Engadget.com|access-date=6 October 2014}}</ref> and would be funding it via ] later in the year. Her start-up company, ], started developing castAR.<ref>{{cite web|url =http://www.technicalillusions.com | title = Technical Illusions|publisher=Technicalillusions.com|access-date=6 October 2014}}</ref>

Ellsworth later revealed she had been secretly working to make ] have "true VR and true AR" in addition to the previously announced projected AR capabilities.<ref>{{cite web|url=https://www.youtube.com/watch?v=cc2NQVQK69A| archive-url=https://web.archive.org/web/20131014163717/http://www.youtube.com/watch?v=cc2NQVQK69A| archive-date=2013-10-14 | url-status=dead|title=CastAR VR / AR System – The 18 Month Story|work=YouTube|access-date=6 October 2014}}</ref> The castAR Kickstarter,<ref>{{cite web|url=http://www.kickstarter.com/projects/technicalillusions/castar-the-most-versatile-ar-and-vr-system|title=castAR: the most versatile AR & VR system|work=Kickstarter|access-date=6 October 2014}}</ref> launched on October 14, 2013, reached its goal of $400,000 in 56 hours and finished with $1.05&nbsp;million, 263% of the original goal.<ref>{{cite web|url=http://www.kicktraq.com/projects/technicalillusions/castar-the-most-versatile-ar-and-vr-system|title=castAR: the most versatile AR & VR system|publisher=Kicktraq.com|access-date=6 October 2014}}</ref> The project didn't deliver the devices and paid back the funds to backers before shutting down the company in 2017.<ref>{{Cite web|url=https://www.theverge.com/2017/6/27/15879700/castar-augmented-reality-glasses-shutdown-layoffs-report|title=Ambitious augmented reality startup CastAR reportedly shuts down|last=Robertson|first=Adi|date=2017-06-27|website=The Verge|language=en|access-date=2019-09-25}}</ref>

In September 2019, Ellsworth initiated a Kickstarter for a new device based on the same principles of the castAR, called Tilt Five.<ref>{{Cite web|url=https://www.theverge.com/2019/9/24/20881355/tilt-five-castar-augmented-reality-glasses-jeri-ellsworth-kickstarter|title=Jeri Ellsworth's unique AR glasses are back from the dead|last=Hollister|first=Sean|date=2019-09-24|website=The Verge|language=en|access-date=2019-09-25}}</ref> This Kickstarter exceeded the previous one, hitting its initial target of $450,000 in 17 hours, and eventually gaining $1,767,301. Initially scheduled to deliver Kickstarter product by June 2020, the manufacturing was delayed by the Covid pandemic, but has continued to sign gaming contracts.<ref>Liam Dawe. Gaming on Linux. June 24, 2021. https://www.gamingonlinux.com/2021/06/tilt-five-an-upcoming-tabletop-holographic-gaming-system-developed-with-linux</ref>

==Public speaking and webcasts==
Ellsworth was a keynote speaker at the Embedded Systems Conference on May 5, 2011.<ref name="Ellsworth-talks"/>

From December 2008 until March 2009, Ellsworth hosted a weekly ], ''Fatman and Circuit Girl'', together with musician ].<ref name="Webcast1">{{cite web|url=http://makezine.com/2009/04/28/latest-fatman-and-circuit-girl-vids/|title=Latest Fatman and Circuit Girl vids|last1=Branwyn|first1=Gareth|author-link1=Gareth Branwyn|date=28 April 2009|publisher=]|access-date=12 June 2014}}</ref><ref name="Webcast2">{{cite web|url=http://www.nycresistor.com/2009/06/25/fatman-and-circuit-girl-jeri-ellesworth-rollerderby-superstar-cover-noahs-ar-rig-at-notacon/|title=Fatman and Circuit Girl (Jeri Ellsworth – Rollerderby Superstar) Cover Noah's AR Rig at Notacon|last1=Joyce|first1=Matt|date=25 June 2009|publisher=]|access-date=12 June 2014}}</ref> On May 30, 2009, Ellsworth demonstrated her Home Chip Lab at ] Bay Area 2009.<ref name="Maker Faire Bay Area 2009">{{cite web|url=http://makerfaire.com/pub/e/2545 |title=Events filled with DIY projects, science, demos, recycling, entertainment, and fun |publisher=Maker Faire |access-date=2011-03-23 |url-status=dead |archive-url=https://web.archive.org/web/20101218162012/http://makerfaire.com/pub/e/2545 |archive-date=2010-12-18 }}</ref>

==Personal life==
Ellsworth is a ] ] and owns over 80 pinball machines.<ref name="engadget.com"/> In 2016, she became a licensed ] operator, holding an Extra Class license<ref>{{cite web|url=http://wireless2.fcc.gov/UlsApp/UlsSearch/license.jsp?licKey=3859543|title=FCC ULS Search|access-date=19 November 2016}}</ref> with callsign AI6TK.<ref>{{cite web|url= https://www.qrz.com/db/AI6TK |title=QRZ.com|access-date=17 October 2022}}</ref>


==References== ==References==
{{Reflist}} {{Reflist}}

===Bibliography===
* {{cite book |last1=Osborn |first1=Steven |title=Makers at Work: Folks Reinventing the World, One Object Or Idea at a Time |date=2013 |location=Berkeley, CA |isbn=978-1-4302-5993-0 |chapter=Jeri Ellsworth, Founder, Technical Illusions |oclc=854612458}}


==External links== ==External links==
{{commons category|Jeri Ellsworth}} {{Commons category|Jeri Ellsworth}}

*{{official website|http://www.jeriellsworth.com}}
*{{official website}}
*{{twitter|jeriellsworth|Jeri Ellsworth}}
*
*{{youtube channel|jeriellsworth|Jeri Ellsworth}}

*{{youtube channel|JeriEllsworthJabber|Jeri Ellsworth}} (Less formal companion channel.)
{{Authority control}}
*{{vimeo user|jeri|Jeri Ellsworth}}
*{{flickr|jeriellsworth|Jeri Ellsworth}}
*{{ustream|5194965|Jeri Ellsworth at the March 2010 Portland Linux General Meeting}}
*Stanford lecture, May 18, 2005 in


{{Persondata <!-- Metadata: see ]. -->
| NAME = Ellsworth, Jeri
| ALTERNATIVE NAMES =
| SHORT DESCRIPTION =
| DATE OF BIRTH = August 14, 1974
| PLACE OF BIRTH = Yamhill, Oregon
| DATE OF DEATH =
| PLACE OF DEATH =
}}
{{DEFAULTSORT:Ellsworth, Jeri}} {{DEFAULTSORT:Ellsworth, Jeri}}
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Latest revision as of 00:02, 5 October 2024

American entrepreneur and computer chip designer

Jeri Ellsworth
Jeri Ellsworth, 2009Ellsworth at California Extreme (Classic Arcade Games Show), 2009
Born (1974-08-14) August 14, 1974 (age 50)
Georgia, United States
OccupationEntrepreneur
Integrated circuit designer
EmployerTilt Five
Websitehttps://www.jeriellsworth.com/ Edit this on Wikidata

Jeri Janet Ellsworth (born August 14, 1974) is an American entrepreneur, computer chip designer and inventor. She gained fame in 2004 for creating a complete Commodore 64 emulator system on a chip housed within a joystick, called Commodore 30-in-1 Direct to TV. It runs 30 video games from the 1980s, and at peak, sold over 70,000 units in a single day via the QVC shopping channel.

Ellsworth was hired by Valve Corporation to develop augmented reality hardware, but was terminated in 2013. She co-founded castAR to continue the work—with permission—but the company shut down on June 26, 2017 without completing development. She started another company, Tilt Five, to create AR hardware based on the same principles.

Ellsworth has publicly talked about various homebrew projects, such as how to manufacture semiconductor chips at home.

Early life

Ellsworth was born in Georgia and grew up in the towns of Dallas, Oregon and Yamhill, Oregon. Her mother died when she was one. Ellsworth was raised by her father, Jim, a car mechanic and Mobil service station owner.

When she was eight years old, she disassembled her toys to learn how they worked. In response her father stopped buying toys, put an empty box at his work saying "bring your broken electronic gizmos", and every few weeks, gave them to her. She started making simple modifications to them. She persuaded her father to let her use a Commodore 64 computer which had been purchased for her brother. She taught herself to program by reading the manual. She earned spending money working for her father, pumping gas, cleaning wrenches, replacing oil filters, and other "mechanical things".

In high school, she drove dirt track racing cars with her father and began designing new models in his workshop, eventually selling custom race cars. She dropped out of high school to continue the business.

Computer stores

Ellsworth, in front of one of her stores, Computers Made Easy in 2000 Ellsworth, in front of one of her stores, Computers Made Easy in 2000

In 1995, at the age of 21, Ellsworth tired of race track social atmosphere, so she and a friend started a business assembling and selling computers based around the Intel 486 microprocessor. When she and her partner had a disagreement, Ellsworth opened a separate business in competition. This became a chain of four stores, "Computers Made Easy", selling consumer electronics services and equipment in the Willamette Valley towns of Canby, Monmouth, and Albany, Oregon.

When profit margins shrank, she sold the chain in 2000 and moved to Walla Walla, Washington to attend Walla Walla College, studying circuit design. She left after a year because of a "cultural mismatch". Ellsworth said that questioning professors' answers was frowned upon.

Hardware design

Ellsworth at Bay Area Maker Faire 2009

In 2000, Ellsworth unveiled a prototype video expansion for the Commodore 64 at a Commodore Exposition. Ellsworth then began designing digital circuits that mimicked the behavior of the C64. In 2002, she designed the chip used in the C-One as an enhanced C64 which could also emulate other home computers of the early 1980s, including the VIC-20 and ZX81. She and a fellow developer displayed the C-One at a technology conference, which led to Mammoth Toys, a Division of NSI International, NSI Products (HK) Limited hiring her to design the "computer in a chip" for the C64 Direct-to-TV C64-emulating joystick. She began the project in June 2004 and had the project ready to ship by that Christmas. It sold over a half-million units, in the US, Europe, and elsewhere. She did not receive payment, nor the commission she was owed, but a story in the New York Times brought her to the public eye.

On December 3, 2010 Ellsworth released information on how to build a TSA "naked" scanner using repurposed satellite antenna parts. Ellsworth has worked on numerous subjects as diverse as homemade semiconductors (2009), homemade electroluminescent (EL) displays (2010), EL phosphor manufacture from common ingredients and ways to make transparent EL backplanes and phosphor without using expensive indium-tin-oxide coated glass and hard-to-obtain chemicals.

Ellsworth was named "MacGyver of the Day" on February 25, 2010 by Lifehacker.

Ellsworth is a freelance ASIC and FPGA designer.

Augmented reality

In early 2012, Ellsworth and other hardware hackers were hired by Valve to work on gaming hardware. Along with several other Valve employees, Ellsworth was terminated the following year.

On May 18, 2013, Ellsworth announced that she had developed an augmented reality development system named castAR with fellow ex-Valve engineer Rick Johnson, with the blessing of Valve's Gabe Newell, and would be funding it via Kickstarter later in the year. Her start-up company, Technical Illusions, started developing castAR.

Ellsworth later revealed she had been secretly working to make castAR have "true VR and true AR" in addition to the previously announced projected AR capabilities. The castAR Kickstarter, launched on October 14, 2013, reached its goal of $400,000 in 56 hours and finished with $1.05 million, 263% of the original goal. The project didn't deliver the devices and paid back the funds to backers before shutting down the company in 2017.

In September 2019, Ellsworth initiated a Kickstarter for a new device based on the same principles of the castAR, called Tilt Five. This Kickstarter exceeded the previous one, hitting its initial target of $450,000 in 17 hours, and eventually gaining $1,767,301. Initially scheduled to deliver Kickstarter product by June 2020, the manufacturing was delayed by the Covid pandemic, but has continued to sign gaming contracts.

Public speaking and webcasts

Ellsworth was a keynote speaker at the Embedded Systems Conference on May 5, 2011.

From December 2008 until March 2009, Ellsworth hosted a weekly webcast, Fatman and Circuit Girl, together with musician George Sanger. On May 30, 2009, Ellsworth demonstrated her Home Chip Lab at Maker Faire Bay Area 2009.

Personal life

Ellsworth is a pinball aficionado and owns over 80 pinball machines. In 2016, she became a licensed amateur radio operator, holding an Extra Class license with callsign AI6TK.

References

  1. "Home". caextreme.org.
  2. ^ Lee, Nicole (October 17, 2014). "castAR bets big on its augmented reality hardware with move to Silicon Valley". Engadget. Retrieved February 7, 2015.
  3. "Keynote Addresses | ESC Silicon Valley".
  4. ^ Markoff, John (December 20, 2004). "A Toy With a Story". The New York Times. ISSN 0362-4331. Retrieved October 23, 2019.
  5. Benchoff, Brian (June 27, 2017). "CastAR Shuts Doors". Hackaday.
  6. "#394 – Jeri Ellsworth and the demise of CastAR". The Amp Hour Electronics Podcast. May 29, 2018. Retrieved December 27, 2018.
  7. "#390 – An Interview with Sam Zeloof". The Amp Hour Electronics Podcast (Podcast). April 30, 2018. Retrieved February 17, 2021.
  8. ^ Fuller, Brian (May 6, 2011), Jeri Ellsworth, self-taught engineer, talks about her career, archived from the original on December 12, 2021, retrieved October 23, 2019 – via youtube, Jeri Ellsworth, who keynoted at ESC Silicon Valley 2011, talks about her remarkable life and career and innovations with EE Times
  9. "COMPUTERS MADE EASY I INC". Business Registry. Oregon Secretary of State. Retrieved September 28, 2021.
  10. "Oregon Secretary of State".
  11. ^ Raymond Day (April 10, 2014). "Expo Jeri Ellsworth 1st". YouTube. Archived from the original on December 12, 2021. This is old video when I was at a commodore Expo and first seen Jeri Ellsworth. This is where she burnt out an Altair and had an order come right to this place before the Expo started. She was 25 years old in this video, so in 1999.
  12. Monahan, Matt (January 25, 2005). "Joy of electronics sticks with woman, sparking invention". Statesman Journal. Archived from the original on February 21, 2006. Retrieved March 22, 2011.
  13. Gaudiosi, John (April 10, 2017). "How This Female Inventor Succeeded in Male-Dominated Industries". Entrepreneur. Retrieved September 29, 2021. Jeri Ellsworth is launching a consumer-friendly augmented reality platform, castAR, this fall.
  14. "C-One website". C64upgra.de. Retrieved March 23, 2011.
  16. "Make Your Own TSA "Naked" Scanner". Hackaday. December 3, 2010. Retrieved March 23, 2011.
  17. ^ "Events filled with DIY projects, science, demos, recycling, entertainment, and fun". Maker Faire. Archived from the original on December 18, 2010. Retrieved March 23, 2011.
  18. ^ "Jeri Ellsworth turns an LCD into an EL display". blog.makezine.com. June 11, 2010. Archived from the original on April 26, 2011. Retrieved March 23, 2011.
  19. ^ Torrone, Phil (February 25, 2010). "MacGyver of the Day: Electronics Hacker Jeri Ellsworth". Lifehacker.com.
  20. Ganssle, Jack (May 9, 2011). "Fun at the ESC". Embedded.com. Jeri Ellsworth gave Thursday's keynote. A high school dropout, she's now a freelance ASIC designer. Jeri has some quite innovative YouTube videos, and her life story is truly that of the up-from-nothing American entrepreneur.
  21. ""I'm working at Valve on nextgen gaming hardware" – Jeri Ellsworth". valvetime.net. March 10, 2020.
  22. "Jeri Ellsworth on Twitter: "Yup. Got fired today. Time for new exciting projects."". Twitter.com. Retrieved October 6, 2014.
  23. "Gamasutra: Several out of work as Valve makes 'large decisions' about its future". Gamasutra.com. February 13, 2013. Retrieved October 6, 2014.
  24. Ben Gilbert. "Engadget: Valve's Gabe Newell on reported layoffs". Engadget. Retrieved October 6, 2014.
  25. How two Valve engineers walked away with the company's augmented reality glasses, May 18, 2013
  26. cast AR hands-on with Jeri Ellsworth at Maker Faire 2013, Engadget.com, retrieved October 6, 2014
  27. "Technical Illusions". Technicalillusions.com. Retrieved October 6, 2014.
  28. "CastAR VR / AR System – The 18 Month Story". YouTube. Archived from the original on October 14, 2013. Retrieved October 6, 2014.
  29. "castAR: the most versatile AR & VR system". Kickstarter. Retrieved October 6, 2014.
  30. "castAR: the most versatile AR & VR system". Kicktraq.com. Retrieved October 6, 2014.
  31. Robertson, Adi (June 27, 2017). "Ambitious augmented reality startup CastAR reportedly shuts down". The Verge. Retrieved September 25, 2019.
  32. Hollister, Sean (September 24, 2019). "Jeri Ellsworth's unique AR glasses are back from the dead". The Verge. Retrieved September 25, 2019.
  33. Liam Dawe. Gaming on Linux. June 24, 2021. https://www.gamingonlinux.com/2021/06/tilt-five-an-upcoming-tabletop-holographic-gaming-system-developed-with-linux
  34. Branwyn, Gareth (April 28, 2009). "Latest Fatman and Circuit Girl vids". Make. Retrieved June 12, 2014.
  35. Joyce, Matt (June 25, 2009). "Fatman and Circuit Girl (Jeri Ellsworth – Rollerderby Superstar) Cover Noah's AR Rig at Notacon". NYC Resistor. Retrieved June 12, 2014.
  36. "FCC ULS Search". Retrieved November 19, 2016.
  37. "QRZ.com". Retrieved October 17, 2022.

Bibliography

  • Osborn, Steven (2013). "Jeri Ellsworth, Founder, Technical Illusions". Makers at Work: Folks Reinventing the World, One Object Or Idea at a Time. Berkeley, CA. ISBN 978-1-4302-5993-0. OCLC 854612458.{{cite book}}: CS1 maint: location missing publisher (link)

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