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"LED Teaching Aid" Prototype
This prototype used a single probe and used a red/green LED to indicate
right or wrong choices.
Learning cards were placed in the simple card-holding frame.
If the learner made a wrong choice, the LED glowed red.
If the learner made a correct choice, the LED glowed green. I exhibited this teaching aid at the 1973
"Invention Convention" at
the Salt Palace in Salt Lake City. Visitors to my booth would try out the
teaching aid. I gave them a handout describing the teaching aid. I also tried to
get them to fill out a questionnaire, so I could evaluate the
public's impression of my invention. After the convention, I tallied the questionnaire
data (PDF
1.16 MB)
as part of my assessment of the market potential for this invention. Most people
(57%)would consider buying it or recommending (79%) that their organization buy
it, but they mostly (49%) chose the lowest purchase price ($5 - $10) option. I
can't remember why I didn't pursue the marketing of this invention, but the
market survey results were not especially encouraging. They were about evenly
divided on whether they preferred to make or buy the learning cards.
(see original
disclosure document) (PDF 0.12 MB)
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