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I like to create new things ranging from electronics to sewing.
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I simply cannot sleep with a fan constantly blowing on me.
My husband can not sleep without a fan on him.
Initially, I thought we'd never be able to find a happy medium, since ceiling fans are designed to be either on or off all night. I realized that if I could find a way to turn our fan off after five minutes and then back on after another 20 minutes, we’d both be able to sleep well. So, I built an adjustable, intermittent fan controller with roughly $30 worth of electronics and two Python scripts.
A multiplication version of 21 / BlackJack. The game is designed to help the user increase their ability to do mental math.
All cards are multiplied together. There is one addition that you can place anywhere between the cards.
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Game invented, designed and built by Evelyn J. Boettcher
- See Gem City Sewn on Instructables.
Wavelength tunable filter device for fiber optic systems E Boettcher, ST Vohra, PJ Matthews, PD Biernacki US Patent 6,738,536
Tunable Dispersion Compensating Bandwidth Device for Fiber Optics System, Evelyn Boettcher, Sandeep T. Vohra, Gregg Johnson, US Patent # 6,944,372
Method of enhancing waveguide photosensitivity and waveguide having enhanced photosensitivity, E Boettcher, S Vohra US Patent App. 09/938,543