{"id":60428,"date":"2025-06-24T17:15:43","date_gmt":"2025-06-24T07:15:43","guid":{"rendered":"https:\/\/www.tomgrimshaw.com\/tomsblog\/?p=60428"},"modified":"2025-06-24T17:15:43","modified_gmt":"2025-06-24T07:15:43","slug":"hand-powered-flashlight","status":"publish","type":"post","link":"https:\/\/www.tomgrimshaw.com\/tomsblog\/?p=60428","title":{"rendered":"Hand Powered Flashlight"},"content":{"rendered":"

\"Hand<\/p>\n

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At just 14 years old, Ann Makosinski harnessed the warmth of her own hand to create a flashlight that needs no batteries.<\/p>\n<\/div>\n
Her inspiration came from a friend in the Philippines who told her she couldn’t study at night and was failing in school because her family had no electricity for light.<\/p>\n

<\/span><\/span><\/div>\n<\/div>\n

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Ann wanted to find a way to help. She knew she could capture energy from many sources, including the heat from a human body.<\/p>\n<\/div>\n<\/div>\n
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She looked into Peltier tiles, which produce an electric charge when one side of the tile is heated and the other is cooled.<\/p>\n<\/div>\n<\/div>\n
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Ann realized that the heat from a person’s hand on one side, and the ambient air cooling the other, could generate enough power for an LED light.<\/p>\n<\/div>\n<\/div>\n
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Using this principle, she designed the Hollow Flashlight. The design allows air to flow through the device, keeping the outside cool while the inside is warmed by the user’s hand.<\/p>\n<\/div>\n<\/div>\n
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In 2013, at age 15, her invention won her top prize for her age group at the Google Science Fair.<\/p>\n<\/div>\n<\/div>\n
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Her simple, yet brilliant, device showed a new path for sustainable, off-grid energy solutions.<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

At just 14 years old, Ann Makosinski harnessed the warmth of her own hand to create a flashlight that needs no batteries. Her inspiration came from a friend in the Philippines who told her she couldn’t study at night and was failing in school because her family had no electricity for light. Ann wanted to … <\/p>\n

Continue reading “Hand Powered Flashlight”<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5],"tags":[],"class_list":["post-60428","post","type-post","status-publish","format-standard","hentry","category-general-interest"],"_links":{"self":[{"href":"https:\/\/www.tomgrimshaw.com\/tomsblog\/index.php?rest_route=\/wp\/v2\/posts\/60428","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.tomgrimshaw.com\/tomsblog\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.tomgrimshaw.com\/tomsblog\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.tomgrimshaw.com\/tomsblog\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.tomgrimshaw.com\/tomsblog\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=60428"}],"version-history":[{"count":1,"href":"https:\/\/www.tomgrimshaw.com\/tomsblog\/index.php?rest_route=\/wp\/v2\/posts\/60428\/revisions"}],"predecessor-version":[{"id":60430,"href":"https:\/\/www.tomgrimshaw.com\/tomsblog\/index.php?rest_route=\/wp\/v2\/posts\/60428\/revisions\/60430"}],"wp:attachment":[{"href":"https:\/\/www.tomgrimshaw.com\/tomsblog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=60428"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.tomgrimshaw.com\/tomsblog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=60428"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.tomgrimshaw.com\/tomsblog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=60428"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}