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Offgrid Pocket Calculator  RSS feed

 
steward
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No electrical power required, no batteries... a mechanical calculator. Really cool, but not cheap ($1k on ebay).

 
gardener
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At a fruit market in Chinatown, there is a lady whose hand speed is faster than Bruce Lee. Her abacus skills put most modern inventions to shame. Might not work so well as a mortgage calculator.
 
Trust God, but always tether your camel... to this tiny ad.
177 hours of video: the 2017 Permaculture Design Course and Appropriate Technology Course
https://permies.com/wiki/65386/hours-video-Permaculture-Design-Technology
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