visitors this year: 358 This insanely bright headlamp / flashlight is excellent for hobbies, camping and cycling. Here are a few instructions to use it well This flashlight (aka torch) requires 2 x 18650...
visitors this year: 1,631 I discover my bicycle headlamp wasn’t working because some 18650 batteries have a button top. Oh my, that was embarrassing to admit The 18650 ‘battery’, like many batteries, is named...
Roger Frost has been writing about technology since 1988 and this web includes articles; radio interviews with scientists and tutorials to use technology at home and the classroom.
rogerfrost.com is a compendium of ideas for using technology with sciencey questions in mind. Started in 1995 to offer ideas to school science teachers, Roger Frost expanded the coverage to home automation, lifestyle topics, handy gadgets and smarthome sensors to measure, or understand, what’s going on around him.
I’d encourage use of the search box and keywords to find content. We’re totally spam and advert free. Please enjoy and share this content.
To say hi – there’s a reply button on each page that goes only to me in Cambridge, UK. Or send a message on this page.
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