Alex Raichev

Knife Holders

On 2021-08-18, New Zealand re-entered COVID-19 Alert Level 4, aka lockdown. One upside of lockdown is more time for arts and crafts.

Challenge 1: Construct with (pencil and) straightedge and compass only a regular pentagon. Solution here.

Challenge 2: Construct with compass only (the vertices of) a regular pentagon. Solution here.

Challenge 3: Construct with compass and straightedge only a regular heptagon (7 sides). ­čą║ Anti-solution 3 here.

Trivia: Neodymium magnets were invented in what decade of the 20th century? Answer here.

Author: Alex Raichev
Date: 2021-08-28
Tags: DIY
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Corriboard Bicycle Basket

Corriboard or corrugated plastic, also known under the tradenames of Cartonplast®, Polyflute, Coroplast, FlutePlast, IntePro, Proplex, Correx, Twinplast, Corriflute or Corflute, is a perfect material for bicycle baskets, in my opinion. It's light, waterproof, durable, flexible, and often forageable from old signs around town.

By popular request, here are instructions on how to make the basket i like to put on my bikes. Adjust as you see fit.

I like to cut extra holes in the basket for a bungee net. Got this corriboard from an old euthanasia campaign sign:

Corner detail:

Update 2021-08-20: I think the 100mm x 40mm corner pieces are over-built and now recommend instead joining pairs of basket faces directly with a single cable tie, halving the total number of cable ties needed to 12.

Author: Alex Raichev
Date: 2021-02-12
Tags: bicycle, DIY
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Fruit Picker

Description and build instructions here.

Author: Alex Raichev
Date: 2017-02-25
Tags: DIY
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The Walk Radiant Dryer

Solar food dehydration without extra gadgets, even in humid climates.

Description and build instructions for the Walk Radiant Dryer here.

Author: Alex Raichev
Date: 2017-02-05
Tags: DIY
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Bicycle Repair Kit

Author: Alex Raichev
Date: 2014-12-07
Tags: bicycle, DIY
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Why no comments? I used to do public comments but found that moderating and maintaining them took too much time in front of the computer, time better spent playing outdoors. So these days I only do private comments, that is, you can email me comments regarding a post by clicking the 'Comment' link at the bottom of the post.