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During the COVID-19 pandemic, with a lot of spare time on hand, I took up the hobby of manual typewriter restoration. It’s really not a difficult task: typewriters are generally very well built and aside from being dusty and gummed up, most manual typewriters for sale today are still in perfect working order, despite being over half a century old. How It’s Done When restoring typewriters, the first thing to do is to find out your typewriter model. If you are lucky enough, it is written on the typewriter itself, and if not, then you can scroll through the Typewriter…
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Disclaimer The methods described in this post worked for me. There are many factors that affect whether or not any of this may work for you, but two big ones are weather and soil conditions. Here in Palo Alto, we have clay soil and the weather is hot and dry, at least in the summer. The molds that I’m making are one-part molds, which tend to be simpler, but these methods probably apply to two-part molds as well. Also, I am casting with zinc, a low-temperature, runny metal that takes well to casting. Also, a note about safety: although zinc…
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I realize that the field of hobbyist 3D printing is rapidly advancing and that this post may become obsolete very soon. How I Got It I got this printer used for $30 on Nextdoor in 2020. It was a Wanhao Duplicator i3 v2 that came with frame braces, a glass bed, and a Cobra Cooler fan duct. At the time I knew almost nothing about the details of 3D printing, only the theory, which can be summarized in the sentence “hot plastic extruded in layers to form an object”. Upgrades After seeing the first layer fail to go down many…
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This was my science project for the Synopsys Science fair which I participated in in 2023. Abstract 1.2 billion people worldwide need to boil water to make it drinkable, even in places considered developed. This is because boiling is simple, versatile, and accessible. While water is commonly boiled, it must take in lots of energy to reach its boiling point. After this, the scalding-hot water must then release that energy and cool for between 45 minutes several hours before it is drinkable. The two opposite steps just outlined lead to a solution: by using a heat exchanger, the boiled water…
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