Thermoelectric Fan Harvests Wood Stove Heat Junkyard Style | Hackaday

https://hackaday.com/2018/04/27/thermoelectric-fan-harvests-wood-stove-heat-junkyard-style/

…something like this heat-powered stove-top fan can come in handy. Such fans, which use Peltier devices to power a small electric motor, are readily available commercially. [bongodrummer] thought that sounded like no fun, though, and created his own mostly from junk. The Peltier module was salvaged from an old travel fridge and mounted to a heat sink from a computer to harvest heat from the stove. The other side of the Peltier needs to have a heat sink to keep it cooler than the hot side, and [bongodrummer] chose an unconventional bit of salvage for the job — the cylinder of a chainsaw engine…

Making High Quality Copies Of Existing Parts Using A Silicone Mold | Hackaday

https://hackaday.com/2021/08/26/making-high-quality-copies-of-existing-parts-using-a-silicone-mold/

One side of the silicon mold is cast first, and after curing it is placed back in the mold box with the master part to allow casting the other side of the mold. At this point [Eric] super glues the sprue-former and vent rods to the master parts before molding the second side. A release agent consisting of petroleum jelly and naphtha is added wherever the two sides of the mold will touch, to prevent them from sticking together...

Singer sewing machines: ageing starlet (or outright scam?) | HobbyCouture

Comment by tonytran2015: This should be a good case study on the benefit of Merger and Acquisition.

https://hobbycouture.com/en/a/singer-sewing-machines-ageing-starlet-or-outright-scam

Discover how history turned this market leader into a has-been.

… it shows why it’s essential to choose the brand of your sewing machine carefully …

… It shows what is sometimes hidden behind a big name, and why the choice of brand should be a primary consideration, not an afterthought.

Heating A Home With Sunlight… And Water | Hackaday

https://hackaday.com/2021/04/22/heating-a-home-with-sunlight-and-water/

The sun is a tremendous source of energy, and while photovoltaic panels are an easy way to harvest some of that energy especially now that prices for them are incredibly low, there are plenty of other ways to tap into that free energy as well. [Engelbert] was looking for alternative ways to heat his house since traditional methods were prohibitively expensive, and ended up building a heat exchanger using solar-heated water to cover his home heating needs. (Google Translate from Dutch)

The system uses several large roof-mounted hot water heating panels. The heat captured by them is then pumped …

Troubleshooting a Janome Sewing Machine (Fix & Repair Guide)

https://sewingiscool.com/troubleshooting-a-janome-sewing-machine-fix/

Machines break down. It doesn’t matter who makes them. No matter how good of quality the machine is. Eventually, it wears down and stops working. When that happens it pays to be able to do the repairs yourself and save on repair bills…

Native Wisdom: Growing Techniques of Indigenous Peoples – KidsGardening

https://crookedbearcreekorganicherbs.com/2020/10/02/native-wisdom-growing-techniques-of-indigenous-peoples-kidsgardening/

KidsGardening is sharing some of what we’ve learned about the wisdom and sustainability of Native American growing techniques.

Source: Native Wisdom: Growing Techniques of Indigenous Peoples – KidsGardening

Asteroid 2020SW explodes 16k miles above earth September 24, 2020?, Discovered Sept 18, Small garage size, Trajectory and composition could damage population area

Asteroid 2020SW explodes 16k miles above earth September 24, 2020?, Discovered Sept 18, Small garage size, Trajectory and composition could damage population area

Asteroid 2020SW explodes 16k miles above earth September 24, 2020?, Discovered Sept 18, Small garage size, Trajectory and composition could damage population area

Asteroid 2020SW, discovered September 18, 2020 by the Center for Near Earth Object Studies of the Jet Propulsion Laboratory, is predicted to enter the earth’s atmosphere at a height of approx. 16,000 miles on September 24, 2020.

The object is approx. the size of a small garage.

https://cneos.jpl.nasa.gov/ca/

How microwave oven is made – manufacture, making, used, parts, components, structure, product, Design

Comment by tonytran2015: Some basic knowledge is required for modern living.

http://www.madehow.com/Volume-1/Microwave-Oven.html

…The microwaves are funneled through a metal
waveguide and into a stirrer fan, also positioned near the top of the cavity. The fan distributes the microwaves evenly within the oven.
Manufacturers vary the means by which they disburse microwaves to achieve uniform cooking patterns: some use dual stirrer fans located on opposite walls to direct microwaves to the cavity, while others use entry ports at the bottom of the cavity, allowing microwaves to enter from both the top
and bottom. In addition, many ovens rotate food on a turntable…