2.4GHz parabolic mesh dishes from Chinese cookware scoops & a USB WiFi adaptor! Called "WIFRY","WOKFI" or "WOKTENNA" (12"= 300mm diam) shows 12-15dB gain (enough for a LOS range extension to 3-5km)
Weekend Project Podcast: Make simple radios to listen too. These were made with materials that they could get their hands on and were small enough to carry around in a big pocket.
a manual clothes washer that does a load of laundry in about 20 minutes using no power other than muscle. It’s portable, so you can carry or wheel it to a water source, and if you wash with biodegradable soap, the wash water can easily go to a garden afterward.
video takes you through the process from start to finish, including all of the components you'll need to make your own: the mixing bowls, the fan motor, the propane torch, and of course, the sugar.