Crystal radio technology has been around for many years. This “bottle radio” take on a crystal radio requires no power source, operates on the power from radio waves, and receives signal from a long wire antenna.
As radio stations slowly move away from the AM band, the “window of opportunity” to experience this remarkable technology is dwindling.
The “crystal” in question is contained inside a germanium diode, and is used to rectify the radio signal so that our ears can hear it.
WARNING: This project should not be attempted without adult supervision and adequate training. Misuse, or careless use, of tools or projects may result in serious injury, property damage, and/or death. Use of this video content is at your own risk.
This isn’t looking good at all. What was supposed to be an easy day hike is quickly turning into a life threatening situation. You’re highest priority is to get a fire going before nightfall, but you can’t use your water bottle because all your clean water is gone.
This is a challenge that’s going to require a little more creativity. You’re going to have to light this fire … with your pee.
For this project you’re going to need some of that special yellow liquid, and the timing is great because with all that water you drank, nature is calling. You can use a container like your water bottle to collect as much as possible.
Now, that’s really not a lot, and it looks like you’re still a little dehydrated, but you’re going to have to make it work. When you flip the bottle over and attempt the water bottle trick from a previous video, it doesn’t seem to be working.
And that’s because you don’t have enough fluid in your bottle. You try removing the label to see if that helps, but it’s not making much of a difference.
Ok, time to check your lunch bag to see what other resources you have. There’s a bag of celery sticks that could be useful. But here’s something even better… your apple is wrapped with a plastic wrap. Perfect! Carefully remove the wrapper, making sure not to rip it, and now you’re going to need some rocks.
When you place these rocks in a circle, they’ve formed a crude concave mold. The rocks help form the wrapper into a bowl shape, and now you can add the liquid. When it’s filled to the edges, grab all the sides, and hold them together at the top, making this into a little liquid pouch. Twisting this pouch, while holding at the top, helps remove any air and seals the liquid inside.
When you twist the excess plastic around your middle finger like a ring, then wrap it around the base to hold it in place, the pressure can be adjusted, and you’ve got yourself a great little liquid lens that’s easy to use! It’s magnifying very well, so time to test it out on some tinder. One of the pages from your map should work perfectly, so focus the sunlight on the darkest ink you can find, because this will absorb the heat.
It’s incredible how quickly this starts smoking, and where there’s smoke, there’s a hope of fire! A hole is burning in the paper now, and when it’s about the size of a quarter it’s pretty well self sustaining.
Without wasting any time, try adding layers of dry grass, and blowing gently to add some air. It’s getting hot, and smoking quite a bit, so just blow a little stronger, and success! You’ve got a flame.
Without wasting any time, build your fire up, and it’s finished! You just lit a fire with your pee. Well there’s a little trick most people will never have to use, but might be good to know just in case.
A tutorial for how to create you first Ubuntu application. The tutorial shows how to create a simple web browser by generating a project, setting up your user interface, writing the code, and creating an Ubuntu package.