Crystal radios are old news, but great fun. What would happen if a PhD designed a crystal set? By PhD we mean Pizza Hut Deliveryperson and [John Greenlee] (who may not actually be a PhD of either kind; we don’t know) gives us a good idea with his crystal radio in a pizza box.
Pizza boxes aren’t the only food-related material in this radio. [John] makes a tuning capacitor out of cake rounds. Coincidentally, he decorates the tuning capacitor to look like a pizza.
The schematic itself is unremarkable–just a common crystal set. But the construction of the chassis and the capacitor make it an interesting project. If you know a young person that has any interest in radio, a crystal receiver is a rite of passage you shouldn’t deny them and this one is certainly a novelty. The picture of a pizza takes it even one step further than this YouTube build, which is nonetheless a good resource.
The instructions are well done, although some of the parts may be slightly hard to find. Germanium diodes and high-Z earphones are not as plentiful as they used to be, although you can still find them if you look.
Don’t heat up your house this summer, build your own backyard pizza oven instead. We love to using our garden produce, homemade dough, and fresh farmer’s market mozzarella to whip up a tasty pie in the summer. But it can be tricky to cook it on the grill and we hate heating up the oven when it’s hot out. This could be a perfect solution.
The footprint of the oven used to be a flower bed in [Furiousbal’s] yard. He removed the soil and side walls, laid down a bed of pea gravel, then started building the brick base for the oven. The base is insulated by encasing beer bottles in a bed of clay which he harvested locally. Fire brick then makes the floor of the cooking area as well as the arched opening. To support the clay during construction he built a dome of wet sand and covered it with damp newspaper. The clay is built up in layers before removing the sand from the inside. The final step (not shown above) is to build a little shelter to ensure the elements don’t wash away your hard work.
Plagued with a tablet dock that wasn’t weighty enough to prevent the device from tipping over [John] filled base with lead to keep the thing upright.
[Helmut’s] bathroom had no windows. He faked one using an Arduino and an RGB led.
And finally, as a reward for all the readers that made it to the bottom of the article, here’s a gem of a project. [Charlie] was inspired by the recent logic combo lock post to send in his own plans for a lock he made years ago. Unfortunately he can’t find the pictures from the build but the theory behind it is quite engaging.
If you think there’s never enough computerized numerical control in your life perhaps the pizza plotter should be your next project. This is a large 2-axis machine that shoots pressurized sauce onto a pizza crust. It’s a food-grade RepStrap and appears to use a garden sprayer as a reservoir. They learned their lesson when a loose hose clamp sprayed sauce around the room. We’re thinking this is a bit of reinventing the wheel as pizza-making factories but it’s fun nonetheless.
In an act of delicious over kill, these guys threw a pizza into an industrial laser cutter. The result? Exactly what you would expect. Smoke, giggles and perfectly cut pizza. It looks like the cheese stuck together a bit after the laser cut, but that happens with normal pizza cutters too. [via DVICE]
A small group of enthusiasts have apparently been restoring and reprogramming the animatronic bands from the former Showbiz Pizza Place chain. Original engineer [Aaron Fechter] and car salesman/choreographer [Chris Thrash] have started performing modern pop songs with the bands and have a page where you can bid on new songs to perform. This feels like Billy Bass hacking on a much larger scale. The original machines were controlled by a four track reel, but now they’re using a hard disk recorder. The trailer above is worth watching just for the rows of partially assembled bears performing on the factory floor.