Make A Cheap & Easy Solar USB Charger With An Altoids Tin. Photos by Joshua Zimmerman The craftster behind the very popular $3 solar-powered emergency radio is back with a new awesome project: a cheap solar battery charger with a USB plug.
Zimmerman wrote, saying that he saw a lot of small solar powered chargers being talked about over Earth Day, but there was a big problem: "They're all quite nice, but also quite expensive. I don't think I've seen any for less than $60, and I've not seen one that really suits my style. " So, he came up with his own, using one of our favorite reusable items -- the ever wonderful Altoids tin.
In looking for the cheapest way to accomplish the task, Zimmerman found that he could build a USB solar charger for under $30 (or $10 if be buys parts in bulk, though it's not likely you'll be buying bulk solar cells and DC-to-USB converter circuits). Zimmerman states, "The central brain of our project is a DC to USB converter circuit. Free Energy solar Giant Water Parabola scorcher Cooker 1000f AQUA DEATH RAY SOLAR GRILL. CAS Raspberry Pi Educational Manual. You might remember that we mentioned last year that a team of UK teachers from Computing at School (CAS) was working on a Creative Commons licensed teaching manual for the Raspberry Pi, with recognition and encouragement from the Raspberry Pi Foundation.
That manual is now available at the Pi Store (which you’ll find on your Raspberry Pi’s desktop) as a PDF. If you’re not a Pi owner, there’s a link to a copy at the bottom of this post. The manual is released under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 unported licence, which is a complicated way of saying that it’s free for you to download, copy, adapt and use – you just can’t sell it. You’ll find chapters here on Scratch, Python, interfacing, and the command line. There’s a group at Oracle which is currently working with us on a faster Java virtual machine (JVM) for the Pi, and once that work’s done, chapters on Greenfoot and Geogebra will also be made available – we hope that’ll be very soon. The manual itself? Build a Retro Computer: The Raspberry Pi! R2B2-engl. ARCHI URBAIN (05/01) : Luc Schuiten / Vision sur la mobilité. ECAL Low-Tech Factory / Rocking-Knit. FACETURE от Phil Cuttance. Cinva Ram. [edit] Overview The Cinva Ram was developed in 1952 by Raul Ramirez of the Inter-American housing center in Columbia.
It was very popular in Columbia and neighbor developing countries, due to an effective low cost design. With this machine, 2 workers, 1 loading the machine and the other working the press, can produce roughly 2 bricks per minute solidworks files note, these plans are so far only on paper, the ram head might be to short, in a few days the prototype will be complete and ready for testing. [edit] See Also.