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In addition to getting a haircut, [Dino] spent his week editing an old video of him tearing down a Roomba 4000. These robots can be picked up for just a few dollars on eBay, making them one of the cheapest bodged up robotics dev platforms available. After [Dino] goes over how to unscrew the cover and disassemble the Roomba 4000, he goes over the layout of the motherboard and takes a look at … [Read more...]
Planning another Arduino build? If you're just doing something simple like switching a relay or powering a LED, you might want to think about the Digispark. It's a very small ATtiny-based Arduino compatible board developed and Kickstarted by [Erik]. The Digispark is based on the very popular Atmel ATtiny85, an 8 pin microcontroller that provides a quarter of the Flash storage and RAM as the … [Read more...]
For [Justin], the topic of remotely powering electronics in the field comes up often. So often in fact he decided to put up a tutorial for powering electronics from solar power and batteries, as well as sending and retrieving data with the help of a cellular connection. The electronics [Justin] chose for his remote wireless project include an AT&T 3G connection to the Internet provided by … [Read more...]
Aside from wanting to play around with nitric acid, [Ben] really didn't have a reason to decap a few 74xx and 4000-series logic chips. Not that we mind, as he provides a great tutorial at looking at a bare IC that isn't covered in epoxy and resin. Most ICs are encased in a hard epoxy shell making it very difficult to look at the circuits within. [Ben] tried to grind this epoxy off with a Dremel … [Read more...]
This completely DIY casting furnace turned out just great thanks to all the work [Biolit11] put into it along the way. He wanted to replace his older furnace with one that was more efficient, and to that end he built a heat exchanger into the design. This way the exhaust will preheat the intake air. The furnace itself started with the shell of an old electric water heater. Excluding the design … [Read more...]
The days of the 8 bit Arduino may be quickly coming to a close. Sure, there will always be a place for AVRs in blinking LEDs and turning on relays, but for doing anything cool - playing MP3s, driving LCD displays, or running a CNC machine - you need the power of a 32 bit chip. [Brian Carrigan] put up a great tutorial on getting started with these bigger, more powerful micros and moving beyond what … [Read more...]
Did you know it's possible to write Javascript code without using any letters or numbers at all? Well, it's not just Javascript, but that's the language used in this demonstration. [Patricio Palladino] shows how code can be written using just eight characters, and all of them are punctuation marks. Typecasting is the name of the game here. By starting out with an empty array formed by a pair of … [Read more...]
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