There’s no better way of improving a project than logging data to make informed decisions on future improvements. When it came to [Brian]’s latest project, an electric bike, he wanted to get as much data as he could from the time he turned it on until the time he was finished riding. He turned to a custom pyBoard-based device (and wrote it up on Hackaday.io), but made it stackable in order to get as much information from his bike as possible.
This isn’t so much an ebike project as it is about a microcontroller platform that can be used as a general purpose device. All of the bike’s controls flow through this device as a logic layer, so everything that can possibly be logged is logged, including the status of the motor and battery at any given moment. This could be used for virtually any project, and the modular nature means that you could scale it up or down based on your specific needs. The device is based on an ARM microcontroller so it has plenty of power, too.
While the microcontroller part is exceptionally useful ([Brian] talks about some of its other uses here and gives us even more data on his personal webpage), we shouldn’t miss the incredible bike that [Brian] built either. It has a 3 kW rear hub motor and can reach speeds of around 60 mph. While we let the commenters below hash out the classic argument of “bicycle vs. motorcyle” we’ll be checking out some electric vehicles that are neither.
We’ve been accused on more than one occasion…okay, pretty much every single day…of harboring some kind of creepy Arduino love affair. The topic does come up an awful lot here, we’re not oblivious to that, and had been patiently waiting for April Fool’s Day to post an article lampooning the whole situation, both ourselves and critics alike, so that everybody could have a good laugh (or possibly annihilate the entire planet in the resulting flame war, we’re not sure). And what could possibly make for a more self-referential joke than an Arduino shield…for Arduino?
Truth, as it turns out, is stranger than fiction. “Core2duino” is — seriously now, no joke — an Arduino shield containing a second ATmega microcontroller and full complement of I/O pins. The two chips in this Young Frankenstein-esque assemblage coordinate over the I2C bus, providing, at least in theory, more processing power, more I/O, and perhaps a degree of fault tolerance. In reality, we’re pretty skeptical, but do have to give them props for a great Instructable, detailing the whole process start to finish with Eagle CAD files, board etching and drilling, and advice on where to score free Cosmopolitan magazines (it helps “if you know any women,” we’re told).
There’s no indication whether this works with stacking headers to allow for an Arduino shield for Arduino shield for Arduino, or perhaps some Möbius strip-like endless stack of Arduinos. Feel free to discuss in the comments. We’ll be waiting in our concrete bunker 37 miles away!