The ESP8266 is a popular WiFi chip that provides a relatively transparent connection between the TX and RX pins of a microcontroller and a WiFi network. It was released a little more than a year ago, and since then developers and hardware hackers have turned the ESP into much more than a serial to WiFi bridge. It’s a microcontroller platform unto itself, with a real development environment and support for the scripting language Lua.
A lot of people find scripting languages very productive and we’ve seen quite a few chips now supporting what you normally think of as a scripting language. These high-level abstraction languages are great, until they aren’t. When you need to go under the abstraction and do something complex or you need every cycle of performance, you might have to break your normal tools.
Given the small selection of materials, the entire project is a labor of love. Even the video (after the break) glosses over the careful selection of bearings, bolt-hole spacing, and time-sensitive gear ratios, each of which may be an easy macro in other CAD programs that [Lawrence], in this case, needed to add himself.
Finally, the entire project is open source and up for download on the Githubs. It’s not every day we can build ourselves a pendulum clock with a simple command-line-incantation to
Thanks for the tip, [Bartgrantham]!
Continue reading “Laser-Cut Clock Kicks Your CAD Tools to the Curb and Opts for Python”
[Daniel] has some awesome examples included on his website where you can test out the functionality for yourself. He has a hands-free scrolling example, spectrum plot, and even a virtual theremin. Since his code is bundled up into an easy-to-use library, it should be fairly easy to integrate into any webpage. The only real limitation to the library is that it only works in Chrome right now (Firefox doesn’t support disabling echo cancellation).
The 2015 Midwest RepRap Festival, a.k.a. the MRRF (pronounced murf) was just announced a few hours ago. It will be held in beautiful Goshen, Indiana. Yes, that’s in the middle of nowhere and you’ll learn to dodge Amish buggies when driving around Goshen, but surprisingly there were 1000 people when we attended last year. We’ll be there again.
A few activists in St. Petersburg flushed GPS trackers down the toilet. These trackers were equipped with radios that would send out their position, and surprise, surprise, they ended up in the ocean.
[Stacy] has been tinkering around with Unity2D and decided to make a DDR-style game. She needed a DDR mat, and force sensitive resistors are expensive. What did she end up using? Velostat, conductive thread, and alligator clips.
The Open Source RC is a beautiful RC transmitter with buttons and switches everywhere, a real display, and force feedback sticks. It was a Hackaday Prize entry, and has had a few crowdfunding campaigns. Now its hit Indiegogo again.
Speaking of crowdfunding campaigns, The Mooltipass, the designed-on-Hackaday offline password keeper, only has a little less than two weeks until its crowdfunding campaign ends. [Mathieu] and the rest of the team are about two-thirds there, with a little more than half of the campaign already over.
This technique can be expanded to provide bidriectional communication between a microcontroller and a computer. On the project Github, [Gordon] used the microphone pin on a TRRS jack to sent data to a computer. It needs two more resistors, but other than that, it’s as simple as the one-way communications setup.
[Gordon] put together a few demos of the program, including one that will change the color of some RGB LEDs in response to input on a webpage.
Continue reading “Using a Headphone Jack as a UART”