This little gadget allows you to connect a 300 MHz, 10 dip-switch remote gate opener to a Raspberry Pi so that you can open a gate with just a few lines of code.
It connects directly to an off-the-shelf gate opener remote (sold separately, unless you choose the “Controller + Gate Opener” option) and uses a 5V relay for triggering the gate opener remote and a voltage conversion circuit for powering the gate opener remote (replacing the remote’s battery). It requires only 5V power, ground, and a single GPIO pin from your Raspberry Pi.
“The Open Source Hardware Association (OSHWA) is looking for a Community Coordinator to connect OSHWA with the Open Hardware Community. This position works directly with the community and our Executive Director to expand and communicate OSHWA’s initiatives, partners, and visibility. The position is a part time contractor at approximately 5-10 hours per week. The pay is $20/hour. OSHWA pays travel expenses related to the Open Hardware Summit, our annual community event.”
Entry Period 7:01 a.m. P.D.T on August 23, 2021 – 7:00 a.m. P.D.T on September 27, 2021
Finalists Announced 10/4
Rethink robotics with this challenge, utilizing hardware to create an assistant, a companion, or something else entirely!
Whether it’s a friendly digital face to keep you grounded, or a functional robotic arm to assist you in your projects, we want to see the droids and robots of the future! How can robotic companions or assistants help us thrive in this new normal? Your designs should utilize robotics in a unique way, as a personal assistant, a friendly companion, or something else entirely!
When you list a an item on Tindie, you can sell a basic product, and also add a variety of options. This could specify the color of a product’s enclosure, whether or not one would like a knob included, assembly, or any number of other services and add-ons. Some of these options may be important enough that you specify that a selection is required, however, there’s a bit of a gotcha here that may not be entirely obvious.
If you specify that a choice must be made, and if there’s only one choice specified, the buyer has to select it before making a purchase. So in the example below, the buyer is required to buy 90º headers, and has to make a choice between including clear heat shrink or not, as well whether or not to include connector wires.
With the prevalence of libraries, it has never been easier to communicate with hundreds of different sensors, displays, and submodules. But what is really happening when you type SPI.begin() into the Arduino IDE? In his most recent video, [Ben Eater] explores the Serial Peripheral Interface (SPI) and how it really works.
Most Hackaday readers probably know [Ben] from his breadboard-based computers, such as the 6502 build we featured in 2019. Since then he has been hard at work, adding new and interesting additions to his breadboard computer, as well as diving into different communication protocols to better understand and implement them. For this video, [Ben] set the goal of connecting the BME280, a common pressure, temperature, and humidity sensor with an SPI interface, to his breadboard 6502 computer. Along the way, [Ben] discusses how exactly SPI works, and why there is so much conflicting nomenclature and operations when looking at different SPI devices.
RISC-V International, a global open hardware standards organization, today announced the launch of the Open Hardware Diversity Alliance. The global Alliance, created by CHIPS Alliance, OpenPOWER Foundation, RISC-V, and Western Digital, will develop and provide learning and networking programs, mentorship opportunities and inclusive environments across the expansive ecosystem of open hardware. The Alliance will be focused on supporting professional advancement and encouraging equal participation for women and underrepresented individuals in the open hardware community.
“Communities benefit from a diverse set of ideas from the broad community. RISC-V is working to build, share, and support these inclusive opportunities by bringing new talent and ways of thinking to the open hardware community,” shared Kim McMahon, Director of Visibility and Community Engagement at RISC-V. “The Open Hardware Diversity Alliance will set the course for inclusivity in the open hardware community by building programs and diversity that inspires creativity and drives innovation.”
The Alliance aims to fill the gaps and create opportunities to improve career development in open hardware design by providing underrepresented individuals with the necessary steps and fostering inclusive environments. By providing a supportive community, the program will help to drive professional growth, empower the development of technical careers, encourage the recognition of all ideas in technical innovations and support career growth.
Glen Akins is getting ready for October with this spooky project:
This is video is a demonstration and explanation of my safety coffin grave bell Halloween prop for Halloween 2021. People were really worried about being buried alive in the late 18th and early 19th centuries. The safety coffin was devised as a way to alert the grave keeper that someone was trapped in their grave. It consisted of a string tied to the corpse’s finger that ran up to a bell tied above ground. If the recently deceased woke up in their coffin, they could ring the bell to summon help. When unsuspecting trick or treaters walk past the grave bell, it rings to summon the grave keeper so that the recently deceased can be rescued.
If you’re like us, you probably don’t finish a typical hardware project in one sitting. This doesn’t have to be a problem if you’re fortunate enough to have a dedicated workbench for your hacking activities; you simply leave your current project there, ready to continue when you have time again. But this is not always a workable option if you, or a housemate, needs to use the same desk for other tasks as well.
[!BATTA!] over at IKEAhackers ran into this problem, and solved it by building a complete electronics workstation inside a wardrobe. The base of this project is a storage unit called PAX, which is designed to store clothes and shoes but which also works just fine with project boxes. [!BATTA!] installed a variety of shelves and drawers to organize their collection of boxes and tools.
Not content with simple storage, [!BATTA!] decided to add a workbench, using a sturdy sliding tray that carries a working surface and a reinforced back panel to hold parts bins. Metal braces were added to prevent wobbliness, and the whole structure was bolted to a wall to prevent it from tipping over. When the workbench is not in use, the tray simply slides inside so the doors can be closed for a nice, clean look.
We really like the many clever storage solutions spread around the work area, such as a magnetic rail to hold hand tools and a “honeycomb” of PVC tubes for storing cables. Compact LED strips provide suitable lighting while a power strip with both mains and USB sockets brings juice to the tools and projects.
I have created several LED art pieces in Fibonacci patterns. They are all very labor intensive to create, and so are fairly expensive and limited in quantity. I wanted to come up with a Fibonacci layout that was at least slightly easier to create, and therefore more affordable.
I have RGB LEDs in just about every form they come: strips, strings, rings, discs, etc. The LEDs on most discs are arranged in very regular rings. Fibonacci64 is different. The LEDs are arranged in a Fibonacci distribution. The makes the layout very organic and seemingly messy. But with the proper animation, spiral patterns emerge with spectacular results.
The WS2812C-2020 each only consume a maximum of 5mA, and that’s at 100% brightness, solid white color. That’s only 320 mA for all 64 combined. They are still very bright, and I usually only run them at about 25% brightness. They’re perfect for wearables, powered with LiPo batteries.