[K6ARK] likes to operate portable, so he puts together very lightweight antennas. One of his latest uses tiny toroids and SMD capacitors to form trap elements. You can see the construction of it in the video below.
You usually think of toroid winding as something you do when building transmitters or receivers, especially small ones like these. We presume the antenna is best for QRP (low power) operation since the tiny core would saturate pretty quickly at higher power. Exactly how much power you should pass through an FT50-43 core depends on the exact application, but we’ve seen numbers around 5 watts.
The 2021 Open Hardware summit will be held online again, Friday April 9, 2021. Just like this year, the summit will be livestreamed, but ticket holders will have access to additional interactive portions of the summit like meet-and-greets, workshops, and sponsor booths.
If there is one thing we’ve learned during several years of running the Hackaday SMD soldering challenge it is this: Most people need magnification to do good soldering at a tiny scale. The problem is, like most tools, you can buy something as cheap as a $5 binocular headset or you can spend $1,000 or more on a serious microscope. What’s in between? [Noel] looks at some affordable options in a recent video that you can see below.
[Noel] started out with a cheap “helping hand” that has a simple little magnifying glass attached to it. The major criterion was to find something that would have no delay so he could solder under magnification. While it is possible to work under a scope with a little lag in the display, it is frustrating and there are better options.
Oregon State University must be a pretty good place to go to school if you want to hack on robots. Their robotics club, which looks active and impressive, has a multi-part video series on how to solder surface mount components that is worth watching. [Anthony] is the team lead for their Mars Rover team and he does the job with some pretty standard-looking tools.
The soldering station in use is a sub-$100 Aoyue with both a regular iron and hot air. There’s also a cheap USB microscope that looks like it has a screen, but is covered in blue tape to hold it to an optical microscope. So no exotic tools that you’d need a university affiliation to match.
Even if you’ve done a lot of SMD soldering, you can always pick up new tips and tricks. There’s lots of flux, of course, and careful alignment before you secure the component down. We know the feeling of leaving a bad solder joint long enough to go secure the other pads and then cleaning it up at the end.
The programming daughter-board for the CPC2 is on its way, most likely making its slow way through the USPS. Rather than wait a few more weeks for the board to arrive, I thought I’d share the 3D render for the board.
Building this board was an exciting new development in the project as the board was designed using KiCad. Transitioning to KiCad from DesignSpark was not a decision undertaken lightly. The proprietary nature of DesignSpark, coupled with the forced upgrades and continual re-registration process convinced me to give KiCad a go. After a few hours of learning the new work-flow and learning the huge number of short-cut keys, and I was building boards like a pro.
The models for the components I used were either available from the Mouser web site, or were created at my request by the wonderful folks at SamacSys. While I did trial the process of creating new components and footprints, this was unnecessary as everything I needed was provided for me.
Every year you find yourself wanting to build an awesome hack to show off on New Year’s Eve, but like all hackers, you procrastinate and it’s a rush job, if it happens at all. But considering the hot mess of a year 2020 has been, let’s all plan ahead and give 2020 the boot by building the things that make us happy.
The Goodbye 2020! contest kicked off this morning: build something that ushers in the new year in a fun and creative way. Maybe it’s a robot that tears off the pages of a daily desk calendar of 2020, shredding one for each of the last 365 minutes of the year. Build a video countdown device that works with any HDMI screen, or a dedicated LED display — perhaps in hat, glasses, or sweater form factor? There’s unlimited room for creativity here, so don’t forget to show us video of it to get the full effect.
Top three finishers will win a $500, $250, or $100 shopping spree from Digi-Key electronics who are sponsoring the Goodbye 2020! contest. Start your project page on Hackaday.io right now and use the “Submit project to…” drop-down box on the left sidebar to enter it into the contest. We’ll be keeping an eye out for awesome entries from now until the end of December.
In this project, I convert a set of illuminated push buttons from a vintage Grass Valley video mixer into a custom vendor-defined USB HID peripheral. Like the USB analog panel meters project, this project uses a Silicon Labs EFM8UB1 microcontroller for USB connectivity. Unlike the panel meters project which only received data from the USB host, this project needs to send data back to the USB host too.
In this write up, we’ll reverse engineer the button panel, decide on a strategy for reading the keys and controlling the LEDs, build a board, then write both embedded and Linux software to interface with the button panel. If you want to build your own device like this but don’t have this specific switch panel, don’t worry–the ideas presented here are applicable to any generic 3×4/4×3/4×4 matrix keypad with or without LEDs.