Perfecting The Open Source RC Controller

Over the last few months we’ve seen an influx of homebrew RC controllers come our way, and we’re certainly not complaining. While the prices of commercial RC transmitters are at an all-time low, and many of them can even run an open source firmware, there’s still nothing quite like building the thing yourself. How else are you going to get exactly what you want?

For this entry into the 2019 Hackaday Prize, [Vitor de Miranda Henrique] is working on his own version of the ultimate open source remote control. His design follows some of the trends we’ve already seen in terms of outward design and hardware expandability, but also branches off into some new territory with features such as dual integrated displays.

Why does your controller need two displays? The top 4.3 inch TFT is linked up to a 5.2 GHz video receiver, which makes it perfect for controlling vehicles in “first-person” view, such as drones. The lower screen is a 2.8 inch touch screen from Adafruit, which is intended to be used for navigating through menus and options once the firmware is fully fleshed out.

Powering the controller is a ESP32 and dual MCP23017 GPIO expanders to connect up to the array of input devices available to the user. The current iteration of the controller has ten switches, two encoders, some buttons, and a pair of scroll wheels for good measure. Oh, and of course there are a couple of joysticks in the mix as well. All the devices terminate at a custom PCB in the back of the controller which looks to make modifying and adding input devices simple and neat.

We’ve previously seen the Alpha V1, an open source controller with a fairly similar setup, albeit without the dual displays. If even that one is a bit more complex than you’d like, you can always just do it with an Arduino.

No Keyboard Needed, This Laptop Is All Screens

If you have an eye for obscure Microsoft products, you may be aware of the Microsoft PixelSense, a table-sized horizontal touchscreen designed as a collaborative workspace. It’s a multi-user computer with no traditional keyboard or mouse, instead multiple users work with documents and other files as though they were real documents on a table. It’s an impressive piece of technology, and it was the first thing that came to mind when we saw [Anitomicals C]’s dual screen portable computer. It has a form factor similar to a large laptop, in which the touchscreen folds upwards to reveal not a conventional keyboard and trackpad, but another identical touchscreen. The entire surface of the computer is a touch display with a desktop propagated across it, and in a similar way to the Microsoft product the user can work exclusively in the touch environment without some of the limitations of a tablet.

He freely admits that it is a prototype and proof of concept, and that is obvious from its large size and extensive use of desktop components. But he has brought it together in a very tidy Perspex case serving as an interesting class in creating a portable computer with well-chosen desktop components, even though with no battery it does not pretend to fit the same niche as a laptop. We’d be interested to see the same interface produced as a less bulky desktop-only version with solely the two monitors, because the horizontal touch screen is what sets this machine apart from other home-made ones.

Home made laptops are a regular sight on these pages, but some of them are a little more rough-and-ready.

Continue reading “No Keyboard Needed, This Laptop Is All Screens”

Workshop Computer Floats Above Bench And Is Nearly Wireless


[Ezra] used the parts he had lying around to build a self-contained dual screen shop computer. What might one name such a project? Obviously you’d call it the Dr. FrankenComputer.

The lower monitor is a dell desktop flat screen. During prototyping [Ezra] used the stand to support everything. But to keep his work space clear the final version has been mounted to the wall in the corner of his lab. The upper display is the LCD from a Compaq laptop which he wasn’t using. The laptop still works and we believe that’s what is driving the Fedora system. A bracket mounted to the desktop screen’s inner skeleton supports the laptop screen and motherboard. One power supply feeds everything and connects to an outlet in the wall behind the monitors. The keyboard and mouse are wireless, as is the computer’s connection to the network.

The only thing we would worry about in our own shop is sawdust filling the heat sinks and other components of the motherboard. Perhaps his lab is electronic projects only or he has a dust cover that he uses when the system isn’t in use.