Author: Gerrit Coetzee

476 Articles

Feel The Virtual Road With Force Feedback

November 22, 2019 by 7 Comments

When you’re driving your virtual supercar around the Italian countryside the last thing you want is an inauthentic steering wheel feel, that’s where Open FFBoard comes in. Racing game enthusiasts will go to impossible and sometimes incredibly expensive lengths to build extravagant simulators. [Yannick] feels many of these products are just a little too pricey without much need.

Right now his board is still in a process of iteration, though it can integrate with Assetto Corsa already. You can see in the demo video after the break that it responds quite realistically to the video game state, however problems keep cropping up in search of solutions. Motor drivers burn out and power resistors are added: that energy has to go somewhere. Next up will be switching to the increasingly popular Trinamic drivers. Either way we can’t wait to see the next revision and to get another amazing simulator build sent in to us, maybe centered around the Open FFBoard.

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Little Flash Charges In 40 Seconds Thanks To Super Capacitors

November 21, 2019 by 10 Comments

We’ve all committed the sin of making a little arduino robot and running it off AA batteries. Little Flash is better than that and runs off three 350 F capacitors.

In fact, that’s the entire mission of the robot. [Mike Rigsby] wants people to know there’s a better way. What’s really cool is that 10 A for 40 seconds lets the robot run for over 25 minutes!

The robot itself is really simple. The case is 3D printed with an eye towards simplicity. The brains are an Arduino nano and the primary input is a bump sensor. The robot runs around randomly, but avoids getting stuck with the classic reverse-and-turn on collision.

It’s cool to see how far these capacitors have come. We remember people wondering about these high priced specialty parts when they first dropped on the hobby scene, but they’re becoming more and more prevalent compared to other solutions such as coin-cells and solder tab lithium batteries for PCB power solutions.

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Open Source Kitchen Helps You Watch What You Eat

November 20, 2019 by 6 Comments

Every appliance business wants to be the one that invents the patented, license-able, and profitable standard that all the other companies have to use. Open Source Kitchen wants to beat them to it. 

Every beginning standard needs a test case, and OSK’s is a simple one. A bowl that tracks what you eat. While a simple concept, the way in which the data is shared, tracked, logged, and communicated is the real goal.

The current demo uses a Nvidia Jetson Nano as its processing center. This $100 US board packs a bit of a punch in its weight class. It processes the video from a camera held above the bowl of fruit, suspended by a scale in a squirrel shaped hangar, determining the calories in and calories out.

It’s an interesting idea. One wonders how the IoT boom might have played out if there had been a widespread standard ready to go before people started walling their gardens.

A Scratch-built RISC-V CPU In An FPGA

November 19, 2019 by 17 Comments

“RISC architecture is going to change everything”, which is why [SHAOS] is building this cool RISC-V DIY retro-style computer.

The project took inspiration from another hacker’s work in building a RISC-V emulator; shared in the Hackaday FPGA chat. He took it a bit further and got it going on an UPDuino v2.0 board which features a iCE40 FPGA from Lattice.

The board passes all the tests for the RISC-V subset he’s aiming for and even run some Zephry RTOS examples. He’s done a really good job of documenting how he got the code to run as well as many of the experiments he’s run so far. All the project files for ICEcube2 software are posted. It’s not the only RISC-V CPU we’ve seen in an FPGA, but the code is actually very clear and worth a read if you’re into such things.

We think anyone interested in duplicating his work could do so somewhat easily and start playing around with this increasingly popular architecture. Or at least get some LED’s blinking in an arcane but meaningful way. Video after the break.

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This RGB Tree Has Its Roots In A PCB

November 18, 2019 by 1 Comment

[Paczkaexpress]’s RGB tree is a mix of clever building techniques and artistic form that come together into quite a beautiful sculpture.

The branches of his tree are made from strands of enameled copper wire capped with an RGB LED and terminated in a female header. The separate wires are all wound and sculpted into the form of a tree. The wire is covered in a very thin layer of plastic, which we highly recommend observing under a microscope, that allow it to maintain a uniform and reflective copper color without shorting, adding to the effect.

The part we found an especially pleasing mix of form and function was how the “roots” of the tree clicked home in the PCB base. The PCB holds the STM32, power components, and an LED Driver. It doesn’t hide how the magic works, and the tree really does get its nutrients from the soil it’s planted in. This would be a fun kit to build. Very clever and you can see the final effect after the break.

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Tangible Programming Brings Code Into The Real World

November 17, 2019 by 12 Comments

We love the idea of [Amos]’s Tangible Programming project. It reminds us of those great old Radioshack electronics labs where the circuitry concepts took on a physical aspect that made them way easier to digest than abstractions in an engineering textbook.

MIT Scratch teaches many programming concepts in an easy to understand visual way. However, fundamentally people are tactile creatures and being able to literally feel and see the code laid out in front could be groundbreaking for many young learners. Especially those with brains that favor physical touch and interaction such as ADHD or Asperger’s minds.

The boards are color-coded and communicate via an I2C bus. Each board’s logic and communication is handled by an ATTiny or ATMega. The current processing is visible through LEDs or even an OLED display. Numbers are input either through thumbwheel switches or jumpers.

The code concepts will, of course, be simple and focused due to the physical nature of the blocks. Integer arithmetic, simple loops, and if/else conditionals. Quite a lot of concepts can be built around this and it could be a natural diving board into the aforementioned Scratch and eventually an easy to learn language like python.

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Finally Your Air Drumming Has An Outlet

November 15, 2019 by 8 Comments

Two engineering students are hard at work on this air drum which they hope will help disabled people and people in nursing homes. Though, we think it just looks fun!

Each board is its own module consisting of the electronics and 3D printed cases. The modules each contain an arduino mini, IR sensor, and LEDs. They share power, audio, and communicate with an i2c bus. Two modules are special, one holds the power system and the other a Raspberry Pi. The units can be put together in different configurations. Finally, they are capped with speaker units.

The demo shown in the video, which you can see after the break, looks fun. The response time is pretty fast and it looks like you can measure all sorts of parameters. This can then be translated into different velocities, pitches, and instruments. It’s somewhere between a theremin and a drum kit, very cool.

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