Hackaday Prize Entry: Customizable Linear Actuators

May 19, 2017 by Brian Benchoff 16 Comments

The current state of robotics, 3D printers, and CNC machines means any shade tree roboticist has the means to make anything move. Do you want a robotic arm? There are a dozen designs already available. Need an inverted powered pendulum? There are a hundred senior projects on that every semester. There is, however, one type of actuator that is vastly underutilized. Linear actuators aren’t ‘maker’ friendly, and building a customized linear actuator is an exercise in pain.

For their Hackaday Prize entry, the folks at Deezmaker are changing the state of linear actuators. They’ve created ‘Maker Muscle’, a linear actuator that’s fully customizable to nearly any length, power, speed, motor, or any other spec you could think of.

There were a few design goals for Maker Muscle. It must be modular, customizable, low-cost, and must allow for a lot of mounting options for use with t-slot aluminum extrusion. The answer to this is a completely custom aluminum extrusion. Basically, the motor mounts at one end, the actuator itself pokes out the other, and you can mount this device via the t-slot tracks around the edge of the extrusion. Think of it as the linear actuator version of MakerSlide, except instead of using this extrusion in CNC machines, it’s designed for moving shafts back and forth.

Already, Deezmaker has a working prototype and they’ve already moved onto a Kickstarter campaign for Maker Muscle. It’s a great idea, and we can’t wait to see what this neat product will be used for. You can check out a short demo video of Maker Muscle in action below.

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Hackaday Prize Entry: HeartyPatch

May 18, 2017 by Jack Laidlaw 12 Comments

[Ashwin K Whitchurch] and [Venkatesh Bhat] Have not missed a beat entering this year’s Hackaday Prize with their possibly lifesaving gadget HeartyPatch. The project is a portable single wire ECG machine in a small footprint sporting Bluetooth Low Energy so you can use your phone or another device as an output display.

Projects like this are what the Hackaday Prize is all about, Changing the world for the better. Medical devices cost an arm and a leg so it’s always great to see medical hardware brought to the Open Source and Open Hardware scene. We can already see many uses for this project hopefully if it does what’s claimed we will be seeing these in hospitals around the world sometime soon. The project is designed around the MAX30003 single-lead ECG monitoring chip along with an ESP32 WiFi/BLE SoC to handle the wireless data transmission side of things.

We really look forward to seeing how this one turns out. Even if this doesn’t win a prize, It’s still a winner in our books even if it only goes on to help one person.

Robotsota, Fighting Geese, And Machine Speak At World Create Day

May 18, 2017 by Brian Benchoff 1 Comment

A few weekends ago, we kicked the Hackaday Prize into gear with World Create Day. This was a celebration of building stuff, and served as a get together for master builders to figure out what they’re going to build this year. We had an amazing turnout all around the globe, and a splendid time was had by all. Continue reading “Robotsota, Fighting Geese, And Machine Speak At World Create Day” →

Hackaday Prize Entry: OLED Displays For Soldering Iron Tips

May 17, 2017 by Steven Dufresne 33 Comments

Having soldered one end of a wire to a switch, you move on to the next step in your hack, soldering the other end of the wire to the more temperature sensitive pin 11 on the 6847 video chip. You set the soldering pen’s target temperature to something lower. You position the end of a tinned wire just so, with the solder held between the ring and pinky fingers of the same hand. You stare hard at the pin while you still know which one it is. Luckily this soldering pen has a display in the handle, close enough for you to glance at it quickly and see that the target temperature has been reached. You solder the wire in place.

The previous hack was one I did back in 1982 to my TRS-80 color computer but alas, there was no display in the soldering pen’s handle. I was just too early for the sweet soldering pen that [vlk] is making, and has entered into the 2017 Hackaday Prize. It’s powered by a LiPo battery and can go from 25 to 400℃ in 5 seconds. The handle contains the electronics, including an STM32F031, and we’re impressed with how small he’s managed to get it all. Two buttons provide control and an OLED display simultaneously shows what looks like two target temperatures, the current temperature, voltages, battery charge level, and status. And if you want to make your own, his page even includes the schematics. Watch how easy it is to use in the videos below the break.

While [vlk]’s soldering pen has all the precision and ease of use you’d want, check out what is probably the simplest approach to soldering iron temperature control we’ve seen here. Or you could go for something in between, this one that’s also powered by LiPo batteries but has the display in a small laser cut box.

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Hackaday Prize Entry: Collaborative Water Purification

May 16, 2017 by Brian Benchoff 63 Comments

Look over any description of a water treatment plant, and you’ll find a description that includes the words, ‘coagulation tanks’. What are these treatment plants coagulating? You don’t want to know. How are they doing it? With chemicals and minerals. Obviously, there’s something else that can be done.

For their Hackaday Prize entry, [Ryan], [designbybeck], [Clint], [Wanda] and [Maker Mark] are investigating electrocoagulation. It’s an alternative to a frothy brew of chemicals that uses electricity to pull pollutants out of the water.

Right now, the tests are much smaller in scale than the tens of thousands of gallons you’d find at a water treatment plant. In fact, the test rig is only a 16-ounce mason jar. While this isn’t large enough to precipitate pollutants out of a household water supply, it is big enough for a proof of concept.

The team is using two electrodes for this build, one aluminum, and one iron. These electrodes are connected via alligator leads to the electronics board they’ve built. This electronics board is basically just an H-Bridge (used so they can reverse the polarity of the field emitter and prevent a buildup of gunk on the electrodes) and a few connectors to a power supply. The results are encouraging; they have a few time-lapse videos of a mason jar of dirty water clearing up with the power of electricity. It’s a great project with some great documentation. The team already has a bunch of updates on their project and instructions on how to replicate their hardware. You can check out those videos below.

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Sip-and-Puff Touchscreens And Grilled Meat During World Create Day

May 16, 2017 by Brian Benchoff 5 Comments

In the last few weeks, we’ve been seeing a remarkable growth in the entries to The Hackaday Prize. This is due in no small part to World Create Day, a worldwide celebration of building stuff. It’s a worldwide buildathon with hackerspaces all around the globe. Now we’re getting a peek at the results of these gatherings, the videos are posted, and we’re simply gobsmacked by what was created during World Create Day.

Spinal Cord Hacks

The gang over at the Blusson Spinal Cord Center in Vancouver put together a two-day event for World Create Day. The goal of this event was to build a lipsync; a device that enables people with limited use of their hands to use touchscreen devices. It looks like a ray gun, but it’s actually a sip-and-puff device entered into last year’s Hackaday Prize.

Gardening in Cyprus

The Limassol Hackerspace in Cyprus had what is probably the best World Create Day out of all the hackerspaces who took part. Why? Grilled meat, of course.

Instead of trying to improve the entire world, the team at the Limassol hackerspace decided to think locally. Improving their own hackerspace with an automated irrigation system for their vegetable garden, planting vegetables, and building a barbecue took up most of the events of the day. One member even built a few serving platters out of sections of a eucalyptus trunk. These sections of tree cracked, but with the clever application of a CNC router, this hackerspace was able to inlay a few butterflies in the wood. It looks great, and even better with a pile of skewered, grilled meat.

The Osaka Makers’ Space

A few of the members at the Osaka Makers’ Space — like most of us — are interested in miniature robot battles. The first part of the event was, of course, spent tinkering with these tiny robots. A few members of the space made a breakout board for a BLE module, coding it so it could be voice-activated. No, that’s probably not the best way to control a battling robot, but you should do what you want, not what other people think is best.

Also during World Create Day, a few members of the space built three tiny chairs for children. The kids, unfortunately, were busy watching Sesame Street. But hey, at least the screw holes were doweled up. Also on the roster for Osaka’s World Create Day was fixing a broken MacBook Air. The fan quit, and the repair involved soldering wires from the fan to pads on the motherboard.

La Orotava

The folks at the Orotava Hackerspace put on a great event for World Create Day. Wait, where’s Orotava? It’s a town on the island of Tenerife, in the Canary islands. No, the birds are named after the islands, and the islands are named after the dogs.

While they didn’t have hordes of hackers come to a Hackaday meetup on an island in the middle of the Atlantic (St. Helena meetup, anyone?), the Orotava hackerspace did have a few people show up to discuss Hackaday Prize projects. The interesting projects generated from this discussion included an automatic farming robot, mobility problems for mental patients, and a low-cost bandsaw.

Hackaday Prize Entry: Self Sustained Low Power Nodes

May 15, 2017 by Brian Benchoff 35 Comments

Consider for a second the Internet of Things. A vast network of connected devices, programmable matter, and wearable electronics can only mean one thing: there’s going to be a ton of batteries. While changing the battery in a smoke detector may seem tolerable, changing the batteries in a thousand sensor nodes is untenable. The solution to this problem is self-contained sensor nodes, and right now the best power source for mobile devices is probably solar.

For his Hackaday Prize entry, [Shantam Raj] is building a self-contained sensor node. It’s a Bluetooth device for the Internet side of this Thing, but the real trick to this device is solar energy harvesting and low power capabilities through optimized firmware.

Basically, this system is a low-power SoC with Bluetooth. The power from this device comes from a small solar cell coupled with a very efficient power supply and some new, interesting supercapacitors from Murata. These supercaps are extremely small, have high storage capacity, low ESR, and fast charging and discharging. The test board (seen in the video below) provides a proof of concept, but this device has a problem: there’s a single ‘sanity check’/power LED on the board that consumes 4 mA. The microcontroller, when running the optimized firmware, only consumes 1 mA. Yes, the LED thrown into the prototype that only serves as an indication the device is on is the biggest power sink in the entire system.

This project is great, and it’s exactly what we’re looking for in The Hackaday Prize. If the Internet of Things ever happens as it was envisioned, we’re going to be buried under a mountain of coin cell lithium batteries. Some sort of energy harvesting scheme is the only way around this, and we’re happy to see someone is working on the problem.

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