DIY Neuroscience Hack Chat

Join us on Wednesday, February 24 at noon Pacific for the DIY Neuroscience Hack Chat with Timothy Marzullo!

Watch a film about a mad scientist from the golden age of Hollywood and chances are good that among the other set pieces, you’ll see human brains floating in jars of cloudy fluid wired up to electrodes and fancy machines. It’s all made up, of course, but tropes work because they’re based on a kernel of truth, and we in the audience know that our brains and the other parts of our nervous system do indeed work on electricity. Or more precisely, excitable tissues in our nervous systems pass electrochemical signals between themselves as waves of potential across cell membranes.

Studying this electrical world locked away inside our heads is a challenging, but by no means impossible, pursuit. Usable signals can be picked up, amplified, digitized, and recorded to help us understand what’s going on when we think, feel, move, sleep, wake, or just be. Neuroscience has made tremendous strides looking at these signals, but the equipment to do so has largely remained the province of large universities and teaching hospitals with ample budgets, leaving the amateur neuroscientist out of luck.

Tim Marzullo, co-founder of Backyard Brains, is looking to change all that. While working on his Ph.D. in neuroscience at the University of Michigan, he and Greg Gage looked for ways to make the tools of neuroscience research affordable to everyone. The result is the Neuron SpikerBox, a low-cost bioamplifier that can tap into the “spikes” of action potential in live neurons. Open-source tools like these have helped educators bring neuroscience experiments to STEM students, and even helped other scientists set up novel, low-cost experiments.

Tim will join us on the Hack Chat to talk about doing DIY neuroscience and designing the instruments that make it possible. Bring your “mad scientist” questions as we push back the veil of ignorance on how our brains work, one neuron at a time.

join-hack-chatOur Hack Chats are live community events in the Hackaday.io Hack Chat group messaging. This week we’ll be sitting down on Wednesday, February 24 at 12:00 PM Pacific time (UTC-8). If time zones have you tied up, we have a handy time zone converter.

Click that speech bubble to the right, and you’ll be taken directly to the Hack Chat group on Hackaday.io. You don’t have to wait until Wednesday; join whenever you want and you can see what the community is talking about.

 

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Signal Conditioning Hack Chat This Wednesday

Join us on Wednesday, February 17 at noon Pacific for the Signal Conditioning Hack Chat with Jonathan Foote!

The real world is a messy place, because very little in it stays in a static state for very long. Things are always moving, vibrating, heating up or cooling down, speeding up or slowing down, or even changing in ways that defy easy description. But these changes describe the world, and understanding and controlling these changes requires sensors that can translate them into usable signals — “usable” being the key term.

Making a signal work for you usually requires some kind of signal processing — perhaps an amplifier to boost a weak signal from a strain gauge, or a driver for a thermocouple. Whatever the case, pulling a useful signal that represents a real-world process from the background noise of all the other signals going on around it can be challenging, as can engineering systems that can do the job in sometimes harsh environments. Drivers, filters, amplifiers, and transmitters must all work together to get the clearest picture of what’s going on in a system, lest bad data lead to bad decisions.

To help us understand the world of signal conditioning, Jonathan Foote will drop by the Hack Chat. You may remember Jonathan as the “recovering scientist” who did a great Remoticon talk on virtual modular synthesizers. It turns out that synths are just a sideline for Dr. Foote, who has a Ph.D. in Electrical Engineering and a ton of academic experience. He’s a bit of a Rennaissance man when it comes to areas of interest — machine learning, audio analysis, robotics, and of course, signal processing. He’ll share some insights on how to pull signals from the real world and put them to work.

join-hack-chatOur Hack Chats are live community events in the Hackaday.io Hack Chat group messaging. This week we’ll be sitting down on Wednesday, February 17 at 12:00 PM Pacific time. If time zones have you tied up, we have a handy time zone converter.

Click that speech bubble to the right, and you’ll be taken directly to the Hack Chat group on Hackaday.io. You don’t have to wait until Wednesday; join whenever you want and you can see what the community is talking about.

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Finishing Your Projects Hack Chat With Zack Freedman

Join us on Wednesday, February 10 at noon Pacific for the Finishing Your Projects Hack Chat with Zack Freedman!

Try as we might, some of us are much better at starting projects than finishing them. Our benches — or all too often, our notebooks — are graveyards of good attempts, littered with the scraps of ideas that really sounded good at the time and clouded by a miasma of good intentions and protestations that “This time, it’ll be different.” Spoiler alert: no, it won’t.

Trying to pin the cause of this painfully common problem on something specific is probably a fool’s errand, especially when given the fact that some people mysteriously don’t suffer from it, it would appear brain chemistry plays a role. Maybe some people just really like the dopamine hit of starting something new, which gives them the rush of excitement while the idea is still fresh, only to have it wane rapidly as the project enters the churn.

Whatever it is, if you suffer from it, chances are good you’ve looked for a way out at least once. If so, you’ll want to hop into this Hack Chat, where “very serious hacker” Zack Freedman, proprietor of the Voidstar Labs channel on YouTube, will share his thoughts on project follow-through. We’ve enjoyed Zack’s projects for a while now, and covered a few, from his in-your-face (on-your-wrist?) smartwatch to his video editing keypad. He gets stuff done, perhaps in part due to his workshop organization, but however he does it, we’re eager to hear about it. Join us as we discuss the art of follow-through and getting stuff done.

join-hack-chatOur Hack Chats are live community events in the Hackaday.io Hack Chat group messaging. This week we’ll be sitting down on Wednesday, February 10 at 12:00 PM Pacific time. If time zones have you tied up, we have a handy time zone converter.

Click that speech bubble to the right, and you’ll be taken directly to the Hack Chat group on Hackaday.io. You don’t have to wait until Wednesday; join whenever you want and you can see what the community is talking about.

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Mechanical Timekeeping Hack Chat With Clickspring

Join us on Wednesday, February 3 at noon Pacific for the Mechanical Timekeeping Hack Chat with Clickspring!

The reckoning of the passage of time has been of vital importance to humans pretty much for all our history, but for most of that time we were stuck looking at the movements of heavenly bodies or noting the changing of the seasons to answer questions of time. The search for mechanical aids to mark the passage of time began surprisingly early, though, pretty much from the time our ancestors first learned to work with metals.

Timekeeping devices were often created to please a potentate or to satisfy a religious imperative, but whatever the reason for their invention, these early clocks and calendars were key to a ton of discoveries. Timekeeping devices were among the first precision mechanisms, and as such formed the basis of much of our mechanical world. A mechanical representation of the passage of time also gave us some of the first precise observations of the physical world, which led to an enormous number of discoveries about the nature of the universe, not to mention practical skills such as navigation, which allowed us to explore the world with greater confidence.

In our era, precision timekeeping has moved beyond the mechanical realm into the subatomic world, and mechanisms built to please a prince are relegated to museums and collectors. That’s not to say there isn’t plenty to learn from the building of mechanical timepieces, as anyone who has watched any of the videos on Clickspring’s YouTube channel can attest. Clickspring not only makes some magnificent modern timepieces, like his famous open-frame clock, but recently he’s also branched out into the timekeeping mechanisms of the ancients. He built a reproduction Byzantine sundial-calendar, and tackled a reproduction of the famous Antikythera mechanism. The latter was undertaken using only the tools and materials that would have been available to the original maker. That led to an unexpected discovery and a detour into the world of scholarly publishing.

Clickspring has been busy lately, but he made some time to stop by the Hack Chat and talk about mechanical timepieces. We’ll talk about his modern builds, his forays into the mechanisms of antiquity, and his serendipitous discovery. On the way we’re likely to talk about what it takes to build precision mechanisms in a small shop, and whatever else that crops up.

join-hack-chatOur Hack Chats are live community events in the Hackaday.io Hack Chat group messaging. This week we’ll be sitting down on Wednesday, February 3 at 12:00 PM Pacific time. If time zones have you tied up, we have a handy time zone converter.

Click that speech bubble to the right, and you’ll be taken directly to the Hack Chat group on Hackaday.io. You don’t have to wait until Wednesday; join whenever you want and you can see what the community is talking about.

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ESP32-S2 And RP2040 Hack Chat With Adafruit

Join us on Wednesday, January 27 at noon Pacific for the ESP32-S2 and RP2040 Hack Chat with Adafruit!

It’s always an event when we have Adafruit on the Hack Chat, and last time was no exception. Then, the ESP32-S2 was the new newness, and Adafruit was just diving into what’s possible with the chip. It’s an interesting beast — with a single core and no Bluetooth or Ethernet built-in, it appears to be less capable than other Espressif chips. But with a faster CPU, more GPIO and ADCs, a RISC-V co-processor, and native USB, the chip looked promising.

Among their other duties, the folks at Adafruit have spent the last six months working with the chip, and they’d now like to share what they’ve learned with the community. So Limor “Ladyada” Fried, Phillip Torrone, Scott Shawcroft, Dan Halbert, and Jeff Epler will stop by the Hack Chat to show us what’s under the hood of the ESP32-S2. They’ve worked on a bunch of projects using the chip, and they’ve taken a deep-dive into the chip’s deep-sleep capabilities, so stop by the Chat with your burning questions about low-power applications or anything ESP32-S2-related and ask away.

Plus, a late and exciting addition to the agenda: they’ll be talking about the recently released RP2040, the first custom chip from the folks at Raspberry Pi. We’ve already started talking about the Raspberry Pi Pico​, the dev board that uses the chip, and Adafruit will share what they’ve learned about the RP2040 so far.

join-hack-chatOur Hack Chats are live community events in the Hackaday.io Hack Chat group messaging. This week we’ll be sitting down on Wednesday, January 27 at 12:00 PM Pacific time. If time zones have you tied up, we have a handy time zone converter.

Click that speech bubble to the right, and you’ll be taken directly to the Hack Chat group on Hackaday.io. You don’t have to wait until Wednesday; join whenever you want and you can see what the community is talking about.

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Movie Magic Hack Chat

Join us on Wednesday, January 20th at noon Pacific for the Movie Magic Hack Chat with Alan McFarland!

If they were magically transported ahead in time, the moviegoers of the past would likely not know what to make of our modern CGI-driven epics, with physically impossible feats performed in landscapes that never existed. But for as computationally complex as movies have become, it’s the rare film that doesn’t still need at least some old-school movie magic, like hand props, physical models, and other practical effects.

To make their vision come to life, especially in science fiction films, filmmakers turn to artists who specialize in practical effects. We’ve all seen their work, which in many cases involves turning ordinary household objects into yet-to-be-invented technology, or creating scale models of spaceships and alien landscapes. But to really sell these effects, adding a dash of electronics can really make the difference.

Enter Alan McFarland, an electronics designer and engineer for the film industry. With a background in cinematography, electronics, and embedded systems, he has been able to produce effects in movies we’ve all seen. He designed electroluminescent wearables for Tron: Legacy, built the lighting system for the miniature Fhloston Paradise in The Fifth Element, and worked on the Borg costumes for Star Trek: First Contact. He has tons of experience making the imaginary look real, and he’ll join us on the Hack Chat to discuss the tricks he keeps in his practical effects toolkit to make movie magic.

https://www.youtube.com/watch?v=e13S0SenmPQ

join-hack-chatOur Hack Chats are live community events in the Hackaday.io Hack Chat group messaging. This week we’ll be sitting down on Wednesday, January 20 at 12:00 PM Pacific time. If time zones have you tied up, we have a handy time zone converter.

Click that speech bubble to the right, and you’ll be taken directly to the Hack Chat group on Hackaday.io. You don’t have to wait until Wednesday; join whenever you want and you can see what the community is talking about.

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Plant Communication Hack Chat

Join us on Wednesday, January 13th at noon Pacific for the Plant Communication Hack Chat with Lex Kravitz!

As far as conversation goes, plants are usually a pretty poor choice of partners. Sure, we’ve all heard that talking to you houseplants is supposed to be good for them, but expecting them to talk back in any meaningful way is likely to end in disappointment.

Or is it? For as simple and inanimate as plants appear to be, they actually have a rich set of behaviors. Plants can react to stimuli, moving toward attractants like light and nutrients and away from repellents. Some trees can secrete substances to prevent competitors crowding around them, by preventing their seedlings from ever even taking root. And we’ve known for a long time that plants can communicate with each other, through chemical signaling.

Plants are clearly capable of much more than just sitting there, but is there more to the story? Neuroscientist Lex Kravitz thinks so, which is why he has been wiring up his houseplants to sensitive amplifiers and looking for electrical signals. While the bulk of what we know about plant communications is centered on the chemical signals they send, it could be that there’s an electrical component to their behaviors too. Join us as Lex stops by the Hack Chat to talk about his plant communication experiments, and to see if it may someday be possible to listen in on what your plants are saying about you.

join-hack-chatOur Hack Chats are live community events in the Hackaday.io Hack Chat group messaging. This week we’ll be sitting down on Wednesday, January 13 at 12:00 PM Pacific time. If time zones have you tied up, we have a handy time zone converter.

Click that speech bubble to the right, and you’ll be taken directly to the Hack Chat group on Hackaday.io. You don’t have to wait until Wednesday; join whenever you want and you can see what the community is talking about.

Continue reading “Plant Communication Hack Chat”