EW

Elliot Williams

Things Elliot Says on Podcasts

Editor at Hackaday covering hardware hacks, electronics and maker projects. Hosts the weekly Hackaday Podcast, joined by Hackaday colleagues including Jenny List, Al Williams, Tom Nardi and Kristina Panos. Appeared as a guest on The Amp Hour in 2019.

Where to Find Them

Elliot Williams hosts Hackaday Podcast . They have also been a guest on The Amp Hour Electronics Podcast .

Recently: “Ep 393: Epaper, Tamagotchi Hacks, and Supercon Talks Galore” on Hackaday Podcast (October 2026); “Ep 392: Microscopes, Drones, and Other DIY Things” on Hackaday Podcast (October 2026); “Ep 391: Tuned in to ESP32 SDR, New Old Pagers, and Bugs on Mars” on Hackaday Podcast (October 2026); “Ep 390: DOOM, Cranium Stuff, and Odd OpenSCAD Opportunities” on Hackaday Podcast (October 2026); “Hackaday Podcast Ep 389: Spinning Lightfield Displays and Jenny Visits a Blast Furnace” on Hackaday Podcast (October 2026); “Ep 388: RAM-Swapping on Raspberry Pi, Raindrops on Radar, and a Fine Mesh” on Hackaday Podcast (September 2026).

What They Said

“I've always wanted to know why we weren't, you know, collectively hacking on cell phones. I've been asking myself this question for 10 years. And this year, it seems to be, we're starting to do it. And I love to see it.” — Elliot Williams, Hackaday Podcast

Elliot was describing a build that uses the board from a used, roughly $25 Android phone as the video and control link for an RC plane. He says it is one of several recent projects that reuse old phones as cheap single-board computers.

Hackaday Podcast · 2026-10-30 Permalink → Listen →
Hackaday Podcast Around 21:33 into the episode
Elliot Williams

Well, nobody's broadcasting anything for your old CRT TVs, so you've got to do it yourself.

Jenny List

…he's got a ton of Raspberry Pis in there. What he's done is he's got a big switch mode power supply that could supply lots and lots of amps at 5 volts, and he's running them all off this big switch mode power supply because that many Raspberry Pi wall warts would take up a lot of. Extension leads.

Elliot Williams

…stuff gets taken care of at the low level in the microcontroller on the flight controller, which makes a hell of a lot of sense. The video and the control stuff gets to take place on the formerly cell phone, whatever it is, single board computer that he's made out of it. What's fun here is that we've seen a bunch of repurposing old cell phones as single board computers projects lately. And I've always wanted to know why we weren't, you know, collectively hacking on cell phones. I've been asking myself this question for 10 years. And this year, it seems to be, we're starting to do it. And I love to see it. This one's just beautiful. He pops the brains out of a Xiaomi 8 note. I guess 25 bucks used gets you one of these.

Jenny List

What a time to be alive when a phone like that is 25 bucks.

Elliot Williams

If it has a broken screen, I bet you can get it even cheaper. You don't even need the screen in this hack. And that's actually kind of one of the neat complications that goes on here is that when he undoes the screen, he finds out that the phone boots up extra slow. It looks like it's searching for…

Jenny List

I think one of the reasons we haven't been reusing old cell phones is that a lot of people want to use it effectively as the machine it is with a display and interface and stuff. And often they come with, they'll run a Linux of some variety, but they'll come with some very proprietary blobs. So you…

Speaker names come from our own diarization. The position is estimated from where the line sits in the episode.
“Light is a lot less tweaky than radio. You don't have to worry about… building a damn radio transmitter, and it's not illegal to transmit light. You can transmit light however and wherever you want, and the FCC doesn't even come knocking on your door.” — Elliot Williams, Hackaday Podcast

Elliot was praising a 2017 Supercon talk on infrared hacking that used software-defined radio tools with light as the carrier instead of radio waves. He argues light-modulated projects are a more accessible, unregulated cousin of radio hacking that few people have picked up.

Hackaday Podcast · 2026-10-30 Permalink → Listen →
Hackaday Podcast Around 58:36 into the episode
Elliot Williams

…a 50 megahertz carrier on it. That's no problem. So tons of bandwidth with light. And then they're modulating on top of that. And that was when it clicked in my head that, oh, this is actually just the same as radio, only using light that's turning off at 50 kilohertz instead of radio waves. You're

Jenny List

modulating a light beam in that respect with on-off key.

Elliot Williams

…But then you're putting a subcarrier on that and then you're modulating into that. Anyway, it's really cool. And for the low, low cost of basically nothing, you need an infrared diode, a fast amplifier, and then you plug that into GNU radio. You can do all of this kind of analysis and fancy protocol stuff on the sending side, all of this yourself. It's all super cheap, super affordable. And just light is a lot less tweaky than radio. You don't have to worry about any of those, you know, building. A damn radio transmitter, and it's not illegal to transmit light. You can transmit light however and wherever you want, and the FCC doesn't even come knocking on your door. So, I thought it was a really neat talk because it kind of inspired me to think about light-modulated stuff in the same way as radio and being maybe more accessible in a way. And I think I…

Jenny List

Well, certainly, using GNU Radio for more than just specifically radio as a general-purpose DSP package is incredibly underrated. I've been using GNU Radio for audio stuff for YONGS, and I can see that it would be a great thing for doing the signal processing for something that you then key onto an…

Elliot Williams

I want to see people transmitting analog TV streams over infrared. Oh,

Jenny List

that's doable. Like,

Speaker names come from our own diarization. The position is estimated from where the line sits in the episode.

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