DIY Thermal Camera That’s Better And Cheaper Than a FLIR

A few years ago, FLIR unleashed a new line of handheld thermal imagers upon the world. In a manufacturing triumph, the cheapest of these thermal imaging cameras contained the same circuitry as the one that cost six times as much. Much hacking ensued. Once FLIR figured out the people who would be most likely to own a thermal imaging camera can figure out how to upload firmware, the party was over. That doesn’t mean we’re stuck with crippled thermal imaging cameras, though: we can build our own, with better specs than what the big boys are selling.

[Max] has been working on his DIY thermal imager for a while now. We first saw it about a year ago, and the results were impressive. This thermal camera is built around the FLIR Lepton sensor, providing thermal images with a resolution of 60 by 80 pixels. These thermal images were combined with a VGA resolution camera to produce the very cool enhanced imagery the commercial unit will get you. There’s also a 1/4-20 threaded insert on the bottom of [Max]’s version, making it far more useful in any experimental setup.

Now [Max] has unleashed his DIY Thermocam on the world of Open Hardware, and anyone can build their own for about €400 (about $425). The components required for this build include a FLIR Lepton sensor easily sourced from the Digikey or GroupGets, an Arducam Mini, a Teensy 3.6, and a mishmash of components that are probably kicking around your parts drawers.

If you want an overview of this project before digging in, [Max] has a project overview (PDF warning) going over the build. This is one of the better DIY projects we’ve seen recently, and the documentation is fantastic. If you’re thinking about buying one of those fancy thermal imaging cameras, here you go — this one is just as good and half off.

A Big 3D Printer Built Using The Power of Procrastination

When we wrote about [Dan Beaven]’s resin printer a while back he enthusiastically ensured us that, thanks to the recent wave of attention, he would finally finish the project. That’s why today we are covering his entirely unrelated 2 cubic foot print volume FDM printer. 

As we mentioned, [Dan] is no stranger to 3D printers. His addiction has progressed so far that he needs bigger and bigger parts, but when he looked at the price of printers that could sate his thirst… it wasn’t good. We assume this is the time he decided to leverage his resin printer procrastination to build a massive printer for himself.

The frame is aluminum extrusion. The bed is an 1/4″ thick aluminum plate supported just a little bit in from each corner. He can use the 4 motors to level the platform, which is a killer feature on a machine this big. More or less it’s fairly standard mechanically.

We are interested in his interesting addition of a FLIR thermal sensor to see live heat distribution. We also applaud him on his redundant safety systems (such as a smoke sensor that’s separately powered from the machine).

All the files are available on his site if you’re procrastinating on something and would like one for yourself.

Roomba Now Able to Hunt Arnold Schwarzenegger

Ever since the Roomba was invented, humanity has been one step closer to a Jetsons-style future with robots performing all of our tedious tasks for us. The platform is so ubiquitous and popular with the hardware hacking community that almost anything that could be put on a Roomba has been done already, with one major exception: a Roomba with heat vision. Thanks to [marcelvarallo], though, there’s now a Roomba with almost all of the capabilities of the Predator.

The Roomba isn’t just sporting an infrared camera, though. This Roomba comes fully equipped with a Raspberry Pi for wireless connectivity, audio in and out, video streaming from a webcam (and the FLiR infrared camera), and control over the motors. Everything is wired to the internal battery which allows for automatic recharging, but the impressive part of this build is that it’s all done in a non-destructive way so that the Roomba can be reverted back to a normal vacuum cleaner if the need arises.

If sweeping a just the right time the heat camera might be the key to the messy problem we discussed on Wednesday.

The only thing stopping this from hunting humans is the addition of some sort of weapons. Perhaps this sentry gun or maybe some exploding rope. And, if you don’t want your vacuum cleaner to turn into a weapon of mass destruction, maybe you could just turn yours into a DJ.

Hackaday Reviews: Flir One Android

The Flir One thermal camera caused quite a stir when it was launched back in 2014. Both the Flir One and its prime competitor Seek Thermal represented the first “cheap” thermal cameras available to the public. At the heart of the Flir One was the Lepton module, which could be purchased directly from Flir Systems, but only in quantity. [Mike Harrison] jumped on board early, cutting into his Flir One and reverse engineering the Lepton module within, including the SPI data required to talk to it. He even managed to create the world’s smallest thermal imager using a the TFT screen from an Ipod Nano.

flircamA few things have changed since then. You can buy Lepton modules in single quantity at DigiKey now. Flir also introduced a second generation of the Flir One. This device contains an updated version of the Lepton. The new version has a resolution of 160 x 120 pixels, doubled from the original module. There are two flavors: The iOS version with a lightning port, and an Android version with a micro USB connector. I’m an Android user myself, so this review focuses on the Android edition.

The module itself is smaller than I expected. It comes with a snap-on case and a lanyard. While you’ll look a bit like a dork wearing the lanyard, it does come in handy to keep the imager from getting lost or dropped. The Flir One has an internal battery, which of course needs to be topped off before it can be used. Mine charged up in about half an hour.

Continue reading “Hackaday Reviews: Flir One Android”

Build Your Own Thermal Camera

We have featured thermal camera projects by [Max Ritter] before, but [Max] has just taken the next step: he is offering the latest version as a build-it-yourself kit. The DIY Thermocam improves on his previous designs by capturing 60 by 80 pixel thermal images, which can be combined with visible light images from an accompanying  640 by 480 pixel camera to produce the final image. It is built around the FLIR Lepton module that has been used in many of the recent commercial thermal cameras that we have seen. Max has also added a battery and display, making the whole thing a standalone camera.

The firmware that runs all this is open-source and written in C++ for easy modification, so users can build their own thermal camera.”The approach is to offer people the self-assembly kit so that they can use it as a development platform to do whatever they want to achieve with thermal imaging”[Max] told us. The kit runs €429 (about $468), with free shipping worldwide.

Continue reading “Build Your Own Thermal Camera”

Hackaday Links: May 31, 2015

Back in the mid-70s, [Paul Horowitz] (who has an incredible Wikipedia entry, by the way) started teaching Physics 123 at Harvard. Simple electronic circuits, solving problems with silicon; simple stuff like that. His lecture and lab notes started getting a following, and after Xeroxing a few dozen copies, he realized he had written a book. It was The Art of Electronics, and Ladyada interviewed this master of hand drawn schematics. A great interview and great camera work, too.

Like hackathons? How about one at CERN? It’s happening October 2 through October 4. The aim this year is to have a humanitarian and social impact thanks to technology. The projects last year were very good; everything from cosmic ray detectors to a $10 inflatable fridge for field operations.

You want viral advertising for your movie? This is how you do viral advertising for your movie. It’s Hackerman’s Hacking Tutorials, and we’d really like to know how they did the 80s graphics with modern computers. It’s not like you can just go out and buy a Video Toaster these days…

Previously available only through group buys, the Flir Lepton module is now available at Digikey.

We have hit the singularity. We have stared into the abyss, and the abyss has stared into us. There was a kickstarter to fund a trailer for another, bigger kickstarter. Relevant xkcd right here.

The Tymkrs had a lamb roast, and what better way to do that than with a huge lathe? Put some charcoal on the ways, turn it at a low RPM, and eventually you’ll have a meal. Bonus points for the leaf blower manifold, a gold star for carving it with a sawzall.

Hacklet 47 – Thermal Imaging Projects

Thermal imaging is the science of converting the heat signature of objects to an image visible to humans. Everything above absolute 0 gives off some heat, and thermal imagers allow us to see that – even if there is no visible light in the room. Historically, thermal imaging systems have been large and expensive. Early systems required liquid nitrogen cooling for their bolometer sensors. Recent electronic advances have brought the price of a thermal image system from the stratosphere into the sub $300 range – right about where makers and hackers can jump in. That’s exactly what’s happened with the Flir Lepton module and the Seek Thermal camera. This week’s Hacklet is all about thermal imaging projects on!

We start with [Pure Engineering] and Flir Lepton Thermal Camera Breakout. Flir’s Lepton thermal camera created quite a stir last year when it debuted in the Flir One thermal iPhone camera. The Lepton module used in the Flir One is a great standalone unit. Interfacing only requires an I2C interface for setup and an SPI interface for image data transfer. Actually using the Lepton is a bit more of a challenge, mainly because of its packaging. [Pure Engineering] made a simple breakout board which makes using the Lepton easy. It’s also breadboard compatible – which is a huge plus in the early phases of any project.


grideyeNext up is [AKA] with GRID-EYE BLE-capable thermal camera. This project is a Bluetooth low energy (BLE) thermal camera using Panasonic’s Grid-EYE 64 pixel thermal sensor. 64 pixels may not sound like much, but an 8×8 grid is enough data to see quite a bit of temperature variation. If you don’t believe it, check the project page for a video of [AKA] using Grid-EYE’s on-board OLED display. Grid-EYE was a Hackaday Prize 2014 semifinalist, and we featured a bio on [AKA] last year. The only hard part with building your own Grid-EYE is getting the sensor itself. Panasonic doesn’t sell them to just anyone, so you might have to jump through a few hoops to get your own.


pylepton[Kurt Kiefer] brought the FLIR Lepton to the Raspberry Pi with pylepton video overlay. This project uses the Lepton to overlay thermal data with images captured by the Raspbery Pi camera module. The Lepton interfaces through the I2C and SPI ports on the Pi’s GPIO pins. The results are some ghostly images of black and white thermal views over color camera images – perfect for your next ghost hunting expedition!  The entire project is implemented in Python, so it’s easy to import and use pylepton in your own projects. [Kurt] even gives an example of capturing an image with just 5 lines of code. Nice work, [Kurt]!



wificamFinally we have [Erik Beall] with WiFi Thermal Camera. [Eric] is using an 82×62 diode array to create thermal images. Unlike microbolometer sensors, diode/thermopile sensors don’t need constant calibration. They also are sturdier than Microelectricomechanical System (MEMS) based devices. This particular project users an array from Heimann Sensor. As the name implies, the sensor is paired with a WiFi radio, which makes using it to capture and display data easy. [Erik] must be doing something right, as WiFi Thermal Camera just finished a very successful Kickstarter, raising $143,126 on a $40,000 initial goal.

Are you inspired? A thermal imager can be used to detect heat loss in buildings, or heat generated by electrical faults – which means it would be a great project for the 2015 Hackaday Prize! If you want to see more thermal imaging projects, check out the thermal imaging projects list!

That’s it for this week’s Hacklet, As always, see you next week. Same hack time, same hack channel, bringing you the best of!