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DIY-Thermocam: A low-cost thermal imager based on the FLIR Lepton sensor

diy-thermocam.net

71–80 of 97 posts

Re: DIY-Thermocam: A low-cost thermal imager based on the FLIR Lepton sensor

#71
post #67
post #63

Earlier quoted context omitted.

How did you match up a lens for this?

One of the European sellers of the camera (Eleshop) sells a lens and 3d printed holder. I just bought the same lens and 3d printed a holder myself, from what I remember someone on the eevblog linked a suitable one.

Oh, ok. Thanks

Re: DIY-Thermocam: A low-cost thermal imager based on the FLIR Lepton sensor

#72
Somewhat related: FLIR sold a handheld model back in 2013—the E4—that had the same electronics and sensors as their high-end E8 model. The E4’s firmware was originally unencrypted, so some enterprising folks quickly figured out how to turn the 80x60 E4 (~$1000) into a 320x240 E8 (~$6000). As in, functionality, resolution, and performance were indistinguishable between a modded E4 and a retail E8. They didn’t even bin the larger sensors, they literally just used flags to determine the capabilities that would be exposed to the end user. I still have that camera. :) Hackaday article from that time: https://hackaday.com/2013/11/04/manufacturer-crippled-flir-e...

Re: DIY-Thermocam: A low-cost thermal imager based on the FLIR Lepton sensor

#74

Strongly suggest looking into Guide T120 PC210 (resolution 256x192) see this eevblog review: https://www.eevblog.com/forum/thermal-imaging/guide-pc210-re... It can save JPG with temperature info, and also stream video to PC. I got it last year from AliExpress for around 299-350 USD and prefer it over the more expensive FLIR TG267.

UTi260B is also a good option, price swing between $260-$360 depending on time.

Re: DIY-Thermocam: A low-cost thermal imager based on the FLIR Lepton sensor

#75
post #47

Earlier quoted context omitted.

The very first line of the "Building" page states: > The DIY-Thermocam V3 Kit from GroupGets contains all required parts to build the device: One has to scroll below the image to see a suggestion that the FLIR sensor and breakout board are not included in the kit. The groupgets page is more clear, but even there one has to scroll to very far down before one finds: > The DIY-Thermocam V3 self-assembly KIT contains all…

Thanks for the feedback, it was indeed missleading to write it like that. I have improved the text as you have proposed it, so it is much clearer now what is required :)

Thank you, yes, your improved text is now explicitly clear as to what is and is not included in the kit. No one should become confused over the improved version of the text.

Re: DIY-Thermocam: A low-cost thermal imager based on the FLIR Lepton sensor

#76
post #60
post #55

Earlier quoted context omitted.

i think the google shuttle thing and tinytapeout are only for digital chips, not even analog i was thinking of directly measuring rc fall times for the keyboard multiplexer rather than running free oscillators relaxation oscillators will give you a lot of harmonics, might be good or bad

https://www.youtube.com/watch?v=CSZm3q4rUBg Above is a seminar on analog layout designed to target Tiny Tapeout that went over Magic (by Jonathan Edwards) and Klayout (Thomas Perry). Sky130 and tinytapeout can do analog, but most of the tools and the examples are digital based. https://i.imgur.com/NespRr4.png https://www.klayout.de/forum/discussion/1879/video-demo-of-a...

oh fantastic, do you mean subtext jonathan edwards? i had no idea he was doing hardware

i thought the google shuttle program connected your design to the outside world through some kind of digital bullshit

Re: DIY-Thermocam: A low-cost thermal imager based on the FLIR Lepton sensor

#77

Somewhat related: FLIR sold a handheld model back in 2013—the E4—that had the same electronics and sensors as their high-end E8 model. The E4’s firmware was originally unencrypted, so some enterprising folks quickly figured out how to turn the 80x60 E4 (~$1000) into a 320x240 E8 (~$6000). As in, functionality, resolution, and performance were indistinguishable between a modded E4 and a retail E8. They didn’t even bin…

Not nearly as cool, but rigol’s 1xx4 series had similar bypassable firmware restrictions. For a broke college student being able to get a 100mhz 4-channel scope (the class equipment was only 2 channel) for a few hundred bucks really simplified a lot of labs. I suspect the firmware protections were purposefully weak knowing it would gain cred with budding EEs.

Re: DIY-Thermocam: A low-cost thermal imager based on the FLIR Lepton sensor

#78
post #54

"Low cost" is still 300 bucks. That's very expensive. I wish this tech would come down a bit so it would enable a whole new range of applications that weren't possible before due to the price.

It's also lowish-cost for the field and is possible because the tech has come down quite a bit , which enabled a whole new range of applications that weren't possible before due to price. ;) But I assume the chinese parts at least will continue to become cheaper, although afaik they are currently not as available as individual parts vs complete devices.

It's been around this price for around 5 years at least, or more. Since the FLIR one came out really.

Re: DIY-Thermocam: A low-cost thermal imager based on the FLIR Lepton sensor

#79

Excellent specs and design, good value. Somewhat off-topic, but if you want to get into thermal imaging for super cheap (albeit at a lower resolution again), you can get a compact FLIR kit from M5stack for $79 that's ready to use as soon as you charge it, but also freely hackable. https://shop.m5stack.com/collections/m5stack-new-arrival/pro...

MLX90640-BAA is an interesting sensor.

Adafruit’s breakout sounds interesting, like enough for a homemade AIM9

This sensor contains a 24x32 array of IR thermal sensors. When connected to your microcontroller (or Raspberry Pi) it will return an array of 768 individual infrared temperature readings over I2C. . . . This version has a wide 110°x70° field of view we also have a version with a narrower 55°x35° field of view. . . This version has a wide 110°x70° field of view we also have a version with a narrower 55°x35° field of view

https://www.adafruit.com/product/4469?gclid=Cj0KCQjwmN2iBhCr...

Early AIM9 explained: https://medium.com/@OpenSeason/1946-germany-has-been-defeate...

Re: DIY-Thermocam: A low-cost thermal imager based on the FLIR Lepton sensor

#80
post #62

I've been working on a lepton project for about 5 months. The resources for examples and debugging are scarce and I don't have a lot of time to spend on it. It should be much cheaper than this using an ESP32. I haven't gotten it to work though. I did get it working (but choppy) on a Pi Zero. I might be able to get it working smoothly if I wanted to trim down some of the other processes and prioritize this one. But th…

Was your software running bare metal or with an OS?
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