Personal pride, rejection of mass consumption, economy, participation in a social project, or creation of a unique object … the reasons for the success of Do It Yourself are many and varied. Associated with this DIY culture, the Maker movement is no stranger to 3D printing, having primarily participated in the democratization of this technology, thanks to the RepRap(Replication Rapid-prototyper) project.
Initiated in 2005 by Adrien Bowyer, then a senior lecturer in mechanical engineering, this innovative project aimed at creating a self-replicating and free machine gave birth to the number of 3D printers we use today (Printrbot, Ultimaker, Makerbot ..).
“This mini thermal camera can detect the surface temperature of objects”
Driven by a state of mind midway between crafts and new technologies, the makers have quickly adapted 3D printing, an increasingly affordable tool, synonymous with customization and design flexibility. Perfectly illustrating this trend, brothers Pedro and Noe Ruiz, two passionate creators of electronics officiating at the famous Adafruit, have just published a new project on the manufacture of a thermal imaging camera in 3D.
” This mini thermal camera can detect the surface temperature of objects and display them as a colored heat map .” Explain the Ruiz brothers. ” Temperatures are displayed in real-time and posted in different colors to form a heat map. “
“The speaker has a kawaii aesthetic that is both simplistic and elegant”
While this kind of device may seem quite technical, the Ruiz brothers have found not only a way to make the project feasible for mid-level makers but also to turn a thermal camera into a more affordable and design product. A look ” inspired by the classic Diana Toy Camera ” highlights the famous duo. ” The speaker has a kawaii aesthetic that is both simplistic and elegant .”
For this project as unusual as it is colorful, several electronic components are required, including a 2.4 inch TFT screen, a thermal camera sensor (the Adafruit AMG8833 sensors are recommended for their compatibility with Arduino), a HUZZAH32 Feather and slide switch. The rest of the material consists of screws, stickers, putty, and solder wire.
While the relatively simple 3D printed components (see above) were manufactured on an Ultimaker 2+ and three 3D printers, using FDM technology is the answer.
For those who do not have the chance to own a 3D printer, there are, of course, all kinds of affordable alternatives such as fab labs or 3D printing services.
Regarding materials, the Ruiz brothers reveal that they have used six filaments of different PLA-type colors from the MeltInk3D brand. The makers, and this is also the interest of 3D printing, can, of course, choose and combine their colors. Designed on the first Fusion 360 authoring software, the eight models can be downloaded from Thingiverse.
The main element of the device, the thermal sensor, is proposed on Adafruit at a very affordable. Manufactured by the Japanese electronics giant Panasonic, this sensor is capable of measuring temperatures from 0 ° C to 80 ° C (32 ° F to 176 ° F) with an accuracy of + – 2.5 ° C (4 ° C to 80 ° C). , 5 ° F), and can detect a human up to 7 meters away.
Also known as a thermographic camera, a thermal imaging camera is useful in many situations, such as the detection of weak points in the insulation of a building, the verification of the temperatures of pipes and heating installations, or the discovery of people with a suspicious fever at airports.
Cut the film negative into two pieces. They must be square and have approximately the size of a coin.
Disarm your digital camera. If you have screws, you can use a Phillips screwdriver. Otherwise, you will have to use a flat edge, like a flat screwdriver to do this. You should use an economical camera for this since you will not be able to use it again as a regular camera. A webcam works very well for this.
Find the CCD (charged coupler device – charging device attached). This is the device that is responsible for registering the photograph. It will be located behind the lens. It is square-shaped and will have a piece of glass or red plastic attached to it. This part is the infrared filter.
Remove the infrared filter. You will have to pry gently using the flat edge. Be careful not to damage the CCD during the process.
Replace the filter with the film negative. Do this by adding a little glue to the negative and pressing it firmly on the CCD filter. Wait for it to dry.
Reassemble the camera and adjust all its screws. If you are using a webcam, you will have to paste it.
Take a picture with your infrared camera. Do this in an entirely (or almost) dark room with people or animals inside. You will get an image with green, yellow, and orange tones.