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Hello,   For the last week, I've been trying to get working a prototype of an IR thermometer, based on MLX90614. I ordered a DCC version, which means a 3 V power supply, medical accuracy (0,5 centigrade in 0 to 50 centigrade area), gradient compensated (compensates package temperature difference), 35 degrees field of view. My idea was to use it as a quick body thermometer, but also have to possibility to measure some interesting places from time to time - walls, windows, heating elements, ...
Hello,   Last time I wrote about a successful repair: Repair of a CNG boiler control board . This time, the repair didn't go well.   After about 12 years, our ADSL modem ASUS TI4631 stopped working. The ADSL connection didn't work and it was only possible to open the web management console, log in and see the home screen (with no useful information). All attempts to see the configuration, reset it (both software and hardware) didn't make the web interface to work.   So I opened ...
Hello,   I recently bought a Thunderboard Sense board from Silicon Labs. I don't want to repeat all the features (which you can find on the product page), but it provides various environmental sensors (air temperature and humidity, UV and ambient light, air pressure, TVOC for air quality, 6-axis intertial MEMS sensor and a MEMS microphone) connected to an EFR32 wireless SoC. The pre-programmed demo is capable of sending all the measured data from sensor (every 3 seconds I think) over Bluet ...
I created this blog post from the information I originally posted in this thread: If I Had a Hammer  made by jack.chaney56 .   1) Using Excel (or other spreadsheets) to compute/visualize the data. I will consider the STMicroelectronics  HTS221 as an example. The sensor outputs temperature and humidity in 16-bit registers in 2nd complement format I will now focus only on relative humidity measurement (the temperature is the same. The datasheet states that the output should be lin ...
Hello,   Recently, I've been playing with various sensors. I've been interested in measuring air temperature, humidity and pressure. (Didn't get a CO2 and dust sensor yet.)   I thought I could post just a simple idea how to test a range of a humidity sensor. For measuring humidity, I tried SHT21, SHT31 and HTS221 sensors.   The pictures below contain a reference design with SHT21.   Very low relative humidity What is needed: a small plastic bag with working sealing, sili ...
Hello, I noticed there is a new event combining Microchip's  PICs and click boards from MikroElektronika. https://www.mikroe.com/50-in-50-with-microchip-everything-you-need-is-just-a-click-away/?utm_source=homepage&utm_campaig… 50 project in 50 days, reminds me of 100 projects in 100 days with PSoc devices (almost 4 years ago). https://www.element14.com/community/message/75417/l/100-projects-in-100-days#75417   There is a chance to win some prizes, good luck David ...
In case you've never heard of it, there are still a few days to pick a Humble Book Bundle, stuffed with Arduino and Raspberry Pi books and magazines by Make.   It is a "pay what you want" model (with certain price levels to get all the books) and you decide where the money goes - the publisher, a charity of your choice and/or the Humble Bundle team.   Note 1 : only 5 days remaining. Note 2: this is not the first (and probably even last) books electronics-related bundle they made. ...
While browsing for construction ideas, I stumbled upon a construction by guys from MikroElectronika: https://www.hackster.io/16283/esp8266-mikroe-buggy-ccd102 So I put out an old metal construction kit I inherited from my father and built a "car" chassis. You can see the result under the original project, in Replications section.   What I like about this construction (I mean the DIY variant, not buying the original kit): easy to build (ca 1 - 2 hours including build the chassis) cheap ...