Yagi–Uda antenna is a directional and pretty effective antenna consisting of multiple parallel elements in a line, usually half-wave dipoles made of metal rods. The Best-known use of this type of antenna is as rooftop terrestrial television antennas, but it is also used for point-to-point fixed communication links and long-distance shortwave communication by shortwave broadcasting stations and radio amateurs. This…
Author: Oleg Kutkov
Converting DSLR RAW images into scientific FITS format. Part 1: UI
FITS is an open standard defining a digital file format useful for storing, transmitting, and processing scientific and other images. FITS is the most commonly used digital file format in astronomy. Unlike many image formats, FITS is designed specifically for scientific data and hence includes many provisions for describing photometric and spatial calibration information, together with image origin metadata. (Wikipedia…
Connecting MLX90614 infrared thermometer to the Raspberry PI
MLX90614 is a cheap and popular infrared thermometer from Melexis. This device is made in different versions for different purposes. You can get a general-purpose version with 0.5 accuracies or for medical purposes with accuracy up to 0.2. Also, you can choose the voltage you need: 3.3v or 5v versions are available. With MLX90614, you can distantly measure the objects’…