Software Defined Radio with Arduino Nano

Arduino is a favorite toy for electronics enthusiasts. There are thousands of designs around these modules. Here’s the next one – the simplest and cheapest SDR receiver in the world! A “real” SDR radio is one where the RF signal received by the antenna is directly sampled by an analog-to-digital converter. Further processing of the […]

Terminal for non-contact body temperature measurement

The non-contact body temperature measurement terminal detects people with a fever that may be the result of COVID-19 infection. It has a unique face recognition algorithm, so it can be used to register people suspected of sickness and can be used to verify the identity of people and grant people the right to enter the […]

Winter 2021 in the Karkonosze Mountains

Winter in the Karkonosze Mountains is as picturesque as ever. The 2020/2021 season is different due to covid accommodation and ski bans. Fortunately, driving and hiking are still allowed, so who can go see the beautiful views and breathe the fresh air. The current temperature can always be checked at the Meteo-Karpacz station. Where to […]

The PW-Sat2 satellite completes the mission, preparations for the PW-Sat3 launch are in progress

The PW-Sat2 satellite completes the mission, preparations for the PW-Sat3 launch are in progress Polish student satellite PW-Sat2 tested the sail for deorbitation, took thousands of photos, collected a lot of data. In January / February, it will burn in the atmosphere, ending the mission. In 2023, the PW-Sat3 alternately in orbit, the choice of […]

ADALM-PLUTO clocker

In the post “ADALM-PLUTO development kit for (not only) Es’hail-2 satellite”, the topic of the 40 MHz clock generator for Adalm-Pluto and 25 MHz for the LNB satellite converter was considered. The problem of the 40 MHz clock generator is somewhat solved by replacing the original micro-module of the generator with a more stable one, […]

ZOOM application for teleconferences

In the era of a pandemic, it is worth not to lose personal contact and conduct meetings using the teleconference applications. One of them is Zoom, which in addition to team conversation, allows you to conduct computer presentations visible to all participants. Until now, zoom has made remote learning easier for all students. Despite the […]

Monitor for SG-Lab Power Amplifier

The 2.4 GHz 20W power amplifier from the Bulgarian company SG-Lab is widely used among the OMs (including QO-100 sattelite fans) [1]. In addition to the attractive price, this is also due to the excellent workmanship and delivery in the milled aluminum housing. The PA contains three internal directional couplers for measuring input, output and […]

N7DDC autotuner with power over coaxial cable

I made N7DDC popular ATU-100 antenna tuner in the basic version (5×5) in 2019, and I added my experience with it on our website in the post  CHA-250B antenna by SP5GNI. The original documentation of the ATU-100 tuner can be found on the Github portal as well as elsewhere (example). The schematic diagram can be […]

Non-contact body temperature measurement – COVID prophylaxis

The LB-669 thermometric gate is used for non-contact measurement of human body temperature, which allows for the detection of people potentially infected with the COVID-19 coronavirus. This stationary medical wall thermometer is fast, hygienic and safe as the measurement is non-contact, maintenance-free and automatic. The result of the measurement with a comment is read out […]

DMR communication in VOT

DMR (Digital Mobile Radio) is an intensely developing future-oriented amateur FM communication system in 2m and 70cm bands, with unlimited range, in which digital radios cooperate with digital repeaters linked by internet connections controlled by a servers system. Thanks to this, theoretically, if our radio is properly programmed with information about DMR network configuration, we […]