RF

https://www.edn.com/electronics-blogs/si-pi-masterclass/4461028/Make-simple-fixtures-from-SMA-connectors For testing SMD components you need some test fixture. A fixed-geometry fixture produces consistent and repeatable results. This article tells how you can easily make fixed-geometry fixtures out of PCB-mounted SMA connectors. You can build a fixture to measure bypass capacitors using SMA-female edge-mount connectors. The narrow-base connectors (5 mm grid) and are best →

Remote powering implies that the power equipment is not local but some distance away. It is an alternative to commercial power, which can be hard to get and/or expensive. Remote means that the powering and powered equipment are in separate buildings or at different external locations inside same building. Line powering is a way to →

Hackaday article Spoofing Cell Networks with a USB to VGA Adapter tells that at OsmoDevCon [Steve Markgraf] released osmo-fl2k, a tool which allows transmit-only SDR through cheap USB 3.0 to VGA adapters based on the Fresco Logic FL2000 chip. Available through the usual overseas suppliers for as little has $5 USD. The claim is that these devices →

I needed a motion detector for Arduino. I saw a cheap Microwave Radar Induction Switch Human Motion Sensor Module at DX (similar also available at Banggood at pack of 5). It advertises High Sensitivity for Arduino, Long Sensing Distance, Wide Sensing Angle for Detecting Moving Objects. Using this is a microwave sensor module that specifically →

Ankaro SAT switcher 9×12 for antenna and satellite IF signals What is inside The construction looks like the input signals go to some kind of RF diode switch matrix. There are control ICs and output amplifier. Closeup →

https://blog.hackster.io/start-emulating-an-apple-i-on-your-tv-wirelessly-with-a-3-esp8266-80ba56a1e41f Apple’s first product, the Apple I, is now more than 40 years old. The processor was a MOS 6502 running at a mere 1MHz, and it only came with 4KB of memory.  Emulating the OS takes very little power. That last point is where the maker-favorite ESP8266 comes in. The ESP8266 can be purchased for as little →

I got a comment that recommended this RF BRIDGE 0.1 – 3000 MHz from http://www.transverters-store.com/rf_bridge/rf_bridge.html. It looked really interesting as I was planning to build something similar myself. The price was very reasonable ($10) so I had to test out it. Did the ordering, and quite quickly I received a letter from Ukraine that contained →

I have made many experiments with my DVB-T SDR stick. It can handle frequency range from around 30 MHz up to more than 1 GHz. There are cases, where there is need to receive lower frequencies. To make receiving those low frequencies with such cheap RTL-SDR receiving sticks, there are two approaches: using upconverter or →

As the popularity of IoT devices grow, it’s only natural that security holes in some of the systems will become apparent. IoT Devices May Be Susceptible to Replay Attacks with a Raspberry Pi and RTL-SDR Dongle andAttack Some Wireless Devices With A Raspberry Pi And An RTL-SDR articles tell that an easy way to make a →

http://www.edn.com/electronics-blogs/5g-waves/4458807/Five-technologies-for-building-5G?utm_content=buffer90279&utm_medium=social&utm_source=twitter.com&utm_campaign=buffer 5G is widely considered a mobile technology that won’t be available until perhaps 2020 or 2021, and even then, not widely.  Cisco predicts that by 2021, a 5G connection will generate 4.7 times more traffic than the average 4G connection. 5G will be a quantum leap from today’s LTE-Advanced networks.  →