In search for some cheap and useful RF test hardware, I came by Geekcreit® Spectrum Analyzer USB LTDZ_35-4400M_Spectrum Signal Source with Tracking Source Module RF Frequency Domain Analysis Tool at sale price of aroundy $30/EURO30. It looked to have quite promising specifications: Attribute: RF frequency domain analysis tool Interface: usb Power supply: usb Standby current: →
https://blog.hackster.io/how-to-spot-pseudoscience-on-the-internet-e7d1f53796a2 There are many companies that make up some bogus pseudo scientific claims to sell products. This article gives an example about a company selling expensive stickers as solution for people afraid of the irrational “dangers of electromagnetic radiation”. The article lists the hallmarks of pseudo-scientific products for you to become a more savvy consumer. →
Is 5G completely safe and secure? Is 5G radiation more or less dangerous than currently used 2G/3G/4G? Just read this article and advice also other people to read (including two earler articles referenced). It tries to cover both the sides that say 5G is safe and 5G could potentially dangerous. But does it succeed in →
Last week when I visited Arrow IoT summit I saw Bluetooth location services in use. Two booth on the even showed Bluetooth positioning in two compartments. Quuppa Oy showed their own Bluetooth-based indoor positioning technology, which is used in many applications. With its unique Angle-of-Arrival (AoA) method and positioning algorithms, the system enables real-time tracking of →
https://www.americanradiohistory.com/Popular-Electronics-Guide.htm American Radio History site has Popular Electronics and a number of other 50′s-90′s electronics and computer magazines, all PDF. Includes the Experimenter’s Handbooks and several Ham Radio focused publications. There is also a Reference Book. Great collection of history for all of you that grew up with it and those that did not. →
https://www.edn.com/electronics-blogs/5g-waves/4461754/Does-5G-pose-health-risks—part-1- There has been some talk about 5G and health risks that range from hardly anything to frying your brain and controlling the population. This interesting article series is exploring the health risks posed by mmWave radiation onto humans. Millimeter wave (mmWave) frequencies extend from 30 GHz to 300 GHz. From the literature, there can →
https://www.theregister.co.uk/2019/03/11/eu_directive_ban_rf_radio_firmware_tinkering/ EU plans to ban the sale of user-moddable radio frequency devices – like phones and routers. The controversy centres on Article 3(3)(i) of the EU Radio Equipment Directive, which was passed into law back in 2014. →
https://swling.com/blog/2019/01/the-nsas-software-defined-radio-application-redhawk-is-now-open-source/ page says that NSA released a bunch of software to open source at https://code.nsa.gov/ There is an interesting looking project called “RedHawk” which is described as: “A software-defined radio (SDR) framework designed to support the development, deployment, and management of real-time software radio applications.” github link: https://github.com/redhawksdr Here’s the documentation: https://redhawksdr.github.io/Documentation/index.html →
https://predictabledesigns.com/wireless_technologies_bluetooth_wifi_zigbee_gsm_lte_lora_nb-iot_lte-m/ Deciding what type of wireless technology your new product should use can be an overwhelming task. This article has organized the various wireless technologies into a groups based on functionality, data speed, and operating range. This is a long, very detailed article. →
http://www.southgatearc.org/news/2018/october/led-lighting-can-disrupt-radio-communications.htm#.W9XAslNyg0M Dutch amateur radio society VERON reports the current EMC standard, developed in the last century, no longer suffices. “The faulty LED lights disrupt wireless connections in and around the house. Radiocommunications Agency therefore starts an investigation into 50 LED lamp suppliers.” “A number of lamps do not appear to meet the EMC standard. Especially →