RF

SDR videos

Software-defined radio (SDR) technology can be used for many interesting technical experiments. With listening only SDR you can do many interesting things, but having a SDR that can also transmit opens many new doors. Here are some interesting videos related to SDR and cyber security: Universal Radio Hacker – Replay Attack With HackRF Download here:

WRC 19 Wrap-up: Additional spectrum allocations agreed for IMT-2020 (5G mobile)

https://techblog.comsoc.org/2019/11/22/wrc-19-wrap-up-additional-spectrum-allocations-agreed-for-imt-2020-5g-mobile/ WRC-19 identified additional globally harmonized (millimetre wave) frequency bands for International Mobile Telecommunications (IMT), including IMT-2020 (otherwise known as 5G mobile). Frequency bands 24.25-27.5 GHz, 37-43.5 GHz, 45.5-47 GHz, 47.2-48.2 and 66-71 GHz are allocated for the deployment of 5G networks. In total, 17.25 GHz of spectrum has been identified for IMT by the

2in1 Wireless and Wired Microphone

I got a very cheap wired/wireless mic  from Wish.com. I plan was to have a cheap “disposable” microphone for uses where I don’t want risking the more expensive microphone. Basically the product looks OK. The construction is plastic, but till feels acceptable for the price (less than 10 Euros on sale). If I get this

Battery for NanoVNA

I had earlier written about NanoVNA and how the device I got came without battery. The device supports rechargeable LiPo batteries, but the batteries are not included on the model I bought because of the safety of international transportation. I also liked to have the LiPo battery installed on my device. The device has battery

Testing NanoVNA

NanoVNA is very tiny handheld Vector Network Analyzer (VNA). A vector network analyzer (VNA) is an instrument that can be used to measure antenna or coax parameters such as SWR, impedance and loss. It can also be used to characterize and tune filters. It is a very useful tool to have if you are building

NanoVNA handheld Vector Network Analyzer (VNA)

NanoVNA is a small handheld Vector Network Analyzer (VNA). It is equippedwith lcd display, portable device with battery(battery not included). This project aim to provide an RF gadget but useful instrument for enthusiast. The device hardware offers 50k-300MHz frequency range that can be expended up to 900 MHz (with somewhat less dynamics on higher frequencies).

Cheap spectrum analyzer and signal generator

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:

How to Spot Pseudoscience on the Internet – Hackster Blog

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.

Bluetooth 5.1 location technology demo

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