All posts by kobaan

Hardware

Electronic microscope 7 inch Andonstar AD407

Since I intend to do more SMD soldering in the future, and I also want to offer my kids some insights into the microcosm, I decided to buy a microscope with a rather big screen plus HDMI output.

I chose the Andonstar AD407 with a 7 inch creen, SD card picture and video recording. Up to 270x at 2160p resolution, 4megapixel sensor.
Fine for electronics, and up to dust/hair size discovery, not enough for biological stuff.

Hardware, SigInt

NoElec SMArt v4 SDR


For my ADSB tracking of planes I needed another cheaper solution instead of blocking my HackRF all the time.

I chose the Nooelec SMArt v4 SDR as a compact, affordable entry into software-defined radio experimentation. This upgraded RTL-SDR dongle offers:

  1. Enhanced Performance: Equipped with the R820T2 tuner and improved filtering, it covers 24 MHz to 1700 MHz (extendable via direct sampling) with reduced noise and better sensitivity compared to older RTL-SDR models.
  2. TCXO Stability: The onboard temperature-compensated crystal oscillator ensures reliable frequency accuracy (critical for decoding narrowband signals like aircraft ADS-B or digital voice).
  3. Plug-and-Play Simplicity: USB-powered, no external power supply needed—perfect for quick setups in the field or on-the-go monitoring of FM radio, weather satellites, marine traffic, or IoT protocols.
  4. Versatile Applications: Ideal for amateur radio experimentation, spectrum analysis, reverse-engineering wireless signals (e.g., garage door openers, sensors), and learning RF fundamentals without breaking the bank.

Why It Stands Out: Compared to pricier SDRs like HackRF One, the SMArt v4 balances cost and capability—making it a no-brainer for hobbyists or professionals needing a lightweight, receive-only tool for everyday signal exploration. Its robust build quality and compatibility with GNU Radio, HDSDR, and other platforms solidify its role as my go-to SDR companion.

Hardware

My first 3D pen

Bought a 3D pen at Banggood for 15Euro, what can go wrong right ?

Fantastic, all included even some 1.75mm filament and power supply…

pretty good to fix some minor issues or do super fast critical fixing on messed up support for 3D prints

Definitely a thumbs up product.