QuadMeUp – FPV drones and stuff

  • JWT claims explained – registered, public and private

    JWT, the JSON Web Tokens are a standarized (RFC 7519) way of passing the user’s identity between microservices. Internally, the JWT payload is just a JSON with pertially standarized fields. They are called claims. Some of the claims are defined in the RFC 7519 while some are free to use and abuse freely. The video…

  • What are JWT tokens? Modern authentication and authorization for microservices

    JSON Web Tokens, or JWT, are a great and modern way to handle User identity, authentication, and authorizations. All modern user management systems like Keycloak, AWS Cognito, or Auth0 are issuing JWT tokens! And remember, with microservices, session-based authentication and authorization is a no-go.

  • NFTs does not work like you think they do | NFT for beginners

    Have you heard about this picture of a monkey sold as an NFT for more than 2 million dollars? Crazy. Everybody gets that NFTs (Non Fungible Tokens) are secure and work based on blockchain. Most don’t get what exactly that means. Because no, having an NFT is not proof that you legally own something. Or…

  • How BAD are cheap 18650 Li-Ion batteries from China?

    China is a magical place where you can get everything for a fraction of a price. Like 10000mAh 18650 LiIon batteries for $1.5. Of course, we have to begin with a note, that there are no 10000mAh 18650 batteries! Technology does not allow for such energy density. And if they would exist, they would not…

  • Colorfabb LW-PLA Light Filament

    There are many 3D printing filaments to choose from. Each of them has its own specific features: PLA is simple and easy to use, PET-G has more temperature resistance, Polypropylene can be bent and TPU is indestructible. If you look for a filament that gives the lightest prints, there is only one option: foamed PLA…

  • BlHeli Motor Timing Explained

    What is motor timing? You can change it in the BlHeli configurator, but what does it do? Many tutorials say that you should increase Motor Timing. What is the gain of doing so? And why is it in degrees (at least in BLHeli_32)? The short answer is: higher timing equals slightly more torque but less…

  • Can you sell Open-Source software?

    Many companies are afraid of Open-Source software. There are myths and misunderstandings. One of them is: can I sell open source (GPL, MIT, Apache License) to my clients? The answer is both yes and no. There is nothing that prohibits issuing an invoice for Open-Source software. However, license transfer can be tricky. You will learn…

  • GoPro Media Mod microphone quality

    GoPro makes great action cameras. Small, tough, with image stabilization and other cool features. For some time now, they can be used also for more “professional”, cinematic purposes. I’m recording quite a lot of my videos with the help of GoPro Hero camera. Previously with Hero 7 and Hero 8. Now with the Hero 10.…

  • GoPro Hero 10 Black

    GoPro Hero 10 Black

    GoPro releases the new action camera every year. Usually around September. This year was no different and only a few weeks ago we’ve been presented the anniversary release: GoPro Hero 10 Black. I purchased my Hero 10 a few days after the premiere. My target usage for this GoPro was: I need a smaller camera…