Author Archives: Marek Lewandowski

LEGO Spike Color Sensor (Prime or Essential)

The Spike Color Sensor is often used for tracking markings on the floor in activities like FLL or WRO challenges. It is important to understand, that the sensor has a certain size of a spot that it watches. To determine … Continue reading

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Straightening warped LEGO plates, twisted frames and bent axles

Recently I have purchased a second-hand LEGO set only to find some large, rare (as in: expensive to replace) parts WARPED. I searched the net and found several threads where people reported on similar issues, but no good solution. So … Continue reading

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Fixing LEGO Railroad switches / points

So you flip the LEGO switch on your LEGO Railroad system and… nothing happens. Or the switch moves half-way and stops. There is a post here: describing what I was facing recently. I found a better solution than described … Continue reading

Posted in LEGO, Powered Up | 4 Comments

Elgato Camlink 4k vs. China “HDMI to USB” converter

A lot was posted all over the internet about capturing HDMI output and whether CamLink is worth its $120 price tag since there are $20 alternatives out there. But as the other sources deal mainly with the image quality, I dig a bit into what the hardware differences are and why they are important too. Continue reading

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LEGO Classroom for EV3 bugs (Windows/Android)

Lego has released their Classroom app for Windows/Android. Which is great, as now you can actually do some serious programming on your Android tablet (previously you had to go for a full-fledged Windows system to get variables, custom blocks etc. … Continue reading

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