Twisted wire lengths, 22pF filters, a fully isolated bench setup, a grounded foil wrap and power taken from different pads. None of it moved the satellite count. So I unsoldered everything and put a GEPRC Taker G4 35A in instead, which fixed the GPS, unlocked 4S, and left me wondering whether the result is still a Pavo20.

My third radio, and the first one I chose for a reason that never appears in a review: it fits in the top box of a GS Adventure alongside two drones, goggles and batteries. What the six customisable function switches actually enable, and where the GX12 loses to a Boxer.

With the spectrometer alignment sorted and PySpectrometer3 taking shape, the obvious next experiment was UV fluorescence. Minerals, biological samples, gemstones — a lot of interesting chemistry shows up as emission spectra under UV excitation that you'd never see under white light. The setup is conceptually simple: …

Still trying to solve the monitor calibration problem — need to measure the actual spectral output of my monitor's primaries, not just RGB. The CR30 held against the screen gives something, but it's not designed for emissive sources. What I need is the pocket jewel spectroscope I've been using all along, properly …

The Pavo20 Pro II is a capable 2.5" whoop — compact, powerful, with a good camera and a surprisingly solid video link even on linear whip antennas. I wanted it as a mountain trip quad: something that fits in a jacket pocket, dives canyons, and has GPS Rescue as a genuine safety net. GPS is not included; I added a …

After successfully reverse engineering the CR30 colorimeter, I found myself wanting something more versatile - a device that could not only measure reflected light but also handle transmittance measurements with fiber optic coupling. The result is this compact, portable visible light spectrometer built around a …

So here I am, a physicist who got bitten by the color science bug. What started as innocent curiosity about how light works has turned into a full-blown obsession with spectrometers, colorimeters, and now... laser power meters. You know how it goes - you start with one simple question and before you know it, you're …

One day my DS420+ just died. Well, not completely dead - it powered on, fans spun up, disks spun up too, blue LED blinked... but that was it. No network, no beeps, nothing. Just an expensive paperweight with my data trapped inside. Initial Diagnostics First thing I tried was removing all the drives. Sometimes a bad …

I've always been fascinated by the intersection of hardware and software, especially when it comes to understanding how devices communicate. Recently, I developed a need for monitor calibration as well as properly color correct my photos. I've been looking at X-Rite, Datacolor and other calibration devices and am on …