Machine Vision Automates Trainspotting with Unique Full-Length Portraits
https://hackaday.com/2023/05/02/machine-vision-automates-trainspotting-with-unique-full-length-portraits/

As hobbies go, trainspotting is just as valid a choice as any — we don’t judge. But it does present certain logistical challenges, such as having to be in visual …read more (https://hackaday.com/2023/05/02/machine-vision-automates-trainspotting-with-unique-full-length-portraits/)

Modern Components Enable Cheap and Compact Nixie Driver Circuit
https://hackaday.com/2023/05/02/modern-components-enable-cheap-and-compact-nixie-driver-circuit/

Nixie tubes can add some retro flair to any project, but they can also complicate your electronics quite a bit: after all, you need to generate a voltage high enough …read more (https://hackaday.com/2023/05/02/modern-components-enable-cheap-and-compact-nixie-driver-circuit/)

Getting Ready for Act 2 of the Great American Eclipse
https://hackaday.com/2023/05/02/getting-ready-for-act-2-of-the-great-american-eclipse/

It seems like only yesterday that the “Great American Eclipse” swept from coast to coast, and for those who were lucky enough to watch it from along the path of …read more (https://hackaday.com/2023/05/02/getting-ready-for-act-2-of-the-great-american-eclipse/)

Op Amp Challenge: An Ultra-Cheap pH Sensor Amplifier
https://hackaday.com/2023/05/02/op-amp-challenge-an-ultra-cheap-ph-sensor-amplifier/

It’s rare in 2023 for an instrument to be entirely analog, instead it’s more normal for a front-end to feed the analog-to-digital converter (ADC) in a microcontroller. Typically the front-end …read more (https://hackaday.com/2023/05/02/op-amp-challenge-an-ultra-cheap-ph-sensor-amplifier/)

FET: Fun Endeavors Together
https://hackaday.com/2023/05/02/fet-fun-endeavors-together/

Last time, we’ve looked over FET basics, details, nuances and caveats. Basics aren’t all there is to FETs, however – let’s go through real-world uses, in all their wonderful variety! …read more (https://hackaday.com/2023/05/02/fet-fun-endeavors-together/)

Hackaday Prize 2023: Eye Tracking On a Budget
https://hackaday.com/2023/05/02/hackaday-prize-2023-eye-tracking-on-a-budget/

There is a lot to be learned from the experience of building something functional, and even better if doing so doesn’t break the bank. [Sergej Stoetzer]’s 20€ DIY-Eyetracker aims to …read more (https://hackaday.com/2023/05/02/hackaday-prize-2023-eye-tracking-on-a-budget/)

Electroosmotic Haptics for More Tactile Touch Devices
https://hackaday.com/2023/05/02/electroosmotic-haptics-for-more-tactile-touch-devices/