Do Your Research
https://hackaday.com/2024/07/20/do-your-research/

We were talking about a sweet hack this week, wherein [Alex] busts the encryption for his IP web cam firmware so that he can modify it later. He got a …read more (https://hackaday.com/2024/07/20/do-your-research/)

2024 Business Card Challenge: CardTunes Bluetooth Speaker
https://hackaday.com/2024/07/20/2024-business-card-challenge-cardtunes-bluetooth-speaker/

A business card form factor can be quite limiting, but that didn’t stop [Schwimmflugel] from creating CardTunes, an ESP32-based Bluetooth audio speaker that tried something innovative to deliver the output. …read more (https://hackaday.com/2024/07/20/2024-business-card-challenge-cardtunes-bluetooth-speaker/)

This Vintage Computing Device is No Baby Food
https://hackaday.com/2024/07/20/this-vintage-computing-device-is-no-baby-food/

Today, if you want a computer for a particular task, you go shopping. But in the early days of computing, exotic applications needed custom computers. What’s more is that with …read more (https://hackaday.com/2024/07/20/this-vintage-computing-device-is-no-baby-food/)

New Additive Manufacturing Contenders: HIP and Centrifugal Printing
https://hackaday.com/2024/07/20/new-additive-manufacturing-contenders-hip-and-centrifugal-printing/

Additive Manufacturing (AM) is a field of ever-growing importance, with many startups and existing companies seeking to either improve on existing AM technologies or market new approaches. At the RAPID …read more (https://hackaday.com/2024/07/20/new-additive-manufacturing-contenders-hip-and-centrifugal-printing/)

Working Through The Art of Electronics Exercises
https://hackaday.com/2024/07/20/working-through-the-art-of-electronics-exercises/

[The Engineering Experience] has an ambitious series of videos. He’s working through circuit examples from the awesome book “The Art of Electronics.” In the latest installment, he’s looking at a …read more (https://hackaday.com/2024/07/20/working-through-the-art-of-electronics-exercises/)

Using Femtosecond Laser Pulses to Induce Metastable Hidden States in Magnetite
https://hackaday.com/2024/07/20/using-femtosecond-laser-pulses-to-induce-metastable-hidden-states-in-magnetite/

Sketch of the UED setup at EPFL, 1) Electron gun, 2) High-Voltage connector, 3) Photo-cathode, 4) Anode, 5) Collimating solenoid, 6) Steering plates, 7) Focusing solenoid, 8) RF cavity, 9) Sample holder, 10) Cryostat, 11) Electron detector, 12) Turbo pump, 13) Ion gauge. Credit: Proceedings of the National Academy of Sciences (2024). DOI: 10.1073/pnas.2316438121
" data-medium-file="https://hackaday.com/wp-content/uploads/2024/07/magnetite_hidden_states_controlling-electronic.jpg?w=400" data-large-file="https://hackaday.com/wp-content/uploads/2024/07/magnetite_hidden_states_controlling-electronic.jpg?w=800" tabindex="0" role="button">Hidden states are a fascinating aspect of matter, as these can not normally be reached via natural processes (i.e. non-ergodic), but we can establish them using laser photoexcitation. Although these …read more (https://hackaday.com/2024/07/20/using-femtosecond-laser-pulses-to-induce-metastable-hidden-states-in-magnetite/)

All About PNP Transistors
https://hackaday.com/2024/07/21/all-about-pnp-transistors/

In the early days, PNP bipolar transistors were common, but the bulk of circuits you see today use NPN transistors. As [Aaron Danner] points out, many people think PNP transistors …read more (https://hackaday.com/2024/07/21/all-about-pnp-transistors/)