[Perinski]’s design for a mechanical flux dispenser uses some common hardware and a few 3D printed parts to create a syringe with fine control over just how much of the …read more (https://hackaday.com/2021/12/17/diy-mechanical-flux-dispenser-syringe-has-fine-control/)

Simple Mods Turn 3D Printer into Electrochemical Metal Cutter
https://hackaday.com/2021/12/17/simple-mods-turn-3d-printer-into-electrochemical-metal-cutter/

We’re not aware of any authoritative metrics on such things, but it’s safe to say that the Ender 3 is among the most hackable commercial 3D printers. There’s just something …read more (https://hackaday.com/2021/12/17/simple-mods-turn-3d-printer-into-electrochemical-metal-cutter/)

This Week in Security: Log4j, PDF CPU, and I Hacked Starlink
https://hackaday.com/2021/12/17/this-week-in-security-log4j-pdf-cpu-and-i-hack-starlink/

The big news this week is Log4j, breaking just a few hours too late to be included in last week’s column. Folks are already asking if this is the most …read more (https://hackaday.com/2021/12/17/this-week-in-security-log4j-pdf-cpu-and-i-hack-starlink/)

Gluggle Jug Is Neat Application of Hydrodynamics
https://hackaday.com/2021/12/17/gluggle-jug-is-neat-application-of-hydrodynamics/

The Gluggle Jug is an aptly-named thing – it’s a jug that makes loud, satisfying glugging noises when poured. But how does it work? [Steve Mould] set out to investigate.  …read more (https://hackaday.com/2021/12/17/gluggle-jug-is-neat-application-of-hydrodynamics/)

Hackaday Podcast 149: Ballerina Bot Balances, Flexures Track Cat Food, PCB Goes Under the Knife, and an ATtiny Does the 555
https://hackaday.com/2021/12/17/hackaday-podcast-149-ballerina-bot-balances-flexures-track-cat-food-pcb-goes-under-the-knife-and-an-attiny-does-the-555/

Newly ordained Hackaday editor-in-chief Elliot Williams and staff writer Dan Maloney jump behind the podcast mic to catch you up on all this week’s essential hacks. We’ll have a Bob …read more (https://hackaday.com/2021/12/17/hackaday-podcast-149-ballerina-bot-balances-flexures-track-cat-food-pcb-goes-under-the-knife-and-an-attiny-does-the-555/)

Error Codes and the Law of Least Astonishment
https://hackaday.com/2021/12/17/error-codes-and-the-law-of-least-astonishment/

Do you know the law of least astonishment? I am not sure of its origin, but I first learned it from the excellent “Tao of Programming.” Simply put, it is …read more (https://hackaday.com/2021/12/17/error-codes-and-the-law-of-least-astonishment/)

Building a Custom Branding Iron With Swappable Date Blocks
https://hackaday.com/2021/12/17/building-a-custom-branding-iron-with-swappable-date-blocks/

Branding can be done on wood with just about any old bit of hot metal, but if you want to do it well, properly-crafted tooling will go a long way. …read more (https://hackaday.com/2021/12/17/building-a-custom-branding-iron-with-swappable-date-blocks/)