Piezo Transducers Could Turn Displays Into Speakers
https://hackaday.com/2024/02/13/piezo-transducers-could-turn-displays-into-speakers/

Will piezoelectric-based speakers replace traditional speakers over the coming years in space-constrained devices? We have definitely seen the use of piezo transducers in e.g. high-end televisions that use the display’s …read more (https://hackaday.com/2024/02/13/piezo-transducers-could-turn-displays-into-speakers/)

Sprint: The Mach 10 Magic Missile That Wasn’t Magic Enough
https://hackaday.com/2024/02/13/sprint-the-mach-10-magic-missile-that-wasnt-magic-enough/

Defending an area against incoming missiles is a difficult task. Missiles are incredibly fast and present a small target. Assuming you know they’re coming, you have to be able to …read more (https://hackaday.com/2024/02/13/sprint-the-mach-10-magic-missile-that-wasnt-magic-enough/)

Have a Ball with This 3D Printed Sphere-Making Machine
https://hackaday.com/2024/02/13/have-a-ball-with-this-3d-printed-sphere-making-machine/

Alright, everyone has 30 seconds to get all the jokes out of their system before we proceed with a look at this 3D printed wooden ball polisher. Ready? Theoretically, making …read more (https://hackaday.com/2024/02/13/have-a-ball-with-this-3d-printed-sphere-making-machine/)

A Clock Made Out of Electromechanical Relays
https://hackaday.com/2024/02/13/a-clock-made-out-of-electromechanical-relays/

Electromechanical circuits using relays are mostly a lost art these days, but sometimes you get people like [Aart] who can’t resist to turn a stack of clackity-clack relays into a …read more (https://hackaday.com/2024/02/13/a-clock-made-out-of-electromechanical-relays/)

Memory Box Shows Photos Based On Fingerprint
https://hackaday.com/2024/02/13/memory-box-shows-photos-based-on-fingerprint/

With his young son’s birthday coming up in a few weeks, [Mike Buss] wanted to build him something fun that the boy could hold on to all his life. After …read more (https://hackaday.com/2024/02/13/memory-box-shows-photos-based-on-fingerprint/)

Tool Changing? Bah! Just Add a Second Gantry
https://hackaday.com/2024/02/13/tool-changing-bah-just-add-a-second-gantry/

What’s a dual gantry 3D printer? It’s a machine with two completely independent XY motion systems, with two independent hot ends, sharing the same build platform. That might be a …read more (https://hackaday.com/2024/02/13/tool-changing-bah-just-add-a-second-gantry/)

Writing – So Easy a Caveperson Could Do It
https://hackaday.com/2024/02/13/writing-so-easy-a-caveperson-could-do-it/