Phonographs Through The Eye Of An Electron Microscope

Wahnsinn!

Hackaday

Hackaday Prize judge [Ben Krasnow] has been busy lately. He’s put his scanning electron microscope (SEM) to work creating an animation of a phonograph needle playing a record. (YouTube link) This is the same 80’s SEM [Ben] hacked back in November. Unfortunately, [Ben’s]  JSM-T200 isn’t quite large enough to hold an entire 12″ LP, so he had to cut a small section of a record out. The vinyl mods weren’t done there though. SEMs need a conductive surface for imagingphono_anim_1. Vinyl is an insulator. [Ben] dealt with this by using his vacuum chamber to evaporate a thin layer of silver on the vinyl.

Just imaging the record wouldn’t be enough; [Ben] wanted an animation of a needle traveling through the record grove. He tore apart an old phonograph needle and installed it in on a copper wire in the SEM. Thanks to the dual stage setup of the JSM-T200, [Ben] was…

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Crowdfunding Follies: Proof That Ohm’s Law Is Arcane Knowledge

Hackaday

This is a cell phone case that can recharge a cellphone using energy captured from its own radio. It’s been featured on dozens of tech blogs, wowed judges at TechCrunch Disrupt, and it’s a Kickstarter Staff Pick. It’s also proof that nearly everyone in the media who claims any knowledge of technology has no idea behind the foundational properties of technology.

What it is

The Nikola Phone Case from Nikola Labs is a very special phone case for the iPhone 6 and Samsung Galaxy S6. The claims behind this cell phone case state it will recharge your battery by capturing radio energy put out by the cell phone itself. This means capturing RF from the WiFi and cellular transmitters. This captured energy is then converted into something that can recharge the phone, is sent to the USB or Lightning port, and – theoretically – the cycle of electrons turning into…

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