Cooking A Turkey With 880 AA Batteries

Cooking a turkey right is serious business this time of year. With major holidays on the line, there’s no room for error – any mistake can leave guests disgruntled and starving. [Stephen Farnsworth] took a risk, though, and attempted to cook a turkey using AA batteries.

The allure of the AA for such a task is precisely because it’s such a poor choice. Designed for portability rather than high power output, it was never designed to be the energy source for a major cooking job. To get things over the line, [Steve] busted out the math to figure out how many batteries would be required. This involved computing cooking efficiencies, battery thermal performance, and the specific heat of the bird itself. With the numbers coming together a 300W slow cooker was put on duty, in order to avoid over-draining the batteries.

With 880 AAs loaded into a custom carrier, [Steve] hooked up the power meter and the cooker and kept a close eye on the temperatures. After a couple of hours, the battery pack started to heat up, so additional cooling was brought in to avoid fire. At just before the six hour mark, the turkey was cooked through and ready to eat. Estimates are that the batteries still had plenty of capacity to keep going for a few hours yet, too.

It’s not a fast or effective way to cook a turkey, but it’s certainly achievable. We fully expect [Steve] to submit the coin-cell turkey cook-off next year, too. Remember, a little engineering always helps, especially in the kitchen. Video after the break.

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Check Your Halloween Candy For Malicious Payloads

There’s long been much handwringing around Halloween around the prospect of pins, needles and razor blades being hidden in candy and passed out to children. On the very rare occasion this does happen, the outcome is normally little more than some superficial cuts. However, for 2019, [MG] has developed an altogether different surreptitious payload to be delivered to trick or treaters.

Consisting of a small USB device named DemonSeed, it’s a HID attack gadget in the genre of the BadUSB devices we’ve seen previously. When plugged in, the unit emulates a USB keyboard and can be programmed to enter whatever keystrokes are necessary to take over the machine or exfiltrate data. Files are available on Github for those looking to replicate the device.

The trick here is in the delivery. [MG] has produced a large quantity of these small devices, packaging them in anti-static wrappers. The wrappers contain a note instructing children to insert them into their parent’s work computers to access “game codes”, and to share them with their friends while hiding them from adults.

The idea of children brazenly plugging hostile USB devices into important computers is enough to make any IT manager’s head spin, though we suspect [MG] doesn’t actually intend to deploy these devices in anger. It serves as a great warning about the potential danger of such an attack, however. Stay sharp, and keep your office door locked this October 31st!

Creepy Halloween Doll Might Make You Betsy Wetsy

If you want to terrify your neighborhood this Halloween, you might go for the old standbys like skeletons or zombies. But you don’t have to go gory to find glory. Consider the talking doll. Those things are creepy enough already, right? Well, [cabuu] says no, the doll should be animated with servos and have remote control. She should still be able to talk, just not when you expect her to.

Forget pushing on her stomach, ’cause Baby’s got a Wemos D1 mini and her own Blynk app now.  A set of sliders in the app control a micro servo that animates her eyes, and another servo that twists her head from side to side. Her head doesn’t go all the way ’round, but that’s probably for the best. There are preset fright modes [cabuu] can set and forget until she springs to life via motion sensor.

We particularly like the bracket [cabuu] designed and printed that joins the eyeballs with the servo, along with his clever use of printed mate brackets to hold the servos in place within the head. If you think you can stomach it, there’s a demo video after the break. Stay tuned for total doll dissection after that as [cabuu] builds and inserts the terrifying tidbits.

We love hacks that combine innocence with insanity. Have you ever seen Thomas the Tank Engine singing Rick Astley?

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Pneumatic Zombie Will Blow Away Trick-or-Treaters

What are you doing for Halloween this year? Just gonna set the candy bowl out on the porch and call it good? That’s a risky one, ’cause if one group of mischievous preteens cleans you out, you might get TP’d by the next one. Best to keep Halloween a tad on the scary side and keep those ghouls in line. Candy is a privilege, not a right.

Halloween is a big deal in [trimbandit]’s little burg, and he builds a new attraction for the front yard every year. This year, it’s the dawn of the dead — a fresh zombie rising jerkily from the grave to say hello, world. He moves left, he moves right, he writhes and wrestles, wedged between worlds.

His life force comes from a pneumatic system designed for props. The cylinders connect to a controller with built-in relays that makes programming frightfully easy. Then it was just a matter of adding a foam head, skinning it with a scary mask, and fitting him for a suit from Goodwill. Drag yourself and your candy bucket past the break for a fun-size demo video and a couple of bonus goodies.

We bet [trimbandit] is already wondering how to step up his game for next year. He seems to have conquered the ground, so why not take to the skies for fright and delight?

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This Dry-Ice Powered Fog Machine Is Perfect For Halloween

The leaves are turning brown, and the spookier season is upon us. If you’re currently working up plans for a top-notch Halloween party, you would do well to consider building a fog machine like this unit from [DIY Machines]!

This fog machine is based around dry ice, so you’ll need to source that from an external supplier. The machine consists of a closed container filled with hot water, inside which is a movable bucket filled with dry ice. By lowering the dry ice into the water, fog is produced.

An Arduino is used to control the bucket, allowing the amount of fog produced to be controlled with a smartphone app. There are also controllable LEDs built in to give the fog a suitably eerie glow. The build relies on a series of 3D printed parts for the mechanism, and features several different nozzle designs for achieving different effects, such as a rising geyser or a thick low-lying fog.

The basic concepts are simple and it’s a build anyone could knock out in a weekend with a 3D printer and an Amazon account. It’s a great way to add to the ambience of Halloween, but of course, that’s not all fog can do. Video after the break.

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A Useless Tomb Of Eternal Doom

It’s officially October, and that means we can start unleashing the Halloween hacks. Take for example this restless skeleton that master automaton maker [Greg Zumwalt] has doomed to spend eternity inside of a useless box. If that wasn’t enough to wake the dead, every time some joker pushes the button, these blinky lights come on. Hey, at least there’s no opera music.

The ironic thing about useless machines is that there are a ton of ways to make them. This spooktacular Halloween-themed do-nothing box doesn’t use a microcontroller, or even a 555 — it’s purely electromechanical. When the button is pressed, two AAAs power a small gear motor that simultaneously lifts the lid, raises the dead, and twists him a quarter turn so he can close the lid and put himself back to eternal rest.

The intricately-printed skeleton doesn’t really push the button — he’s far too dead and frail for that. The gear motor also turns a dual-lobe cam that activates a pair of roller switches that handle the candles and lower Mr. Bones back into his crypt. Clear as blood? Skitter past the break for a closer look at the mechanism.

Halloween or not, we love a good useless machine around these parts. Here’s one that incorporates a real candle and who could forget this octo-switched beast?

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Old CDs Create A Haunting Rainbow Vortex

The 1960s were, in Western culture, a time of great social and political upheaval, and the dawning of the psychedelia subculture. This resulted in an art style consisting of bright colours in wild, shifting designs. [Afraser-kruck] has built a device capable of generating beautiful rainbow light patterns, which he calls Mesmer-Eyes.

Unnerving, to say the least.

The device uses two CDs, stripped of their reflective coating. This leaves the plastic layer behind, which appears to be acting as a circular diffraction grating. By passing light from a flashlight through a CD, a dazzling rainbow vortex is created, and the effect is even further improved by adding a second disc. The patterns can be moved and shifted by changing the distance between the discs themselves, as well as the flashlight. This is achieved through the use of a sled that slides on PVC pipes, holding each individual element.

It’s a build of a kind we haven’t seen before, and is put to good use as a creepy Halloween decoration, imitating the famous Cheshire Cat. It’s one we can’t wait to tackle ourselves, and we wonder how difficult it would be to turn it into a projection, or a larger scale design.

Creepy eyes remain a Halloween staple; we’ve featured them before. Video after the break.

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