[Dr. West] shared his Halloween costume with us; a Daft Punk inspired voice-changing helmet. He stared with a motorcycle helmet, cutting out a hole in the back for a sub-woofer speaker. Inside there’s an old computer mic and the amp circuitry for a portable stereo system. An Arduino is used to pick up the wearer’s voice from the microphone and perform the digital signal processing. Once the alterations have been made the signal is sent to an R-2R resistor ladder to perform the digital to analog conversion, and onto the amp for broadcast. Hear the result in the video after the break.

The rest of the helmet is window dressing. He found some kind of auto-body repair product called flex-edging to use as metallic hair. Those fins are accented with strings of red and blue LEDs. The faceplate finishes the look using speakers from the stereo system and a tinted visor.

He wan’t going for a replica, but we think his creation would be right at home with the look of the original.

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The Halloween hacks are rolling in late this year, but we’re delighted to see that [DJ Sures] finished his borg costume in time. It is made up of a hodge-podge of items from different cultures… oh wait, so are the borg. These include a set of hockey pads spray painted black with just a light misting of silver to give them some depth. After taking the image above (which mostly shows off his makeup) [DJ Sures] added an LCD screen to the chest plate and lighted electronics throughout. See for yourself after the break.

If you liked this you might take a look at his singing spark plug.

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Here’s a great way to guard your front door on Halloween. [Sam Seide] built a motion controlled talking skeleton. The electronics are fairly straight forward, consisting of an Arduino, WAV shield, PIR motion sensor, servo motor for the jaw, and a couple of red LEDs for the eyes. But [Sam] did some really neat things in the design of the skeleton itself. As we saw with the puking pirate, he built the body out of PVC so that he can take it apart for easy storage. Under the reaper robe you’ll find a set of powered computer speakers that connect to the WAV shield. The servo motor is mounted in the skull and moves the jaw using a small wire arm. Since the whole thing is a bit flexible (thanks to the PVC), the torque of the motor causes the skeleton to move around, adding a touch of life. Don’t miss the well-made video walkthrough after the break.

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What takes eight hours to solder and uses more shrink tubing that you thought imaginable? An LED matrix installed in a real pumpkin. When I mentioned that we’d like the LED pumpkin in last Friday’s post scaled up to a full LED matrix I had no idea it would be me doing the work. But [Caleb] and I thought it might be just the thing to present for the hacker’s favorite holiday.

Installed in the autumn vegetable is a marquee made from a 5×14 matrix of light emitting diodes. I spaced them by printing out a grid on the computer, taping it to the pumpkin, and drilling 70 holes in the front of the thing. The real trouble came when inserting all of the LEDs from the inside; each of them has four wires soldered to it, creating a net of black wiring. Above you can see it turned out great. This is a shot of it scrolling the message HAPPY HALLOWEEN.

Join us after the break for video of this prop. But we’re not just sharing the finished product. I’ll take you through the build process. Along the way you’ll learn the design considerations that go into an LED matrix and how you can use these techniques to build your own in any size and configuration you desire.

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[Nollie551] sent us a demonstration of his head spinning yard prop. Adding a possessed child as part of your Halloween display is a nice touch. But when her head starts to spin (think: The Exorcist) as trick-or-treaters saunter by it should scare the life out of them. You can see that all it took is a jig to hold an inexpensive power drill in place. He didn’t include details of how this is hooked up but we think it would be a great way to use that drill switch hack that [Ben Krasnow] did a while back.

Join us after the break for some video.

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Evil Mad Scientist Laboratories is preparing for Halloween with this standby-mode pumpkin. Inside there’s an LED plugging a hole that is drilled just to the skin of the gourd-like vegetable. It fades in and out similar to a sleeping Mac, using what we think is a vastly over-powered circuit based on an ATtiny2313 (1k  of programming space for this?). But we still like the idea and we’d enjoy seeing it scaled up to a full LED matrix.

We’ve come to expect pumpkin hacks from EMSL and they don’t disappoint. Last year was a mechanized version, and the year before an LED schematic symbol. So what about your creation? With about one week left, take a look around and see if you can’t create something as wonderful as the Pie of Sauron.

[Isaac] grabbed the motor from an old printer and used it to make a spider run up and down the wall for Halloween. A PIC 12F683 uses a MOSFET to drive the motor. The program loop has a little bit of dramatic flare to it, raising the arachnid with a bit of a jerky motion to give it some life, then wait for a time before quietly lowering the spider (hopefully onto an unsuspecting party-goer).  The driver board is set up for two motors, making it easy to reuse in future projects. This is quite effective, and the only addition we might suggest is to add a couple of red LEDs as some glowing eyes.

Take a look at the finished product after the break.

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To userp the Green Lantern oath is a sacrilege. But calm your rage as you take in this Green Lantern battery and ring project. [Jon] built the power battery portion out of LEGO, but inside you’ll find an added bonus. An Arduino uses a set of LEDs and an RFID reader to bring the object alive. A matching ring contains the RFID tag that activates the lights when held up to the lantern’s lens. You can see this used to charge the power ring (and join in by saying the oath) in the video after the break.

Want to build something like this but don’t have an RFID reader? This would be easy to pull off by adding a magnet to the ring and a hall effect sensor in the lantern. Maybe this will make you rethink your Halloween costume this year.

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