The Spooky Tesla Spirit Radio is a crystal radio circuit in a jam-jar. It makes fun spooky sounds by responding to input from several types of electromagnetic sources. This non-powered radio plugs right into the computer sound-in jack, and makes use of audio software for real time sound effects.
Good tutorial on putting together a pneumatic power system for “home imagineering,” as as the folks at Phantasmechanics call it. We’ve blogged their stuff a couple times before.
MAKE subscriber thom writes in to tell us about Marc Fischer’s ambitious project to do something creative every day, for a year, and document it. One of his latest projects is a DIY MIDI footpedal, made from a pocket-sized MIDI keyboard and some blocks of wood.
If you’re still looking for ideas for this (or next) year’s Halloween display, check out HauntProject.com. They’ve done a great job of assembling cool Halloween projects from all over the web and have nearly 1,000 indexed and categorized as of this writing. Shown here are three of my faves so far. Above, a sweet crashed flying saucer prop by Scott Rossi. Below, a motorized monster-in-a-box by Bob and Cindy Stewart.
No photos yet. That’s a homework assignment for the bubble chemists in the audience. But I couldn’t resist sharing my excitement over this paragraph from US patent 5246631 for glowing soap bubbles:
An example of practice of the present invention involves using a liquid dish such as LEMON JOY available from Procter & Gamble Company (Cincinnati, Ohio). Although the LEMON JOY may be diluted with varying amounts of water, it is preferred that the dishwashing liquid be used at full strength. Approximately 9 milliliters of CYALUME solution made in accordance with the manufacturers instructions are added to approximately 120 milliliters of the dishwashing liquid. Although this particular mixture may be used to produce adequate self-illuminated bubbles, it is preferred that 3 to 4 drops of glycerin be added to the solution as a bubble hardener. The solution is then ready for use to form self-illuminated bubbles.
I’ve never actually measured how much Cyalume (wikipedia) is in a standard glow-stick, but I’m betting you could come up with 9 mL of the stuff by cutting open two or three at most.
Dane sends us this, perhaps surprisingly, simple non-digital mod for adding a delayed auto-off to an inexpensive taplight – Analog circuit design has been relatively abandoned in comparison to digital design. Sure, its more complex to get working, and sometimes finicky in terms of noise, but it excels in other areas, like filtering and other […]
In need of a way to transmit a video signal to an aging antennae-input TV set, John rigged up a working RF modulator from salvaged parts (plus 5V supply) – I decided not to build my modulator from first principles. A simple design with a UHF cavity oscillator and simple sound and vision carrier and […]
