If you've ever wanted to strap yourself into one of those modern electric rides from Currie Technologies, now's your chance. A veritable smörgåsbord of surplus motors, gears, and controls is now available from All Electronics. Don't worry about this selection being a bunch of mismatched DIY surplus junk, either. All of these electric vehicle components are genuine Currie Technologies parts.
Would you like to reduce the size of your home security system? Like something on the order of magnitude of motion detectors that can fit on a postage stamp? These tiny rectangular sensors are actually powerful passive infrared (PIR) detectors that can be easily slipped into an area where their larger PIR brethren couldn't even dream of fitting.
Have you ever needed a low-value resistor for a low-voltage battery-powered circuit? Say, something in the range of 10-100 ohms? Finding this value of resistor can be difficult, if not impossible. In cases like this, you might be better off making your own resistor.
Are you torn between two lovers, thinking back lovingly to those simple days of disk-based operating systems that could fit on a 1.44MB disk but remaining steadfastly enamored of a graphical user interface (GUI)? Hold on, Romeo: you can rekindle those passions, and it's only 10MB away.
The countdown is on, my friends. The countdown to the fastest booting OS, that is.
Forget those operating system sloths, Mac OS X and Windows (any flavor). The gauntlet was thrown down when the first mainstream commercial fast-boot OS appeared on a small solid-state drive (SSD) that had been pruned to operate on an ASUS eeePC.
Granted, the fast seek times for data access with the SSD contributed to Xandros's (the eeePC OS) speedy boot time, but users became enamored with the quick, "less than one minute," access to their apps. Thus was born the race to the fastest boot time.
If you've done a fair amount of electronics circuit building, then you probably dread prototyping. You know prototyping: that point where you take your "perfect" circuit design from paper and transfer it to an initial hardware mockup. Typically, you have three basic choices in this matter, each with its own problem.
Your first choice in circuit prototyping is to lay out your design on a modular breadboard. The strongest virtue of this choice is the elimination of soldering -- all connections are built into the breadboard. Unfortunately, breadboards are bulky and unable to handle surface-mount device (SMD) designs.
Following closely on the heels of breadboard prototyping, your second choice is perfboard layout. Once again, most perfboards are unable to accommodate SMD circuit designs. Plus, the point-to-point wiring needed for connecting the components can be a daunting task.
Which leads us to your final choice for circuit prototyping: custom printed circuit board (PCB) fabrication. Whether you roll your own PCB with DIY masks and etch kits, or hire a fab house to create a custom PCB, time will be your enemy. Fab houses can take upwards of one month for delivery of a finished board (unless you're willing to pay extra for faster service), and making your own PCB can be fraught with frustrating failures and delays which can take days to weeks to solve.
No matter whether you felt that Earth Hour was a terrific conservation tactic or an overhyped PR stunt, energy on our planet is in peril. Our daily juice (be it electric, gasoline combustion, atomic, or carbon-based), has become a precious commodity with at least one guaranteed effect: to elicit an instantaneous hot-button opinion from just about everybody.
What can you do about it? Well, one great proactive demonstration would be to stop your regular consumption of dry-cell batteries. Yes, there are numerous substitutes, ranging from rechargeable varieties to alternative energy replacements, but each of these substitutions has a debit that few of us are willing to pay. You know, "costs" like always hunting for an outlet to power a battery recharging station, or getting rid of a clean, slim-line AA battery for a gargantuan solar-driven bat-winged monstrosity.
In the previous two installments of this series, we labored through some ornery hardware wrangling and tested our mettle with some serious Objective-C coding, now it's time to deliver our app to the masses.
The third and final installment in this series takes our App to market, err, the App Store.
In the first part of this series, we covered the "nuts and bolts" for assembling a workable iPhone app development platform. Now that our desktop is cluttered with a mess of cables, it's time to roll up our sleeves and start cobbling some code together.