Multi-band antenna 2J301 offers several properties for which it´s worth to consider its usage in your devices. Decent gain, good VSWR values, small dimensions, resistance to outdoor conditions and a simple mount method are probably basic features, which we´d expect from external antennas for the GSM/UMTS, PCS bands. Antenna 2J301M/SMA from company 2J provides all […]
High-quality GSM/3G signal directly to your device Read More »
If you own one of these phones, you may have wondered how two separate phone lines could originate from one device. After all, single-line and two-line phones look remarkably alike, and they plug in the same way. Where’s the magic? Pull the phone cord out of the jack and look at it closely. You’ll probably
How Two-line Phones Work Read More »
Super Capacitors have become more popular over the past 5 years and are beginning to replace batteries in some applications. Charging a super cap can be tricky especially if you want to avoid damaging it. Here is a basic circuit that will allow you to charge a super capacitor with a solar panel. For
How to Charge a Super Capacitor with a Solar Panel Read More »
The invention of two-liter bottle dispensers may change that. Two-liter dispensers come in two basic styles: a bottled soda dispenser with a mounting stand and a lever, and a pressurized beverage dispenser with a soda siphon style cap and straw that goes into the two-liter bottle. Both are designed to make pouring soda easier while
How 2-Liter Dispensers Work Read More »
Screens speak of color in terms of 3 channels: Red, Green and Blue. Humans tend to think of colors in 3 channels too, but the channels that seem more natural usually are Hue, Saturation and Brightness. Here is an arduino color library so you too can specify colors by their hue! We use this code
HSB RGB Arduino Color Library Read More »
What is telematics? The word telematics technically refers to any system by which a mechanical or electronic device communicates with other devices or with human users over a network. Over the years, the term has come to mean the specific use of on-board communication capabilities in automobiles. General Motors calls their telematics system OnStar, while
How the Hughes Telematics Device Works Read More »
The first metronomes were spring wound and, like old watches, they tended to keep time poorly as the springs lost tension. Today’s metronomes are more reliable. Some can even be programmed to play a variety of sounds, from conga drums to electronic cheeps and beyond. Head over to the next page to read all about
How Metronomes Work Read More »
Push-buttons resistant to dust and water, moreover with the well-visible LED backlight, will manage even rough handling. If you have an application, where you need sturdy push-buttons and ideally even with backlight, then the Schurter MSM19 may be the right for you. Dust- and water-proof push-buttons can be advantageous not only in an expressly demanding
Resistant and irresistibly beautiful push-buttons Schurter MSM 19 Read More »
Then MP3 players like the iPod came along, and the inner space of music lovers everywhere was forever transformed. By donning a pair of white earbuds, people can drown out the outside world to a personally customized soundtrack. Wouldn’t you know it — that’s what we do when we get in the car and crank
How to connect an iPod to your car stereo Read More »
Whether your energy harvesting application uses large solar panels with high voltages and currents or, more often the case, must make do with minute amounts of power derived from various other ambient energy sources, one thing is almost certain: some type of energy storage is on board, whether in the form of a small rechargeable
Battery-Charging Controllers for Energy Harvesters Read More »
