We aren’t sure whether you know how to use the ancient calculating device, but if you just need a unique way to protect your iPhone 5/5s, the 3D printed iPhone 5s case may be suitable for you. This is...
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Saturday, 30 November 2013
Thursday, 28 November 2013
Room Recorder
My wife was working on a doctoral dissertation and needed to do some field work involving personal interviews in various settings. What would be the best way, technically speaking, to record the interviews?...
Romo the Smartphone Robot
So you happen to be a smartphone user for the past few years already, and have more or less gotten bored of the device, so much so that you are thinking about the possibilities of a new kind of smartphone...
Tuesday, 26 November 2013
Power Diode For Solar Power Systems
Apart from the sun, solar power systems cannot work without a reflow protection diode between the solar panel and the energy store. When current flows into the store, there is a potential drop across...
Saturday, 23 November 2013
Toshiba Excite 7 Android Tablet Announced
Toshiba has announced Excite 7, its latest Android tablet. If you’re looking for a balance option between price and performance, the 7-inch tablet may be able to catch your eyes. Toshiba Excite 7 is...
Thursday, 21 November 2013
Flashback iPhone 5s Case
Hard-shell iPhone5 case in a throwback design that'll have you partying like it's the year 2000. Allows for full access to all ports and controls & easily snaps right on n' off.Content care ,Plastic,Wipe...
Cookie Shaped USB Mug Warmer
Want to comfortably enjoy your favorite coffee beside your computer? Take a look at the cookie shaped USB mug warmer, it may be able to catch your eyes. This is an interesting and practical USB mug warmer...
Wednesday, 20 November 2013
Timebrick Concrete Clock
It’s not a normal concrete block, but a unique clock that shows you accurate time. If you like this kind of solid design, let’s go on checking the Timebrick concrete clock. The Timebrick is a pretty...
Tuesday, 19 November 2013
Pan Pot
A pan pot enables a mono-phonic input signal to be positioned where desired between the stereo loudspeakers. When P1 (see diagram) is in the center position, there is no attenuation or amplification...
Monday, 18 November 2013
Sounds From The Old West
This circuit shows how far integration can be taken: IC1, a Type HT82207 from Holtek does virtually everything. Only a (small) loudspeaker and the necessary selectors need to be added. The standard 18-pin...
Modem Off Indicator
The modem off indicator is intended especially for serious Internet surfers. It will be seen that the circuit of the indicator cannot be much simpler, or there might be nothing left. In spite of its...
Oscillation Monitor
The circuit in the diagram was originally designed to monitor an oscillator, but can also be used as a general-purpose level indicator for a.c. signals. It is based on a quadruple IC containing four...
Opamp With Hysteresis
At first glance, the circuit in the diagram does not look out of the ordinary, and yet, it is. This is because it combines two characteristics that are usually assumed to be incompatible: hysteresis...
Sunday, 17 November 2013
Low-Power Voltage Reference
The present reference is a special application of current source IC Type LM334. It has a tiny temperature coefficient and draws only a minute current: at room temperature, only 10 µA, which increases...
Mini Audio Signal Generator
A small audio test generator is very useful for quickly tracing a signal through an audio unit. Its main purpose is speed rather than refinement. A single sine-wave signal of about 1 kHz is normally...
Active Short-Wave Antenna
The circuit presented here illustrates the fact that in spite of all kinds of new component and technology, it is still possible to design useful, and interesting, circuits. The circuit is based on two...
Saturday, 16 November 2013
Rear Light After Glow (For Bicycles)
This article is of interest only to readers whose bicycle lights are powered by a dynamo. The laws on bicycle lights in the United Kingdom are stricter than in other countries and a dynamo is, therefore,...
Saturday, 9 November 2013
Digital Main Voltage Indicator
Continuous monitoring of the mains voltage is required in many applications such as manual voltage stabilisers and motor pumps. An analogue voltmeter, though cheap, has many disadvantages as it has moving...
Turtle Beach Anounces iSeries Media Headsets.
When it comes to audio brands, there is one particular name that stands out above the rest for some people, and Turtle Beach would be one of them. The name Turtle Beach has long been synonymous with...
Wednesday, 6 November 2013
Bike Battery Charger
This simple circuit allows a 12V battery pack to be charged via a bike generator. The generator is rated at 3W and with this voltage multiplier circuit provides about 200mA at about 15km/h. A 12V system...
Monday, 4 November 2013
Google Nexus 5 Android Phone Now Available
Google Nexus 5 has been available at Google Play, including two memory models and two colors. If you’re curious, let’s go on checking the official Android phone. Google Nexus 5 is a high performance...
Low-Voltage Cutout For 12V SLA Batteries
This simple circuit protects an SLA battery from over-discharge by disconnecting the load when the terminal voltage drops below a preset level. In operation, a sample of the battery voltage is derived...
Video Games and Computer Performance
If you’re an avid computer game player, you’ve probably run across one that slows down your computer. You’ll notice it’s a little more difficult to run other programs when you have a game running, and...
10 Awesome Computer Tips Everyone Should Know
Here are some useful tricks to help you be a more efficient and knowledgeable computer user: Windows+L: Locks your computer Windows+P: Quickly sets up a second screen...
Saturday, 2 November 2013
Android SDK Installation Guide
Here’s a quick start installation guide to get you up and running with the Google Android Software Development Kit (SDK). This guide will describe how to install the Android SDK and set up your chosen...
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