A class-D amplifier or switching amplifier is an electronic amplifier where all power devices (usually MOSFETs) are operated as binary switches. They are either fully on or fully off. The term “class D” is sometimes misunderstood as meaning a “digital” amplifier. While some class D amps may indeed be controlled by digital circuits, the class →
The Arduino Ethernet Shield connects your Arduino to the internet. Just plug Arduino Ethernet Shield module onto your Arduino board, connect it to your network with an RJ45 cable and follow a few simple instructions to start controlling your world through the internet. The original Arduino Ethernet Shield is based on the Wiznet W5100 ethernet →
I got CYPRESS SEMICONDUCTOR – CY3269N – KIT, STARTER, LIGHTING DEMO from Farnell for testing. CY3269N Lighting Starter Demonstration Kit is designed to showcase two Cypress technologies: EZ-Color High Brightness LED Controller (tunable white light control, color mixing) and CapSense (capacitive touch sensing). Data sheet says that this kit illustrates how an intuitive GUI lets →
I bought some time ago a 119338 Dual Car Cigarette Sockets Power Adapter with USB Power Port – Black (DC 12~24V) to replace the power adapter in the car that started failing. In hoped this product would fix the situation, but it turned out this was not a good fix. The specifications on the web →
Some time ago I bought Powerlight HX-G011 1W 1xAA LED Flashlight Grey. This is a very useful and cheap LED flashlight. It only uses 1 AA battery, which is really is great. Light is quite bright for the price (feels like between my other old 1W LED flashlight and new 1W LED flashlight) with nice →
Is it “The New iPad?” “iPad HD?” “iPad 3?” Who cares? All we know is this: It’s here! iPad 3 4G Teardown In this video ifixit crew covers the biggest changes to the new iPad, including the fancy-pants 2048×1536 Retina Display, A5X system on a chip processor, updated 42.5 watt-hour battery and 5 megapixel HD →
I bought some time ago High Speed USB 2.0 4-Port Hub (White) from Dealextreme. The main reason for buying that was need for USB hub and the LEGO like design of this HUB, also the price was very reasonable ($5.30). The computers (Vista and XP) detected the device well. It was just plug and play →
Some time ago I saw an interesting video of a new gadget: The WIMM One has a worthy ambition: shifting information from your smartphone screen to your wrist. The aim is to allow you to get on with life rather than pulling your phone from your pocket every thirty seconds. WIMM is a smart watch →
This is my second product test on Free Product Road Testing program by Farnell. This time the tested product is fused test leads for multimeter (Farnell Number: 428-4276). Why Fused Leads? You might ask why test leads need be fused. Trust me there are situations where this is a really good idea. Maintenance of electrical →
EDN Hot 100 products of 2011 article list of the Hot 100 products that in 2011 grabbed the attention of EDN magazine editors and our readers. Browse this year’s Hot 100 products in their respective categories. You can click on any product name to read the original full EDN article. If you do anything related →