I was just pointed to a new interesting ground loop document few days ago. Ground Loop Tutorial is a tutorial on electrical interference with emphasis on ground loops. It distinguishes several different types of interference and discusses the underlying physics at a basic level. In the end there is a good list of Methods for →
Last weekend I finally turned my Raspberry Pi to media player appliance (IP TV STB) using Raspbmc. Raspberry Pi reaches critical mass as XBMC hardware so trying it out sounded a good idea. My main was to use Elisa Viihde service also with my Rasberry Pi connected to monitor (I already had set-top-box and I →
I just wrote how to Turn a Tablet into a Signal Generator. In addition to generating signals, a tablet can be used as audio signal analysis. Typically the only way to get sound into those tablets and smart phones is through built-in microphone, which can be limiting. Here are some Android software for audio signal →
Signal generators are a handy thing to have around the lab. In recent years these lab tools have not only decreased in size but also in cost and the result has been a plethora of portable versions that now exist on the market. In addition to full equipment it is nowadays possible to use a →
Advertisement with your own image, what the heck? Photoshop Live – Street Retouch Prank does that. Cool. Good idea and nice implementation. Is this the future of advertisement? In the video the people waiting for bus are immersed in the advertisement with help of image editing software and image editing artists. Victims of reactions ranging →
For the last week news sources have been full of controversy over the NSA’s controversial PRISM surveillance program (check the latest comments on my Security trends for 2013 article) after top-secret slides detailing the massive electronic surveillance programme were leaked last week by ex-CIA techie Edward Snowden. If those newspaper reports are accurate, the NSA’s →
I own Fujifilm HS20EXR digital camera that use to take photos for this blog. One day I thought I wanted to have a wired external trigger. The ready made cables seemed to be expensive and/or hard to find. So I used the DIY approach: search for needed details from Internet and then build my own →
Over the last decade the way we find, store, and listen to music has undergone a huge change. Online media has changed many aspects of the audio industry, but some things just don’t change. The debate over audio quality still goes on. Ethernet AVB, USB Audio Class 2.0 aid audio quality article discusses on some →
Gesture control uses WiFi doppler shift article tells that researchers at University of Washington have built a WiFi-based gesture control system. The system uses doppler shift in Wifi signal combined with Software-Define Radio (SDR) to detect humans moving near the devices. The researchers see WiSee as a novel interaction interface that leverages ongoing wireless transmissions →
USB Fume Extractor project combines a small craft box, 12v case fan, aquarium carbon filter, dc boost converter and some basic electronic components to create a USB powered fume extractor which treats your lungs to some clean air when soldering. Check the USB Fume Extractor video how the project works: USB Fume Extractor was designed →