Here is a tear-down of one automation product. It is a relay base made by Phoenix Contact. As you can see is is a pretty normal looking relay product you see on automation systems. It mounts to DIN rail. As you can see in the picture the whole product is designed for 48V DC operation. →
Thixotropy article tells about the technology of anti-shoplifting tags used on store merchandise. They are high-Q tank circuits which if carried between a transmitting and receiving panel at a store’s doorway, they enhance 9 MHz signal propagation between those two panels and the alarm goes off. When a purchase is made, the store clerk deactivates →
I have written about sending video signals over UTP cable. I have covered single composite video signal and audio. Now it is time to discuss sending VGA over UTP cable. Some DIY people (including me) have built different kind of adapters from VGA connector to RJ-45 connector. In best cases simple passive connection between those →
Google’s latest and hottest gadget Google Glass needs little introduction because it has been on tech news many times. The core chips powering Google Glass: What’s Inside Google Glass? article shows you the electronics inside this gadget. a TI OMAP4430, 16GB of SanDisk flash, an Elpida mobile DRAM chip. The main board also holds RF →
This week started with news titled D-Link Router backdoor vulnerability discovered and Back door found in D-Link routers. This rather worrying security vulnerability on several D-Link branded modem routers made me to check my system because I use D-Link firewall. But let’s start from the basics. Because D-Link device was on news, where is a →
I just read an interesting article True or false? High-power LEDs don’t generate IR heat in the forward direction like a filament lamp that give something to think about on LED technology. I and you have for sure read that a high power LED emits no UV or IR and that any heat is created →
Arduino news seem to be coming this week. First there was Intel Galileo board and then Arduino TRE. Third new product is Arduino Robot. Arduino Robot is the first official Arduino on wheels. The robot has two ATmega32u4 processors, one on each of its two boards. The Motor Board controls the motors. The Control Board →
Ex-Amazon Engineer Builds Library for World’s Software Code article mentions and interesting service: Runnable. Companies like Amazon and Google try to share their code with every other engineer at the company. The idea is to ensure that they never build the same thing twice. This kind of practices have created a huge discovery problem to →
Here is the power supply that came with a cheap MP3 player. It is a power supply that takes in 230V mains power and outputs 5V at USB connector. What is wrong with this power supply? Let’s start with the electromechanical design. The mains connection pins that can be folded in and out at a →
Stallman’s GNU at 30: The hippie OS that foresaw the rise of Apple – and is now trying to take it on article tells that GNU fans have celebrated their software movement’s thirtieth birthday – a movement that started as rebellious bits and bytes of tools, and is now a worldwide phenomena. Stallman launched the →