Analog Switches and Multiplexer

Analog switches are ICs designed to switch analog signals via digital control. The internal structure of these devices typically consist of a number of logic control gates interfaced with transistor stages used to control the flow of analog signals. The CMOS 4066B quad bilateral switch uses a single supply voltage from 3 to 15 V.…

The Benefits and Features Of IPTV

IPTV stands for Internet Protocol Television. This concept is getting popular in the here and now. The features of IPTV offer a great viewing experience and allow you to view your desired content. What is IPTV? Most IPTV services use MPEG4, H264 or proprietary protocols for broadcast or multicast. IPTV can be used to enjoy…

Analog-To-Digital and Digital-To-Analog Conversion

In order for analog devices (eg, speakers, temperature sensors, strain gauges, position sensors, light meters, etc.) to communicate with digital circuits in a manner that goes beyond simple threshold triggering, we use an analog-to-digital converter ( ADC). An ADC converges an analog signal into a series of binary numbers, each number being proportional to the…

Simple Binary-Weighted and R/2R Ladder DAC

A simple 4-bit digital-to-analog converter that is constructed from a digitally controlled switch (74HC4066), a set of binary-weighted resistors, and an operational amplifier. The basic idea is to create an inverting amplifier circuit which gain is controlled by changing the input resistance Rin. The 74HC4066 and the resistors together act as a digitally controlled Rin…

Clarity for Priorities

One of the key things that strikes me in my work is the connection between clarity, effective prioritization, and success. Clarity is not exactly a binary state, but it is not something that exists on a continuum either. To gain clarity, I ask my clients the following: 1) What's your platform? What do you expect…

Microcontroller With Interpreter and Extra Goodies

The BASIC Stamp is, at the heart, a microcontroller with interpreter software built in. These devices also come with additional support circuitry, such as an EEPROM, voltage regulator, ceramic oscillator, etc. BASIC Stamps are ideal for beginners because they are easy to program, quite powerful, and reliably cheap-a whole startup package costs around $ 150…

Was It a Miracle or What?

“Was It a Miracle?” “Are you married?” asked one of my friends. “No, not yet” said I. “I have heard that you have”. “No, I say, no” was my answer. “OK! Are you interested in marriage?” said my friend, “I have a match for you, if you so desire”. “Well, I am ready”. “So we…

Pros and Cons of Managed Services

Today, there are lots of business companies which prefer to tie up with any third party company to get support on IT related chores. You can rely on the managed services for technological outsourcing as this is considered as one of the best model for the vendors and also for the outsourcing organizations if you…

Will Three’s Purchase of O2 Affect You?

Once upon a time (circa 2003), Three was the plucky upstart in Britain's mobile networks race. They came with a weird name, some weird phones (remember the NEC E313?) And peddled something called 3G connectivity. For years they were mired by poor reception and bad phone choices, but the company (funded by the extremely wealthy…

A Guide to BT’s Purchase of EE

For those of us that spend our time thinking about the UK's telecommunications markets, these are interesting times indeed. With Three trying to complete the purchase of O2, Virgin contemplating a move into pay TV and BT purchasing EE, it's a very busy time to be paying attention. It's that last deal, however, that's causing…