30 May '16, 5pm

Hackaday Dictionary: Software Defined Radio (SDR)

Hackaday Dictionary: Software Defined Radio (SDR)

We are entering a new era of radio technology. A new approach to building radios has made devices like multi-band cell phones and the ubiquitous USB TV receivers that seamlessly flit from frequency to frequency possible. That technology is Software Defined Radio, or SDR. A idealized radio involves a series of stages. Firstly, an antenna receives the radio signal, converting it into an electrical signal. This signal is fed into a tuned resonator which is tuned to a particular frequency. This amplifies the desired signal, which is then sent to a demodulator, a device which extracts the required information from the carrier signal. In a simple radio, this would be the audio signal that was encoded by the transmitter. Finally, this signal is output, usually to a speaker or headphones. A replica foxhole crystal set. Photo: Bill Jackson That’s how your basic crystal radio works:...

Full article: http://hackaday.com/2016/05/30/hackaday-dictionary-softwa...

Tweets

Radio Shack Returns

hackaday.com 30 May '16, 11am

In February 2015, Radio Shack–an icon in American malls and towns–filed for bankruptcy. You could say a lot of critical th...

get the software here

arduino.cc 04 Jun '16, 8am

THE ARDUINO SOFTWARE IS PROVIDED TO YOU "AS IS" AND WE MAKE NO EXPRESS OR IMPLIED WARRANTIES WHATSOEVER WITH RESPECT TO IT...

Free Radio On My Phone

hackaday.com 28 May '16, 2pm

If you have owned Android phones, there’s a reasonable chance that as the kind of person who reads Hackaday you will at so...

Hackaday Prize Needs You: Build for Citizen Scientists

Hackaday Prize Needs You: Build for Citizen Sci...

hackaday.com 30 May '16, 2pm

Humanity is better when we work together. Nowhere is this more true than when it comes to Citizen Scientists — the concept...

Hackaday Prize Entries: Inventing New Logic Fam...

hackaday.com 31 May '16, 5am

One of the favorite pastimes of electronics hobbyists is clock making. Clocks are a simple enough concept with a well-defi...

Hackaday article - OzQube-1: A Tiny Australian ...

hackaday.com 29 May '16, 11am

Over the last couple of decades we have become used to the possibility of launching a satellite into orbit no longer being...

PhD Crystal Radio has Pizza Capacitor

PhD Crystal Radio has Pizza Capacitor

hackaday.com 26 May '16, 8pm

Crystal radios are old news, but great fun. What would happen if a PhD designed a crystal set? By PhD we mean Pizza Hut De...

The fully #solar-powered home is fit for battle against extreme weather. #sustainability

The fully #solar-powered home is fit for battle...

gbdmagazine.com 04 Jun '16, 5pm

Every year, the US Department of Energy challenges 20 collegiate teams to design, build, and operate a cost-effective, ene...

#ICYMI, check out the retrolicious exhibition that traces the evolution of radio in SG

#ICYMI, check out the retrolicious exhibition t...

nationalmuseum.sg 01 Jun '16, 11am

The introduction of radio in the early 20th century sent ripples of change throughout Singapore, opening windows to other ...

Hackaday Prize Entry: Ears On The Back Of Your Head

Hackaday Prize Entry: Ears On The Back Of Your ...

hackaday.com 01 Jun '16, 5am

To fix this problem, he came up with a simple hack, the metrophone. An ultrasonic sensor is hung from a backpack. The user...