Free E-Book: Software Defined Radio for Engineers

Free E-Book: Software Defined Radio for Engineers

We actually like when a vendor finds an amazing ebook on a subject — most likely one they care about — and makes it obtainable without cost. Analog Devices does this frequently and one you need to most likely take a look at is Software Defined Radio for Engineers. The ebook goes for $100 or […]

Everything You Didn’t Know You Were Missing About Bias Tees

Everything You Didn’t Know You Were Missing About Bias Tees

Do you want a bias tee? If you wish to put a DC voltage on high of an RF sign, chances are high that you just do. But what precisely are bias tees, and the way do they work? If that’s your query, [W2AEW] has a solution for you with this informative video on the […]

A Cleverly Concealed Magnetic Loop Antenna

A Cleverly Concealed Magnetic Loop Antenna

We’re certain all radio amateurs will need to have encountered the issue confronted by [Alexandre Grimberg PY1AHD] regularly sufficient that they nod their heads sagely. There you might be, enjoyable within the solar on the lounger subsequent to the crystal-blue pool, and also you fancy working a little bit of DX. But the sheer horror of […]

The History and Physics of Triode Vacuum Tubes

The History and Physics of Triode Vacuum Tubes

The triode vacuum tube may be practically out of date right this moment, but it surely was a expertise vital to creating radio sensible over 100 years in the past. [Kathy] has put together a video that tells the story and explains the physics of the gadget. The first radio receivers used a tool referred […]

Desktop Radio Telescope Images The WiFi Universe

Desktop Radio Telescope Images The WiFi Universe

It’s been a undertaking full of matches and begins, and it very practically ended up as a “Fail of the Week” characteristic, however we’re blissful to report that the [Thought Emporium]’s desktop WiFi radio telescope lastly works. And it’s fairly darn cool. If you’ve been following together with the construct like we’ve, you’ll know that this […]

Learn Something About Phase Locked Loops

Learn Something About Phase Locked Loops

The section locked loop, or PLL, is an actual workhorse of circuit design. It is a basic suggestions loop the place the section of an oscillator is locked to the section of a reference sign utilizing an error sign in the identical primary manner that maybe a controller would maintain a temperature or circulate price […]

The Colpitts Oscillator Explained

The Colpitts Oscillator Explained

The Colpitts oscillator is a time-tested design — from 1918. [The Offset Volt] has a couple of movies masking the design of these circuits together with an op-amp and a transistor model. You can discover the movies beneath. You can inform a Colpitts oscillator by the 2 capacitors within the suggestions circuit. The capacitors kind […]

Portable Ham Radio Design Fosters Experiments

Portable Ham Radio Design Fosters Experiments

[Charlie Morris] has been busy constructing a portable ham radio rig and documenting his progress in a collection of movies. You can see the primary one beneath. There’s 4 elements (extra for those who depend issues like half four and half 4a as two elements) to this point and it’s at all times fascinating to […]

Silicon Bugs In The FTDI FT232R, And A Tidy RF VCO Project

Silicon Bugs In The FTDI FT232R, And A Tidy RF VCO Project

[Scott Harden] wrote in to inform us of some success he’s having using the FT232 chip to speak SPI directly from his laptop to a AD98850 digital signal generator. At least that was his vacation spot. But as so typically in life, greater than half the enjoyable was getting there, discovering some still-unsolved silicon bugs, […]

Understanding a MOSFET Mixer

Understanding a MOSFET Mixer

A mixer takes two alerts and mixes them collectively. The ensuing output is normally each frequencies, plus their sum and their distinction. For instance, in the event you feed a 5 MHz sign and a 20 MHz sign, you’d get outputs at 5 MHz, 15 MHz, 20 MHz, and 25 MHz. In a balanced mixer, […]