Making the Electronics for CDM324 – 24GHz Doppler Motion Sensor

The Doppler Effect I'm sure you're quite familiar with the Doppler effect: you send an RF signal at a given frequency to a target, and if this object/person is moving the reflected signal's frequency will be shifted. This is the reason why a fire truck's siren has a higher pitch when the truck is going towards you than when it is going away. The CDM324 / IPM165 Motion Sensor You may recall the article I wro ...

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NUAND’S LAUNCHES THE BLADERF 2.0 MICRO WITH FPGA SUPPORT

Everyone believes the future is going to be bright and a lot are betting that smart devices of the future will have the ability to self-adapt to its environment and that’s why some are backing on Cognitive Radios which are Software Defined Radios with AI. Our world is becoming crowded with several smart devices, and the explosion of IoT has made the demand and durability of robust radio networks high while ...

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The Making of a Cooled CMOS Camera

Now this post will be for some serious stuff involving video compression. Early this year I decided to make a lossless compression IP core for my camera in case one day I make it for video. And because it’s for video, the compression has to be stream operable and real time. That means, you cannot save it to DDR ram and do random lookup during compression. JPEG needs to at least buffer 8 rows as it does comp ...

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ICS501 simple frequency multiplier

Today I made a high frequency multiplier using a single component: the ICS501 PLL clock multiplier IC. This chip provides 2x, 5x, 8x (and more) clock multiplication using an internal phased-lock loop (PLL). At less than a dollar on eBay, $1.55 on mouser, and $0.67 on Digikey, they don’t break the bank and I’m glad I have a few in my junk box! I have a 10MHz frequency standard which I want to use to measure ...

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Thundercatch IoT Network

Monitor lightning activity and get alerted on dangerous situations. Things used in this project Hardware components Arduino MKR1000 × 1 MikroElektronika Thunder click × 1 Female/Female Jumper Wires × 1 Software apps and online services Microsoft Azure Microsoft Visual Studio 2015 Arduino IDE Story Introduction Lightning is a phenomenon that always attracted man’s interest. Reasons behind this are the danger ...

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Frequency counter using arduino

Many guys here were asking for a frequency counter and at last I got enough time to make one.  This frequency counter using arduino is based on the UNO version and can count up to 40KHz. A 16×2 LCD display is used for displaying the frequency count. The circuit has minimum external components and directly counts the frequency. Any way the amplitude of the input frequency must not be greater than 5V. If you ...

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How To Make a Simple Variable Frequency Generator Using Arduino

A frequency generator is a very handy device in electronic design, development, testing and trouble shooting. It is such a kind of device which can generate the required frequencies which can be then applied directly to the target device for testing it. There are frequency generators which can generate the required waveform like sine wave, saw tooth wave etc. but for normal applications the square wave gene ...

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Audible Frequency Chirp Sonar with the Stellaris Launchpad

Over the last year I've been working towards an underwater sonar system for ROVs and surface boats. In order to learn the basic signal processing required to detect the echoes, I initially got a simple sonar working in air with a desktop conferencing USB speaker/mic running on Windows. A writeup, including source, is here. That article describes the algorithms used in detail and would be a good read if you ...

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Frequency and Phase Locked Loops (PLL)

The purpose of a PLL is to generate a frequency and phase-locked output oscillation signal. To achieve this goal, prior art essentially functioned by frequently changing the PLL output frequency according to the phase error (i.e. the faster/slower phase relationship) to generate a momentary, but not static, frequency and phase locked output oscillation signal. This frequent back-and-forth change in VCO freq ...

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Frequency and Phase Locked Loops (PLL)

The purpose of a PLL is to generate a frequency and phase-locked output oscillation signal. To achieve this goal, prior art essentially functioned by frequently changing the PLL output frequency according to the phase error (i.e. the faster/slower phase relationship) to generate a momentary, but not static, frequency and phase locked output oscillation signal. This frequent back-and-forth change in VCO freq ...

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