In electronics, a mixer, or frequency mixer, is an electrical circuit that creates new frequencies from two signals applied to it. In its most common application, two signals are applied to a mixer, and it produces new signals at the sum and difference of the original frequencies. Other frequency components may also be produced in a practical frequency mixer. Mixers are widely used to shift signals from one frequency range to another, a process known as heterodyning, for convenience in transmission or further signal processing. For example, a key component of a superheterodyne receiver is a mixer used to move received signals to a common intermediate frequency. Frequency mixers are also used to modulate a carrier signal in radio transmitters. (Wikipedia).
Two identical tuning forks and sounding boxes are placed next to one another. Striking one tuning fork will cause the other to resonate at the same frequency. When a weight is attached to one tuning fork, they are no longer identical. Thus, one will not cause the other to resonate. Whe
From playlist WAVES
Introduction to Frequency Selective Filtering
http://AllSignalProcessing.com for free e-book on frequency relationships and more great signal processing content, including concept/screenshot files, quizzes, MATLAB and data files. Separation of signals based on frequency content using lowpass, highpass, bandpass, etc filters. Filter g
From playlist Introduction to Filter Design
In this video i demonstrate sound waves interference and standing waves from loudspeaker used sound sensor. The frequency on loudspeaker is about 5500Hz. Enjoy!!!
From playlist WAVES
Tuning Fork Demonstration of Sympathetic Resonance
Sympathetic resonance or sympathetic vibration is a harmonic phenomenon wherein a formerly passive string or vibratory body responds to external vibrations to which it has a harmonic likeness. A common illustration of sympathetic vibration is to sound a tuning fork and bring it close to,
From playlist Waves
Frequency Domain Interpretation of Sampling
http://AllSignalProcessing.com for more great signal-processing content: ad-free videos, concept/screenshot files, quizzes, MATLAB and data files. Analysis of the effect of sampling a continuous-time signal in the frequency domain through use of the Fourier transform.
From playlist Sampling and Reconstruction of Signals
Using Blender to Add Images, Text, and Sounds to Video Clips
In this video we show how to overlay images and text on top of video clips using Blender. We also show how to add sound effects and soundtracks to the clip. Topic and Timestamps: 0:00 – Introduction 3:00 - Adding voice-overs and sound effects 5:34 - Adding image/picture overlays 11:57 -
From playlist Blender as a Video Editor
How to Make Piezoelectric Crystal Speaker
I make a loud speaker for a clock radio using a piezoelectric crystal. Actually I experiment with a variety of piezo crystals. That includes a piezoelectric igniter crystal from a BBQ lighter and a homemade/DIY rochelle salt piezoelectric crystal. I also try out a piezo buzzer from Radio S
From playlist Currently Popular
EEVblog #1109 - Spectrum Analyser Design Walk-through
A step-by-step walk-though of a typical modern low cost 3GHz "All Digital IF" spectrum Analyser design. Forum: http://www.eevblog.com/forum/blog/eevblog-1109-spectrum-analyser-design-walk-through/ EEVblog Main Web Site: http://www.eevblog.com The 2nd EEVblog Channel: http://www.youtube.c
From playlist Product Reviews & Teardowns
Apollo Comms Part 3: Inside the S-Band Transponder
We take a closer look at the S-Band transponder from the Apollo command module, and marvel at the 5 transmitters and receivers it contains. The transponder was manufactured by Motorola, and is entirely solid-state. 0:00 Recap of previous episodes 1:56 Overall block diagram 5:49 Looking in
From playlist Space Hardware
Electrical Engineering: Ch 19: Fourier Transform (2 of 45) What is a Fourier Transform? Math Def
Visit http://ilectureonline.com for more math and science lectures! In this video I will explain the mathematical definition and equation of a Fourier transform. Next video in this series can be seen at: https://youtu.be/yl6RtWp7y4k
From playlist ELECTRICAL ENGINEERING 18: THE FOURIER TRANSFORM
Apollo Comms Part 7: NASA phase modulated receiver
We try to bring up the original test equipment receiver for the phase modulated link. Does not go as planned, of course. Apollo Comms Playlist: https://www.youtube.com/watch?v=v49ucdZcx9s&list=PL-_93BVApb58SXL-BCv4rVHL-8GuC2WGb Links to doc: https://www.curiousmarc.com/space/apollo-s-ban
From playlist Space Hardware
Lec 23b - Phys 237: Gravitational Waves with Kip Thorne
Watch the rest of the lectures on http://www.cosmolearning.com/courses/overview-of-gravitational-wave-science-400/ Redistributed with permission. This video is taken from a 2002 Caltech on-line course on "Gravitational Waves", organized and designed by Kip S. Thorne, Mihai Bondarescu and
From playlist Caltech: Gravitational Waves with Kip Thorne - CosmoLearning.com Physics
EEVblog 1416 - Random TEARDOWN: Sennheiser EW100 True Diversity Receiver
Random teardown from the lab, a Sennheiser EW100 true diversity wireless microphone receiver. Plus an explanation of how antenna diversity works. Transmitter and camera receiver teardown: https://www.youtube.com/watch?v=dFvN04Woihk Gary: https://twitter.com/Gary43696951 Forum: https://www
From playlist Product Reviews & Teardowns
MagLab User Summer School: Principles & Operation of the Lock-In Amplifier
This video was recorded in 2016 at the National MagLab’s annual User Summer School, where early-career scientists learn from lab experts best practices for conducting experiments at the lab. For more information, please visit https://nationalmaglab.org/user-summer-school
From playlist User Summer School Talks
My participation to SoME1
From playlist Summer of Math Exposition Youtube Videos
EEVblog #1101 - Siglent SVA1015X VNA Teardown
Teardown and look at the new $1395 Siglent SVA1015X 1.5GHz Spectrum and Vector Network Analyser Well, $2000 when you include the actual VNA option :-/ SSA3021X Spectrum Analyser Teardown: https://www.youtube.com/watch?v=-8fr_otW0q4 Forum: http://www.eevblog.com/forum/blog/eevblog-1101-si
From playlist Product Reviews & Teardowns
Lec 32 - Phys 237: Gravitational Waves with Kip Thorne
Watch the rest of the lectures on http://www.cosmolearning.com/courses/overview-of-gravitational-wave-science-400/ Redistributed with permission. This video is taken from a 2002 Caltech on-line course on "Gravitational Waves", organized and designed by Kip S. Thorne, Mihai Bondarescu and
From playlist Caltech: Gravitational Waves with Kip Thorne - CosmoLearning.com Physics
What is Sound? - Quickly Discover What Sound Really Is
What is Sound? This simple demonstration visually shows how sound waves are produced from a vibrating surface. A frequency generator is hooked up to a power amplifier, and the resultant signal is used to drive a loudspeaker. The signal is also sent to an oscilloscope. After listen
From playlist Physics Demonstrations
GRCon19 - Spectrum Monitoring Network: Tradeoffs, Results, and Future Directions by Peter Mathys
Spectrum Monitoring Network: Tradeoffs, Results, and Future Directions by Peter Mathys, Todd Schumann, Jeff Wepman, Mike Cotton Due to its high inherent cost, there is limited use of professional grade test equipment in the field to monitor, or even identify, spectrum usage. Therefore, to
From playlist GRCon 2019