29 Apr '16, 1am

Ping Pong Spectrum Analyzer

A spectrum analyzer is a pretty useful tool for working with signals where the size of the frequency components matter. Usually, the display is a screen. Sometimes, you see it done with LEDs. [Mag Laboratories] did it with ping pong balls . The device uses a processor to calculate a Fourier transform, cutting an audio signal into 16 frequency bands. The processor converts each of these values to a PWM output that drives small fans. The fans blow the ping pong ball up the tube proportional to the fan speed. You can see the result in the video below. Of course, as you might expect, the response time of the ping pong balls isn’t going to match the response time on an LCD, but this isn’t meant to be a practical tool, as much as a piece of electronic art. It would be interesting to see this done on a larger scale with some lighting for use at a concert or a dance floor. Last mo...

Full article: http://hackaday.com/2016/04/28/ping-pong-spectrum-analyzer/

Tweets

Audio Spectrum Analyzer with the Linduino

Audio Spectrum Analyzer with the Linduino

linear.com 22 Apr '16, 10pm

There are several methods for implementing a spectrum analyzer. I’ve been working with SAR ADC products for some time, and...

Calif. High-Speed Rail Authority acquires radio spectrum for t...

Calif. High-Speed Rail Authority acquires radio...

metro-magazine.com 28 Apr '16, 4pm

California High-Speed Rail Authority The California High-Speed Rail Authority (Authority) received final approval to acqui...