Nostalgia Time
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A Trip Back in Time. My middle son, Tim and his lovely Amy visited
yesterday as we celebrated the 4th of July. Several visits ago, Tim
mentioned some items...
5 hours ago
Serving the worldwide community of radio-electronic homebrewers. Providing blog support to the SolderSmoke podcast: http://soldersmoke.com
Dude, use a black pen next time.
ReplyDelete73.......Steve Smith WB6TNL
Neat ! I did that experiment with sound waves as a science project back in 1972. Used a mic pickup on the end of a yardstick which was mixed with a reference tone. Another amp from the mixer out drove a neon lamp next to the mic. I took "pictures" of sound waves using a long exposure on a Polaroid camera and sweeping the mic/lamp in front of a speaker driven by the reference tone. Won second prize in the science fair !
ReplyDeleteRich VE3MKC