I made an air cannon

I made an air cannon last summer, and though it’s fun to shoot nerf darts at inane speeds for hours, it’s a little difficult to quantify exactly how fast “really frickin’ fast” is without a high speed camera or professional speed measurey thing. To that end, I created this, my own speed measurer with only a dozen or so common parts.Step 1: TheoryThis project uses two infrared emitter phototransistor pairs, spaced precisely three inches apart. By measuring the time it takes for the object to break each beam, the speed of the object can be calculated.

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led screen 32 Richard Bachman, 3. Finally rewarded with a start a month into his emergency recall. Had a solid first period stopping a few shots from the slot including one with his melon, while making a couple of fine pad stops on low angle shots. Opened in Hawaii in 1910 and was known as an importer of Japanese goods, such as ceramic plates and traditional Ichimatsu dolls, which kept local Japanese plantation workers connected to their roots in Japan. Over the last century, it’s become a store specializing in Japanese magazines, books, and manga (comics), but also carrying pens, stationary, arts and crafts, stuffed animals, toys, and other Japanese imports.Hakubundo in Pearlridge Uptown will also be donating the origami art, along with a portion of its sales from September 9 to 30, 2017, to the Community Association. On Sunday. led screen

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