Perceptual chronograph

posted Jun 11th 2008 2:00am by Eliot Phillips
filed under: misc hacks


All praise to [Limor] for uncovering this incredibly odd project. [magician]’s perceptual chronograph is designed to test whether time “slows down” in stressful situations. The device flashes a random number on the display very quickly so that it is impossible to perceive what is actually being displayed. If you can read the number while under stress, it means that your ability perceive time has increased. It’s hard to believe, but check out the video embedded after the break that investigates the phenomenon. We can’t help, but wonder how [magician] personally plans on testing this.

Read the rest of this entry »

DIY ballistic gel

posted Jun 2nd 2008 10:00pm by Sean Percival
filed under: misc hacks


Earlier today, we looked at DIY ballistic glass, so we decided to look into DIY ballistic gel as well. Anyone who watches Mythbusters is probably already well familiar with their extensive use of this wonderful gel. Turns out the stuff is beyond easy to create at home. With some gelatin molds (and firepower) you could have a lot of fun with it.

To get started, pick up a box of gelatin powder from your local supermarket. Using 8 oz. of the powder and 2 quarts of cold water, stir together until the consistency is thick and all powder moist. Then, place the mixture in the fridge to chill for two hours. You will then need to heat the mixture until melted; be sure the liquid does not exceed 130 degrees. Finally, apply a layer of nonstick spray to your favorite mold or tupperware, and pour the mixture in. Allow to set in the fridge for 36 hours before use.

If you want even more DIY ballistics, check out this nice guide to creating your own chronograph, for measuring bullet velocity. After the break are videos on making and, of course, shooting the final product.

Read the rest of this entry »




Hack a Day serves up fresh hacks each day, every day from around the web and a special How-To hack each week.

Send us your hacks