Variable Speed Fan With Snap Circuits, Kano Computer

In a previous How-To Guide I demonstrated how to blink a Snap Circuits LED with the Kano Computer...

IUPUI researchers use stem cells to identify cellular processes related to glaucoma

INDIANAPOLIS -- Using stem cells derived from human skin cells, researchers led by Jason Meyer...

Pi Day 2016 Project

For Pi Day 2016, I’ll demonstrate how to flash a Snap Circuits LED with the Kano Computer (my...

LIGO, Gravitational Waves, And Laser Interferometry

UPDATE: LIGO has detected gravitational waves. ...

In my previous article, Subscription Box Chemistry Set, I tested the Google Cardboard headset from the starter kit as a stereograph viewer with stereographs I found online. Unfortunately, the screen widths for my iPod and Android phone were too small to use with the Google goggles. So I decided to build my own stereograph viewer with parts from my Lego optics lab.

The build was very simple (see picture above). I used the following parts from my Lego optics lab:

You’ve probably had subscriptions to newspapers, magazines, or even Netflix. Fairly recently the subscription box has emerged like Loot Crate, filled with Sci-Fi/Fantasy/Comic book themed T-shirts, mugs, minifigures and such. Now there’s a subscription box chemistry set from MEL Science.

“We have reinvented educational chemistry sets for kids,” says Vassili Philippov, CEO of Mel Science. “It includes chemical reagents for real experiments, a mobile app, and a virtual reality headset to let you visualize molecules in 3D.”

If you live in Indiana, or at least near Indianapolis, you should go to the Celebrate Science Indiana science festival in the Blue Ribbon Pavilion at the Indiana State Fairgrounds Saturday 3 October 2015 from 9:30am-5:30pm—it’s free.
In my previous article about Birdsnap, the app was unable to identify my hawk because I did not get a full profile of the bird. Now that it's autumn and Canada geese have begun migrating, I’ve had some opportunities to photograph birds and get close enough to be able to photograph them properly in profile.

Here’s a goose I took a picture of on South Grove Golf Course in Indianapolis on Wednesday:

Last week the European Space Agency announced the launch of its Lisa Pathfinder mission later this year to test if laser interferometry can be used in space to detect gravitational waves. It's fairly easy to build a laser interferometer so I decided to build one for my Lego optics lab.

A table-top interferometer will not be able to detect gravity waves because there is too much noise in the surrounding environment and you need a really big laser interferometer to distinguish between gravitational waves and such mundane things as earthquakes, traffic passing by, or someone dropping a coffee mug in the kitchen. The LIGO, or Laser Interferometer Gravitational-Wave Observatory, is an interferometer whose arms are four kilometers (well-nigh 2.5 miles) long.

I’ll demonstrate how I built my mobile phone/iPod mount out of Lego for my Lego optics lab polariscope project.

Parts needed:

Mobile phone mount (from my DIY Super Selfie Stick project)
2 Lego plates 1 X 8
4 Lego beams 1 X 2
4 Lego Beams 1 X 8

Here’s how I built my Lego mobile phone/iPod mount: