Fountain

Gravity Defying Drips of a Bike Pump Controlled Fountain

People love to see a trick that fools their senses. This truism was in play at the Crash Space booth this weekend as [Steve Goldstein] and [Kevin Jordan] showed off a drip fountain controlled by a bike pump.

These optical illusion drip fountains use strobing light to seemingly freeze dripping water in mid-air. We’ve seen this before several times (the work of Hackaday alum [Mathieu Stephan] comes to mind) but never with a user input quite as delightful as a bike pump. It’s connected to an air pressure sensor that is monitored by the Arduino that strobes the lights. As someone works the pump, the falling droplets appear to slow, stop, and then begin flowing against gravity.

Sadly this phenomenon is quite difficult to record in a video since the latency of our vision is integral for the trick to work. The frame…

World’s Hottest Market: Air Conditioners For India And Hundreds Of New Electric Plants To Power Them

Putin Says Russia To Join OPEC Production Cut

An Indian man sits under the cascading water of a fountain in a decorative shallow pool adorning the gardens surrounding the India Gate monument on a hot Indian summer afternoon in New Delhi on May 20, 2016. (Photo by Roberto Schmidt/AFP/Getty Images)

An Indian man sits under the cascading water of a fountain in a decorative shallow pool adorning the gardens surrounding the India Gate monument on a hot Indian summer afternoon in New Delhi on May 20, 2016. (Photo by Roberto Schmidt/AFP/Getty Images)

India is poised for an explosion in room air conditioning that may require as many as 300 new electric power plants in the next 10 to 15 years, according to a Lawrence Berkeley National Laboratory specialist in international energy.

The country is likewise poised to avoid the costs of such an explosion—including billions of tons of carbon pollution—by deploying new air conditioners that are super efficient, that use refrigerants friendly to the climate, and that are powered by renewable energy, said Nikit Abhyankar, a senior scientific engineering associate at LBL.

“All the cities are very hot and very populous, which means that going forward, as people get richer, the demand for room air conditioning is going to be increasing,” said Abhyankar said in an April seminar hosted by the Stanford Precourt Institute of Energy. Stanford released video of the seminar Friday.

“ACs are the first appliance people want to buy when they cross a certain income threshold.”

Millions of Indians are expected to cross that threshold in the next 10-15 years, so analysts expect demand foer room air-conditioner demand akin to the surge in China around the turn of the millennium. Urban Chinese purchased 200 million room air conditioners in 15 years, creating—with just one appliance—300 GW of electric demand, the equivalent of six Californias.

In India, air conditioning is expected to double the country’s electricity demand in 15 years, requiring 200-300 new electric plants for…

Dr Pepper Fountain

Image: Emily Starkey/The Collegian

Kansas State student Claire Daniels loved Dr Pepper soda so much that she tweeted, “I really just need to have a Dr Pepper fountain installed in my house. That would probably be cheaper than how much I spend on it currently.”

Well, be careful what you wish on Twitter, because Dr Pepper saw that tweet and decided to make it a reality:

Just one month after…