The Gravity Light was developed to replace the use of kerosene lamps in the developing countries. It uses a weight to drive a train wheel and generate electricity from the kinetic energy generated. Now, a new version of this safe, inexpensive and convenient lighting solution was created.
The original Gravity Light is hung in a room and attached to a weighted bag on a hook at its underside. The bag, which is filled with stones or sand, with a winch, and then gradually increases at a rate of about 1 mm (0.04 inches) per second. This drives a low-speed high-torque drive gear which, as they travel through the gears is able to drive a DC generator at thousands of revolutions per minute.
The process is intended to generate just under a tenth of a watt, a deciwatt which is to be driven in a position to an onboard LED and accessories. The LED is supposed to produce the brightness of a kerosene lamp in a position five times and if the weight hits the ground, it can easily back up, so that the process be restarted boost.
The company behind the Gravity Light says it received a lot of feedback on the first version and has been able to improve it accordingly. The new version of the device is easier to use, is brighter, more robust and durable.
A new roller system is incorporated, making it easier for users of any height or strength to lift the weight up to do, so that the maximum hang time. Studies found that some users do not do this with the Original Gravity Light. The pulley system also means that the light to remain on even when the weight is lifted, something that was not previously the case.
The LED in the Gravity Light 2 is said to be lighter than the previous version, but twice as energy efficient. The three different brightness settings that have been found to be largely untapped, were abolished, and the light will be the road for 1.5 times as long.
Finally Gravity Light says it some of the wear-and-tear problems that had some users of the first version of reports has been activated. After testing different materials, tooth geometries and arrangements, the company said the new design will last longer.
A Indiegogo crowdfunding campaign was launched to build assembly lines for the Gravity Light 2 in Kenya. As of this writing, plans for a Gravity Light 2 are under US $ 70 or more. If all goes to plan, the delivery time is estimated for May 2016.
You can see for Gravity Light 2 pitch video.
Sources: GravityLight, Indiegogo
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