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paulhunn
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Can anyone shed any light on how this water powered calculator works please? http://www.thinkgeek.com/gadgets/electronic/7c17/
Thanks, Paul
Thanks, Paul
LURCH said:Electrodes coated with NiHM; when emersed in water, they produce ellectric charge.
paulhunn said:According to the article its permanent as long as you replace the water when needed. It couldn't run indefinatly because that would constitute perpetual energy i.e energy generated from nothing.
Nickel Metal Hydride batteries are one kind of recharble batteris. There are three basic type of rechargable batteries used in radio control models. The classic ones are Ni-Cads, later NiMH batteries came out and had more capacity for the same weight, but I think there was a current limit. Other than high powered electrics, which draw 80 amps or so, the NiMh batteries work in most applications. The latest technology for rc stuff is Li-Poly batteries. Li-Polys give you the most capacity for the weight and packs consist of a combination of cells combined in parallel (more current) and/or in series (more voltage). Special car is needed for these batteries, Ni-Cads are the hardiest, the main issue is not to drain them much below .9 volts per cell. NiMH batteries can be permanently damaged from overcharging (and maybe over draining, not sure on this one). Li-Poly's will explode under certain conditions. Nicads can be charged with simple brick chargerss, but you need "smart" chargers for NiMH and Li-Poly cells. When charged, Ni-cads are about 1.2 volts per cell, Ni-MH's are about 1.1 volts per cell, and Li-Poly's are about 3.7 volts per cell. Just like any battery, the voltage drops as current load increases. Capacity also is affected by the current load.Pengwuino said:I'm talking about the NiMH.
Yes, but just like any conventional battery, metal is moving from one electrode to the other, eventually you run out of metal. As mentioned before, life span is 2 years for these batteries.Pengwuino said:Jeff, the device works by water alone. The assumption is that there is a NiMH layer inside promoting the electrolysis creating the electricity.
A water powered calculator is a type of calculator that uses water as its source of energy instead of traditional batteries. It works by converting the energy from the water into electrical energy to power the calculator.
A water powered calculator uses a chemical reaction between water and a metal, such as zinc, to create an electrical charge. This charge is then used to power the calculator, allowing it to perform calculations just like a regular calculator.
One of the main advantages of using a water powered calculator is that it is environmentally friendly. It does not require the use of batteries, which can be harmful to the environment when disposed of. Additionally, it is a renewable energy source, meaning that the calculator can continue to be used as long as there is access to water.
While water powered calculators are a great alternative to traditional battery-powered calculators, they do have some limitations. They are not as powerful as some other calculators and may not be suitable for complex calculations. Additionally, they require a constant supply of water to function, which may not always be readily available.
Yes, the technology used in water powered calculators can also be applied to other devices such as clocks, radios, and flashlights. These devices would also use water as their source of energy instead of batteries, making them more environmentally friendly and sustainable.