Water watch update.

[stevensrd1]

Here is an improved version of my water watch. http://www.youtube.com/watch?v=UFPaWuuvrYU

[Cherryman]

Try adding carbon.

These guys have a mixture of Magnesium, Carbon and water.

http://www.youtube.com/watch?v=Ums8IDFucy8

[stevensrd1]

I seen that video, neat, but I like the do it yourself activities, thats why I made my water watch, which only needs the water changed once every say two weeks or so. The electrodes I use should last several years considering they are only immersed in water. I have seen a digital water watch on the market however, it was not expensive really, but if you dont have hands on experience, you sometimes dont really understand whats going on or how it works.

[lwh]

Good idea using the capacitor to help maintain the power during the water change.  How long would it take for the capacitor to get loaded up initially and does the capacitor re-charge while the water battery is still powering the watch? 

Had a look at those other water batteries too, but wasn't really impressed.  They have a higher voltage, but can only be refilled/recharged up to 5 times and it doesn't say how long they'll run for.   Looked at some of the other water-powered products that are around too, and didn't see anything I'd actually want to buy.  Also read that some of the so-called water-powered devices just use the water to complete an electrical circuit generated by a hidden battery in the device.  There might be some legit products out there, but I didn't see anything that really plays to the strengths of this kind of simple, straightforward, 'renewable' source of energy.

Thanks again Stevensrd1 for bringing this technology to my attention and for explaining how it works in easy to understand terms.

[stevensrd1]

when I last changed the water, which seems it needs it least once a week or every other week,,depends, the display was a bit dim, after the water change in like 5 or so minutes it was back fully bright. So I would estimate it takes that long to fully recharge when the electrodes are back in the water. And yes the power in the capacitor comes from the water, I have never added any external charge to it. So the water keeps it charged up,,and then when you need to change the water it will hold time a few minutes,,more then long enough to empty the old water and add new water.