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  • Author Author: kk99
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Salt water cell

kk99
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Mixing Electronics & Water

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It is only general idea to create low power device with salt water cell as power supply. Here is example of salt water cell. It is made from:

- two glass containers,

- two copper electrodes,

- two silver electrodes.

Voltage generates by this two cell is around 1.5 volt. Here is example image:

image

I am thinking if it is possible to use this cell as power supply to electronic device like simple egg timer. Please comment below what you think about that.

 

Update:

It looks like that in current form salt water cell is able to generate voltage around 1.7 volt and current around 4-5 uA. As was mentioned in comments most important think is proper material and shape of electrodes. Here is video from quick test:

  • I just say an article about IBM usibg salt as a battery. Maybe it is based on this experiment.

    Clem

  • in reply to kk99

    You have to keep the water moving.

     

    If you just have a pool of water, the electrodes pull all of the charge carriers away from the atoms touching the electrodes so you have to keep bringing new atoms in contact with the electrode surface.

     

     

     

    DAB

  • I have changed electrodes to carbon one's.

    But still it is no enough to power supply MCU. Here is example of start atmega328 with 128 kHz clock circuit with simple LED blink program. This salt water cell allow to supply this circuit for the while.

    image

  • Yes, it looks like that usage of proper material for electrodes and their shape is one of important thing to get good results from this type of salt water cell.