News post & update: eleccircuit.com |  |
| Posted: 18 Mar 2014 10:20 PM PDT This is a simple high level water alarm circuit diagram which we need to build it since: Outdoor fish pond The water level will drop rapidly. We need to check the water level regularly. The water had to be done very carefully. Should not be too hard to turn the tide The fish had Popper. […]  |
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