How to Make a Water Level Alarm
- 1). Cut three pieces of copper wire that are 6 inches long. Solid wire is better than stranded wire for this project but either will work. While almost any size of wire is sufficient, larger gauge wire will produce less resistance and give better conductivity.
- 2). Strip both ends of each wire 1/2 inch from the end.
- 3). Solder the first wire to the positive leg of the 9-volt snap connector.
- 4). Solder the second wire to the negative leg of the 9-volt snap connector.
- 5). Solder the free end of the second wire to the buzzer's negative terminal.
- 6). Solder the end of the third wire to the buzzer's positive terminal.
- 7). Punch two holes through the top of the plastic foam block with an awl or ice pick about three inches apart.
- 8). Stick the free end of the first lead through one hole and the free end of the third wire through the second hole in the plastic foam block. The stripped ends of both leads should be fully exposed below the bottom surface of the plastic foam.
- 9). Snap a 9-volt battery into the connector and secure the entire project to the top of the block with duct tape.
- 10
Mount the project in the desired location horizontally with exposed wires down.
