Very simple and practical water level alarm, using only a few small components. The diode is connected to the relay coil.
Solder the battery wire, orange positive and yellow negative.
Water level sensing line.
Alarm control line, high water level alarm is connected to normally open, and low water level alarm is connected to normally closed.
Power-on test, the alarm light is on when the sensor line is soaked in water.
Production of water level alarm 2Materials: The main materials used are battery boxes, batteries, magnetic switches, magnets, buzzers, foams and wires, paper cups, etc.
Steps: First, connect one end of the magnetic switch to the red wire of the battery box, and connect the other end to a separate red wire; then, connect the negative (short leg) of the buzzer to the black wire of the battery box, the positive (Long foot) is connected with the red wire of the magnetic control switch to form a complete circuit, and then all the interfaces are sealed and fixed with electrical glue, and the battery is installed.
Secondly, use paper clips and transparent glue to fix the magnetic switch on the outside of the paper cup; finally, make a hole in the foam, fix the magnet inside, and put it into the cup; in this way, a water level alarm is completed.
Next, I started the experiment. I slowly poured water into the cup, and the water slowly rose, and the bubbles and magnets also floated up. After reaching a certain level, the buzzer began to beep. Without stopping, the experiment was successful.
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