Collect magnetic alarm for 4M doors & ndash; this is a research kit from the Kidz Labs series (children's laboratory) for boys and girls 5-7 years old.
Assemble the alarm in the kit according to the instructions (only 11 items with pictures) and equip your room with a useful device. This magnetic alarm beeps when you open the door to warn you about entering the room.
Details in the kit
Part A: base x 1, part B: cover x 1, part C: magnet x 1, part D: magnet holder x 1, part E: set of plates with lugs x 1, part F: battery cover x 1, part G: adhesive tape, part H: metal disk x 1, part I: terminal covers x 3, part J: screws x 3, part K: screws with washer x 2.
Optional: 2 AAA batteries, small Phillips screwdriver.
How it works
The disc is made of steel, magnetic metal, attracts a magnet. When the door is closed and the triangles on the magnetic holder and base are aligned, the disc is attracted by the magnet to one side of the lug area. When the door opens, the magnet moves away from the base, and the gravitational force of the magnet ceases to be strong enough to hold the disc. The disk rolls into the lower part of the ear area and rests on two outputs. This acts as a switch, closing the circuit and allowing current to flow through the buzzer.
Many real home alarms use similar magnetic sensors to detect when doors or windows open and close. The signal from the switch goes to the alarm control unit. These and other brief facts about the topic can be read in the instructions for the kit.
In the process of assembling the device, children will train design skills, ingenuity, accuracy of hands, the ability to follow schemes and plans. This develops perseverance, attentiveness, the ability to complete the work started, confidence in their abilities.
Assembling the alarm, children learn about the operation of the electrical circuit and get acquainted with physics. 4M research kits engage children in science and broaden their horizons.
