The children are making alarm clocks by hand.

The manual production process of children's alarm clock is as follows:

1. Draw an alarm clock on the cardboard.

2. Cut along the drawn alarm clock.

Draw a scale on the cut alarm clock.

4. Cut two pointers, one big and one small, from the cut cardboard.

5. Punch a hole in the top of the pointer and fix it on the dial with small screws.

6. After trimming the corners, the alarm clock will be ready.

Introduction of alarm clock

An alarm clock is a kind of clock with an alarm device. It can not only indicate the time, but also send out sound signals or other signals according to people's predetermined time. The movement structure of alarm clock mainly includes mechanical and timely electronic. Other types, such as transistor hairspring and tuning fork, are rarely used. They are called desktop alarm clocks that are usually placed on the table and travel alarm clocks that are mainly used for travel.

The time error of daily mechanical alarm clock is generally within 120 seconds/day, while the time error of timely electronic alarm clock is generally within 0.2 seconds/day. There are many kinds of alarm clocks, mechanical and timely. Since people invented it by using the principle of pendulum, it has become an indispensable item in people's lives.

The inventor of the alarm clock is an Indian teenager named Sankalp Sinha. In order to prevent oversleeping after pressing the alarm button, he tried to install an electric shock device on the alarm button, either listening to the alarm or being shocked. In fact, this alarm clock is weaker than 50,000-volt batons and 654.38+ 10,000-volt Pikachu, and the electric shock it gives will only make your fingers slightly numb.