Simple method of secondary clocks and watches

The simple method of seconds is as follows:

1. Material preparation: blank cardboard (used for clocks and watches), colored pens (used for drawing clocks and watches numbers and hands), scissors (used for paper-cutting boards and hands). Glue or double-sided tape (used to fix hands) Small round objects (such as beads or chess pieces, used to simulate the movement of hour and minute hands).

2. Draw a clock plate: Draw a circle on the cardboard, which will be used as the clock plate. The size of this circle can be determined according to your preference, but generally speaking, a circle with a diameter of 15-20 cm is more suitable. Draw 12 numbers evenly in the circle, representing 12 hours of the clock. You can write the number 1- 12 with crayons.

3. Making pointer: Cut out two cardboard strips with scissors, about 20 cm long. These cardboard strips will be used as hour and minute hands. Draw an arrow on a cardboard strip to indicate the position of the hour hand. This arrow should be in the middle of the cardboard strip. An arrow is also drawn on another cardboard strip to indicate the position of the minute hand. This arrow should also be in the middle of the cardboard strip.

The origin of clocks and watches

1, ancient clocks and watches: Before clocks and watches appeared, people used various methods to time. For example, they can use a sundial to judge the approximate time, or use a water clock to measure the time in an hour. In addition, there are some mechanical devices, such as candle clocks and sand clocks, which can also be used for timing. However, these methods are not as accurate as clocks.

2. Medieval mechanical clocks: In the Middle Ages, with the development of mechanical engineering, mechanical clocks and watches began to appear. The earliest mechanical clocks can be traced back to China and Europe in the 3rd century. These first-generation mechanical clocks are very simple and usually consist of a wheel with a heavy object, which will turn over time.

3. The rise of the bell tower: In Europe, the bell tower of the church began to install large mechanical clocks and watches. These clocks can tell the time, and can also be used to inform residents of various important events, such as prayer time or public activities. These clocks are usually made by local watchmakers, who constantly improve and innovate to make them more accurate and complex.