The parameters are as follows:
1. If you want to set an alarm clock, you just need to prepare an alarm clock with alarm function in advance. , so you can complete the following steps.
2. You can see that there are rotary buttons on the back of the alarm clock. These two buttons can set the time. You need to use them to set the alarm time.
3. The next operation is to turn the alarm selection knob to set the desired alarm time.
About the alarm clock
The clock was invented by Libby.
Primitive people judged the weather based on changes in the color of the sky and the brightness of the sun.
The ancient Egyptians discovered that the length of shadows changes over time and invented a sundial to tell the time in the morning. They also discovered that the flow of water takes a fixed time, which is why they invented water. horlodge.
The ancient Chinese also had a tool that used water to measure time: a copper kettle dripper. They also used burning incense to measure time. They placed the incense horizontally and put a rope with steel balls on it. which had a function indicating the time.
The first mechanical clock driven by weights appeared in a monastery in England in 1283.
Monks in northern Italy began building bell towers (or steeples) in the 13th century, with the aim of reminding people of the time of prayer. Table clocks began to appear in Germany in the mid-16th century.
These clocks had only one hand and the clock face was divided into four parts so that the time was accurate to within 15 minutes. In 1657, Huygens discovered that the frequency of the pendulum could calculate time and created. the first pendulum bell.
In 1670, the Englishman William Clement invented the anchor escapement. In 1797, American Eli Terry received a patent for a clock. He is considered the ancestor of the American watch industry.