Brand Name:icchipcn.com
Condition:New
Type:Logic ICs
Purpose:
1. Know Morse code.
2. Use the telegraph to send or receive training, games, etc. +
3. Understand the connection of the wireless telegraph.
Experiment equipment:
A pair of wireless telegraphs.
Submit questions:
In 1838, Samuel Morse invented the first device that could transmit encrypted messages over wires, later known as the Morse code telegraph. How did the telegraph transmit information?
Conjectures and assumptions:
1. The telegraphers of the two places must be familiar with the password.
2. At the same time, only one party can press the key to send the message, and the other party can only watch, listen, and interpret the content of the message.
Experiment procedure:
1. The design is simple, and the wireless telegraph function is realized. Connect the battery box and plug in the power supply. After the sender presses the switch, the receiver turns on the switch, the LED will light up and the horn will sound. By looking and listening to the length of light and sound on your own side and comparing the password, you can know the information transmitted by the other party. The recipient does not press the green switch.
2. Students can practice sending or receiving in pairs. Encourage students to try and practice more.
Explore questions:
1. Study the characteristics of Morse code.
2. Understand the sending rules and master sending skills.
3. Use common electronic components to design simple circuits.
Extracurricular Activities:
You can also use other electronic components or other methods to design a telegraph that can communicate information between the two places.
Precautions:
The power switch must be turned off after use. When the telegraph is not used for a long time, the battery should be taken out and stored.
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