Homemade transmitter (Translated Version)

Homemade transmitter (translated version)

Introduction:

Building up a transmitter is very good and small technological exploration, and the principle is very simple. The two dry batteries are connected in series with a push button switch and an electromagnet.

Aim:

1. To let the students know the names and characteristics of the electric elements.

2. To help the students to understand the meaning of Morse Code.

3. Through this experiment, to train the practical ability of the students in order to be able to complete the project independently.

4. Through this experiment, to train the students’ ability in observation, logical thinking and reasoning.

Principle:

Sending telegram is one type of telecommunication service. It was invented by the American painter and telegraph inventor Mr. Morse. It was the earliest method to help humans to communicate with each other through electricity. It use Current (wire), electromagnetic wave (wireless) to fulfill the long distance communicate and exchange the messages through Morse Code and interactively electric skill.

How to Set Up:

Step 1

Step 2

Step 3

Step 4      + postive pole. Long leg; postive pole. Long leg

Step 5

Step 6 completed

 Planning:

We know that the telegram sends information by the length of the two sounds (or signals) of "Di" and "Da". And our small transmitter, according to the sound interval between the two collisions of the iron piece, can distinguish the long or short sound, so as to achieve the purpose of sending information.

Brainstorming:

Do you know how the transmitter sends the telegram and how the receiver does receive the telegram?