RF transmitter and Receiver

Wireless and IoT RF and Wireless
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Hi, I need some help for creating a transmiter and receiver circuit for my son high school engineering project. Main requirements are: 1) use minimum components as possible for RF transmitter and Receiver. 2) minimum input for transmiter are 4.
Can somebody help me for this this project?

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Hello Cittaratha, welcome to the Tech Forum.

Here are some tutorials on how to create a transmitter/receiver circuit that should prove helpful for you. Good luck with your project!

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