10km FM Transmitter Circuit Diagram (🔴Live Proof) fm transmitter circuit

Diy Electronic

7 May 202207:06

Summary

TLDRIn this video from the DIY Electronics channel, you'll learn how to build a small, sensitive FM transmitter circuit capable of transmitting over long distances. The tutorial covers essential tips, like how to properly wind the copper wire coil and use a PCB for better performance. You'll also find instructions for ordering a free PCB from JLCPCB. The host demonstrates the transmitter in action, testing its signal on 92.7 MHz and showing how it performs at different distances, including on the roof. Don't forget to check the Gerber file and JLCPCB link in the video description.

Takeaways

🛠️ This video demonstrates how to make a small-sized, sensitive FM transmitter circuit that works over long distances.
🔄 The circuit diagram and tips for building the FM transmitter are provided throughout the video, so viewers are encouraged to watch until the end.
📋 A PCB is essential for the proper functioning of the transmitter, as without it, the circuit may not work effectively and may create noise.
🔧 The video explains how to wind the copper wire into 8 rounds using a screwdriver to create the coil, emphasizing the importance of keeping the wire terminals equal.
📡 The coil is a crucial component, and viewers are advised to troubleshoot their FM transmitter by focusing on this part if issues arise.
🖥️ The video shows how to order a PCB from JLCPCB by uploading the Gerber file, selecting options, and using a coupon code for first-time customers.
📶 The creator tests the FM transmitter at a frequency of 92.7 MHz, demonstrating clear signal reception even from a long distance, including from a rooftop.
🎶 Though the music quality on the video wasn't perfect due to microphone placement, the creator confirms that the FM signal output is clear.
📦 Viewers are encouraged to order their PCBs through the link in the description and receive a discount if they are new customers.
👍 The video concludes by urging viewers to like, subscribe, and visit the JLCPCB website for the PCB order and Gerber file.

Q & A

What is the main purpose of this video?
-The main purpose of the video is to teach viewers how to make an FM transmitter circuit and provide tips to enhance its performance.
Why is it important to use a PCB when making the FM transmitter circuit?
-Using a PCB is important because without it, the circuit might not work properly and may produce noise.
How is the coil for the FM transmitter made, according to the video?
-The coil is made by winding 8 rounds of copper wire around a screwdriver, and the ends of the wire are adjusted to be equal using tweezers.
What advice does the creator give if the FM transmitter doesn't work?
-The creator advises checking the coil carefully, as it is a critical component that could cause the transmitter to malfunction.
How can viewers order a free PCB, as mentioned in the video?
-Viewers can order a free PCB from the JLCPCB website by uploading the Gerber file, selecting the PCB quantity and colors, entering their address, and using a coupon code if they are new customers.
How is the FM transmitter signal tested in the video?
-The signal is tested by connecting the transmitter to a power supply, attaching an alligator clip to the antenna for a stronger signal, and tuning a mobile phone to 92.7 MHz to receive the signal.
What issue does the creator encounter while testing the FM signal, and what is the possible reason?
-The creator notices the music isn't clear during recording and believes the issue is due to keeping the microphone too close to the mobile device.
What steps does the creator take to demonstrate the range of the FM transmitter?
-The creator plays music on a mobile device and tests the signal strength by moving to different locations, including the terrace, where the signal is still received clearly.
What kind of music is used during the testing of the FM transmitter signal?
-The creator uses NCS (No Copyright Sounds) music while testing the FM transmitter signal.
What are the key takeaways from the video?
-Key takeaways include how to build the FM transmitter circuit, tips on improving signal strength and avoiding noise, the importance of using a PCB, and instructions on how to order a PCB for free from JLCPCB.

Outlines

00:00

🔧 Introduction and Building the FM Transmitter

In this introduction, the host welcomes viewers to the YouTube channel 'DIY Electronic' and introduces the topic of building a small but sensitive FM transmitter circuit. The circuit is demonstrated later in the video, along with a diagram and several tips for assembly. The host emphasizes the importance of using a PCB for optimal performance and shares advice on making the coil using a screwdriver and copper wire. Details on ordering a PCB from JLCPCB are also discussed, with a coupon code available for new customers. The host proceeds to explain how to equalize the wire terminals with tweezers and stresses that issues with the FM transmitter could be due to coil misalignment. Viewers are encouraged to stay tuned for the full circuit demonstration.

05:00

📡 Testing the FM Transmitter and Signal Reception

The host begins testing the FM transmitter by powering up the circuit and connecting an alligator clip to the antenna for a better signal. They set the frequency to 92.7 MHz and check the signal using a mobile phone. After adjusting the camera, they confirm the transmitter is working by playing a beeping sound due to a loop in the circuit. Moving on, the host plays non-copyrighted music and further tests the signal strength by moving to the terrace. Despite some audio recording issues, the host notes that the signal reception remains strong, and the music quality was clear off-camera. The video concludes with a reminder to like, subscribe, and visit the JLCPCB website for more details on ordering PCBs.

Mindmap

Keywords

💡FM Transmitter

An FM transmitter is a device that broadcasts a signal on an FM radio frequency. In the video, the creator demonstrates how to build a small, sensitive FM transmitter circuit that can broadcast music or audio signals over a long distance, using components like a PCB and a copper coil.

💡Circuit

A circuit is a closed path through which an electric current flows. The video focuses on creating an FM transmitter circuit, highlighting its construction with components such as a PCB, a copper wire coil, and a power supply, demonstrating how these parts work together to transmit FM signals.

💡PCB (Printed Circuit Board)

A PCB is a board that mechanically supports and electrically connects electronic components using conductive tracks. In the video, the creator emphasizes the importance of using a PCB to ensure the FM transmitter works properly, as it helps reduce noise and improve signal quality.

💡Copper Coil

A copper coil is a component made by winding copper wire into a spiral shape. In this FM transmitter project, the copper coil is a key part that influences the transmission quality. The creator demonstrates how to make the coil using a screwdriver and explains its significance for the transmitter's performance.

💡Gerber File

A Gerber file is a standard format used for PCB design and manufacturing. The creator of the video mentions that the Gerber file for the FM transmitter circuit is available in the video description, allowing viewers to order a custom PCB from a manufacturer.

💡JLCPCB

JLCPCB is a PCB manufacturing service that allows users to order custom-made printed circuit boards. In the video, the creator promotes this service, explaining how to order a PCB using the provided Gerber file and offers a discount code for new customers.

💡Frequency

Frequency refers to the rate at which a signal oscillates, measured in Hertz (Hz). In the video, the FM transmitter operates at a frequency of 92.7 MHz, which the creator tunes into using a mobile phone to receive the signal broadcasted by the transmitter.

💡Antenna

An antenna is a device used to transmit or receive radio waves. The creator connects an alligator clip to the antenna of the FM transmitter circuit to enhance signal strength and improve the transmission range of the broadcast.

💡Power Supply

A power supply provides the necessary electrical energy to a circuit. In the video, the creator mentions giving the power supply to the FM transmitter circuit, which activates it and enables the transmission of the FM signal to a mobile phone receiver.

💡Signal Clarity

Signal clarity refers to the quality of the audio being transmitted and received without distortion. The creator highlights that the FM signal is strong and clear when tested at different distances, such as on the roof, though the recording may not capture the clear sound as effectively.

Highlights

Introduction to creating an FM transmitter circuit.

The FM transmitter circuit is very small and sensitive, with long-distance range capabilities.

The circuit's performance is demonstrated at the end of the video, along with a circuit diagram.

Tips for building the FM transmitter circuit are shared to help with construction.

Using a PCB is essential for proper function and to reduce noise.

Instructions for making the coil with 8 turns of copper wire using a screwdriver are shown.

It is important to equalize the terminal ends of the wire for the coil.

If the FM transmitter doesn’t work, the coil is the primary component to troubleshoot.

Steps to order a PCB for free from JLCPCB are provided, with a link and coupon code for new customers.

The FM transmitter is tested at 92.7 MHz using an alligator clip as an antenna.

Beep sound demonstrates a loop in the circuit, followed by playing NCS no-copyright music to test the transmission.

FM signal works clearly even at a distance, with tests conducted on the terrace.

Explanation for unclear sound during recording due to microphone placement.

The actual output of the FM signal is very clear despite video recording issues.

Encouragement to build the circuit and a reminder to like, subscribe, and visit the JLCPCB website for PCB orders.