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

Summary

In 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.