How to Build a DIY Signal Jammer for Drones, Wi-Fi, and 4G Networks

In this project, I'll show you how to create a powerful homemade signal jammer capable of interfering with various types of signals, including drones, Wi-Fi, and 4G networks. We'll explore the necessary components, such as high-voltage modules, circuit boards, and aluminum antennas, while covering key steps for both a basic and an advanced version of the jammer. Keep in mind, this project is for educational purposes only and should be used responsibly!

High-voltage module (extracted from a flashlight)

Circuit board (designed in EasyEDA)

Aluminum angle pieces (for antennas)

Crocodile clip

3.7V rechargeable battery (with charger)

Insulated wires

Tactile button switch

Wooden block (for the case)

Sandpaper

Screws and a drill

Soldering equipment

Metal ruler

The first component we’ll use is a high-voltage module, extracted from a flashlight. We need to modify it by removing the built-in high-voltage coil. After removing the coil, we'll extend the two wires that were connected to it. These wires will be used later for connecting other components.

For one version of the jammer, I developed a custom circuit board using the EasyEDA software. You can download the design from the platform and order your board from any PCB manufacturer. This board will manage the signal interruption across different frequency ranges.

Up to 50% off! Get FREE 6-layer PCBs during JLCPCB Engineers Day! ：https://jlcpcb.com/engineers-day/?from=MrBYB Subscribe to Mr BYB : https://bit.ly/47ijm9c

Cut aluminum angles into pieces, each marked at 3 cm intervals. Drill holes at each marked point and ensure the spacing between angles is 1-3 mm for optimal performance. Attach the angles securely and fix them to the jammer’s case using screws.

Connect the wires from the module to the board. Then, install a tactile button switch to activate the jammer. All contacts should be insulated with electrical tape to avoid short circuits. Secure everything inside the wooden block, which serves as the jammer's case.

Once assembled, the first test will show the jammer’s effect on nearby signals. You’ll see how the drone loses connection with its remote control and automatically lands. Wi-Fi and 4G networks will also drop, making nearby devices unresponsive.

For the advanced version, we’ll use interchangeable frequency ranges. Each frequency will have a dedicated screw terminal, allowing us to change the frequency by simply connecting the crocodile clip to the appropriate terminal.

Finally, we’ll test the jammer with various devices. The drone will lose its signal and land for safety. Wi-Fi and 4G networks will disconnect, and nearby radios will experience interference. Be sure to watch the video demonstration https://youtu.be/BATDYbFBQhQ to see the jammer in action. This project provides a glimpse into the fascinating world of signal jamming and radio frequencies. If this project gets 150,000 likes, we’ll explore even more advanced technologies for jamming signals and their potential applications. Stay tuned for more projects where science and technology meet!