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Homemade GPS Jammer

How To Make A Homemade GPS Jammer In 4 Simple Steps

If you’re concerned about being tracked by a GPS device or want to protect your privacy, you might be interested in building your own GPS jammer. These devices emit radio frequencies, disrupting GPS signals. In this article, you’ll learn how to craft a homemade jammer. But a word of caution: using such devices is illegal in many places, especially the U.S. Tracking System Direct stresses that our guide is purely educational. We take no responsibility for your actions if you choose to build a homemade GPS jammer and use it. Again, we ask you adhere to all laws and regulations at all times. Now, with that disclaimer out of the way, let’s go over the 4 easy steps on how to make a homemade GPS jammer.

Parts You Will Need To Build A GPS Jammer

NE555 Timer IC - Homemade GPS Jammer

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Starting your project to build a GPS jammer requires careful preparation. To ensure a successful build, gather all the essential components first. In the following section, we’ll detail the items you’ll need, breaking down their specific roles in the assembly process.

  • NE555 timer IC: Used to produce pulse-width modulation and generate time delays or waveforms. You can learn more about this electronics component here.
  • 47 pF ceramic capacitor & 0.01 μF ceramic capacitor: Store and release electrical energy, aiding in filtering and stabilizing the voltage.
  • 10 KΩ resistor & 220 Ω resistor: Restrict the flow of electric current, setting currents and dividing voltages. Learn more about this here.
  • 100 μF electrolytic capacitor: Acts as a buffer to smooth out voltage fluctuations due to its larger charge storage capacity.
  • Red LED: Serves as an indicator, emitting light to show power or signal status.
  • 9-volt battery: Powers the assembled components.
  • Breadboard: Allows for the prototyping and testing of circuit designs without soldering.
  • GPS receiver module and antenna: Used for testing purposes to check the effect of the assembled circuit.

Helpful VideoHow To Use A Breadboard

Build The Circuit

Initiating the actual build process, the breadboard becomes your primary workspace. This tool provides a convenient platform, ensuring that you don’t need to solder components together during the initial testing phase.

  • Understanding the Breadboard. Familiarize yourself with the breadboard’s layout. Typically, it has rows and columns of holes, and internally, they’re interconnected to allow for easy circuit connections.
  • Schematic Diagram. Before inserting any component, take a moment to review the GPS jammer’s schematic diagram. This visual guide illustrates where each component should be placed and how they connect.
  • Placement & Connection. Start by inserting the NE555 timer IC onto the breadboard. Following the schematic, methodically place each capacitor, resistor, and LED in their respective positions. Utilize jumper wires to create the necessary connections between them.
  • Signal Generation. Once assembled correctly, this circuit is designed to produce a radio frequency signal. This signal operates on a frequency that disrupts or “jams” the standard frequency used by GPS satellites.
  • Testing. Before proceeding to the next steps, power the circuit using the 9-volt battery. The red LED should light up, indicating that the circuit is operational and generating the desired radio frequency signal.

Add a VU Meter

Add a VU MeterA VU (Volume Unit) meter plays a pivotal role in the jamming process. Not only does it add a visual component to your circuit, but it also ensures the signal you’re producing meets the necessary strength.

  • Purpose of the VU Meter. In the context of your GPS jammer, a VU meter measures and displays the intensity of the radio frequency signal your circuit generates. This measurement is crucial as the effectiveness of the jammer depends on its signal strength.
  • Choosing a VU Meter. While there are various types of VU meters available, ensure you select one compatible with your circuit’s output voltage. Consider meters with a broad range of sensitivity, allowing you to see both strong and weak signal outputs.
  • Integration into the Circuit. Place the VU meter’s input terminals in line with the output of your jammer circuit. This positioning will capture the exact strength of the signal being emitted. Ensure the connections are secure to avoid inaccurate readings.
  • Reading the VU Meter. Once integrated, power up your circuit. The VU meter’s needle or LED indicators should respond, showing the signal’s strength in decibels (dB). Familiarize yourself with the readings, understanding that a higher dB indicates a more potent signal.
  • Calibration. Some VU meters allow for calibration. Adjusting the meter ensures that you get precise readings, optimizing the performance of your GPS jammer.

Testing Your GPS Jammer

Testing GPS Jammer

Photo Courtesy: EverythingRF

The culmination of your efforts is in the testing phase. It’s crucial to ensure that the device you’ve constructed functions as intended and effectively jams GPS signals.

  • Preparation.Before jumping into testing, make sure your environment is safe. Keep other sensitive electronic devices away to prevent unintended interference.
  • Activating the Jammer. Turn on the jammer. Pay attention to any indicators like the red LED, which can give immediate feedback on its operational status.
  • Using a GPS Receiver Module. Have a GPS receiver module or any device with GPS functionality on hand. Ensure the device has a clear signal before introducing the jammer. This is your baseline. As you bring the jammer closer, monitor the GPS device. Signal disruption or loss indicates the jammer is working.
  • Observation. Beyond just a complete signal loss, look for other signs like slower update times on the GPS module, or if the device may display a “searching for signal” status. There could be a noticeable drop in the number of satellites the GPS module detects.

Safety Precautions:

Whenever dealing with electronics, especially devices like jammers which can interfere with essential communication equipment, safety is paramount.

  1. Handling Electronics: Always ensure your workspace is dry and free from water or other liquids to prevent short circuits.
  2. Avoid Prolonged Exposure: Prolonged exposure to the jammer’s signal is not recommended.

Troubleshooting Tips:

As with any DIY project, there’s always a possibility that things might not work as expected.

  1. Check Connections: Ensure all components are securely placed on the breadboard.
  2. Battery Power: Ensure the 9-volt battery is fresh and providing the necessary power.
  3. Review the Schematic: Double-check your connections against the schematic diagram.

A Brief History of GPS Jamming Equipment

GPS jamming equipment has been around for many years and was initially used by military forces to disrupt enemy GPS tracking devices. However, as GPS technology became more widespread and accessible, GPS jamming devices became available to the general public. Today, GPS jammers can be purchased online or in some physical stores, but they are illegal in many countries, including the United States. Nevertheless, some people still opt to build their own GPS jammers for personal use.

Related Article: Does Aluminum Foil Block GPS Signals?

Legal and Ethical Considerations Of Jamming GPS Signals

Okay, so you want to make your own jamming device so your boss can’t see where you are going. Makes sense. Even though GPS devices are typically used for fleet management purposes, you want your privacy. Unfortunately, GPS jammers are illegal in the United States. In fact, the Federal Communications Commission (FCC) prohibits the marketing, sale, and use of GPS jammers. Violating this regulation can result in fines and even imprisonment. Additionally, using a GPS jammer can interfere with legitimate GPS signals used by emergency responders and other essential services, putting lives at risk. Therefore, it’s important to use GPS jammers responsibly and only for personal use in areas where it is legal to do so.

Homemade GPS Jammer
Homemade GPS Jammer


GPS jammers are a controversial tool that can be used to disrupt GPS tracking and protect privacy, but they come with significant legal and ethical concerns. GPS jammers are illegal in many countries, including the United States, and can interfere with legitimate GPS signals used by essential services. Using GPS jammers or other signal blockers can also lead to unintended consequences, such as blocking cell phone or WiFi signals, which can cause further disruptions.

While the allure of a DIY GPS jammer using materials from a dollar store may be tempting, it’s important to weigh the risks and benefits before taking any action. There are other options available, such as GPS blockers, that can protect the privacy and prevent GPS tracking without interfering with legitimate signals. These blockers use advanced technologies like frequency ranging to selectively block specific GPS signals and can be used in a more targeted manner.

Ultimately, using GPS jammers or other signal blockers should be avoided due to their potential legal and ethical implications. It’s essential to prioritize safety and responsible use of technology when considering any action that could impact others or disrupt important communication networks.

While GPS jammers may seem like a quick and easy solution to protect your privacy and prevent GPS tracking, the risks, and consequences associated with their use make them an unwise choice. Instead, consider alternative options that provide similar functionality without interfering with legitimate GPS or other signal networks.


Are GPS Jammers Legal?

Yes, GPS jammers are illegal in many countries, including the United States. The Federal Communications Commission (FCC) prohibits the marketing, sale, and use of GPS jammers. Violating this regulation can result in fines and even imprisonment.

What Is A GPS Signal Blocker?

A GPS signal blocker, also known as a GPS jammer, is a device that emits radio signals on the same frequency band as GPS satellites, thereby disrupting GPS signals and rendering GPS tracking systems useless.

Can GPS Jamming Equipment Block All Satellite Signals?

No, GPS jammers typically only block signals on a specific frequency band, such as GPS L1. Other satellite signals, such as those used by GLONASS or Galileo, may still be received.

Can Jammers Also Block Mobile Phone Signals?

Yes, some GPS jammers are designed to also block mobile phone signals, and are known as mobile phone signal jammers or cell phone jammers. However, these devices are also illegal in many countries, including the United States.

Is It Possible To Make A DIY GPS Jammer Using Inexpensive Materials?

Yes, it is possible to make a DIY GPS jammer using inexpensive materials, including those that can be found at a dollar store. However, it’s important to note that GPS jammers are illegal in many countries, including the United States, and using them can interfere with legitimate GPS signals used by emergency responders and other essential services, putting lives at risk.

Ryan Horban
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