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February 13, 2023

How to Disassemble a “GPS Jammer” Mini Device

If you spend enough time browsing the internet for interesting electronic devices to take apart, you’re bound to come across some questionable gadgets. That’s how I recently heard about these tiny GPS jammers that plug directly into an automotive 12 V outlet. For around $40 USD, they can be shipped to your door.

But what legitimate uses might such a device have? From what I’m aware, none. The only reason someone would want to jam GPS signals in and around a vehicle is if they’re trying to do something they shouldn’t. For example, someone might be looking to disable the integrated GPS on the car they just stole long enough for them to take it to the chop shop.

Despite the questionable nature of the device, we can still investigate and experiment with it. Let’s take a look and see what it can do!

How GPS Jammers Overpower Weak Signals from the GPS satellites

Given the fact that GPS satellites are located at an average altitude of 20,200 km (12,550 miles), and the size of antenna on most GPS-equipped devices, the received signal is very weak. Even though it is weaker than the noise floor, modern algorithms and some technological magic are able to interpret this whisper from the stars into usable data.

These jammers work because of the fragility of GPS signals – they are easily overpowered by a low-cost jammer. The jammer, however, isn’t trying to mimic a GPS satellite but instead, it simply broadcasts a loud and confusing signal which makes it virtually impossible to hear the real one.

When powered up, this makes it clear how the signal is completely destroyed by the patterns emitted by the device.

Compared to the legitimate signal which is transmitted from thousands of kilometers away, this device emits a stronger signal at arm’s reach. Without testing the range of this device, I can assume that it is capable of doing the deed from several meters away.

How GPS Jammers Overpower Weak Signals from the GPS satellites

After spending some time examining the device, it is clear that it is capable of accomplishing its advertised purpose. It is remarkable to see just how complex this relatively small device is. It is not easy for an individual to build something like this, yet this device is easily available and affordable. Therefore, it is interesting to take a closer look at how it works. By opening it up, we are able to see the intricate inner workings of the device.

We can see two major components on one side of the PCB, one is 78M05 regulator, which is to convert the vehicle’s 12 volts to 5 volts, the other one is the well-known NE555 timer. It is a pity that we have to take apart an jammer to gain this recognition of the most classic IC in the history of electronics.

Though it seems such a shame, it is a common phenomenon that jammer use them. First of all, 78M05 regulator is a voltage regulator which is commonly used to provide a constant voltage to the electronic circuits. The output voltage of this regulator can be adjusted by two external resistors. As for the NE555 Timer, it is a highly stable device which is used to generate accurate time delays or oscillations. It is a perfect device to generate the frequency required by the jammer.

In addition, NE555 timer can also be used in a wide range of other applications. For example, it can be used as a clock generator, pulse generator, timer, or oscillator. It provides excellent stability and accuracy in various applications. Moreover, its operation is very simple and doesn’t require many external components.

By using the 78M05 regulator and the NE555 timer, the jammer can operate normally and generate the required frequency. The sophisticated design and strong performance of these two components make them well suited for this purpose. It is really unfortunate that it takes a teardown of an illegal jammer for us to gain this recognition.

Still, unless you’re looking to jam an AM radio, a 555 isn’t going to cut it. Flipping the board over, we get our first glance at the real trouble maker.

Component 13BA A041 is certainly the star of the show. Unfortunately, I couldn’t find a datasheet for this particular model. We can, however, assume it is a microwave voltage-controlled oscillator (VCO).

The visible top plate is, in fact, a metallic shield. If given the right treatments, we can get a look at the interior where an amazing number of components are packed into just a 9 mm x 7 mm area.

It is a impressive feat of engineering, to say the least. The inner workings are a sight to behold. Each of the components serves a specific purpose and is carefully placed so as to achieve maximum efficiency.

The smaller components can be used to generate signals of varying frequencies while the larger components are responsible for controlling and amplifying the signal. It’s amazing to think that all this can be done despite the limited space available.

Overall, the microwave voltage-controlled oscillator is an incredible feat of engineering and a testament to the ingenuity of those who designed it. To be able to fit all of these components into such a tiny area is a testament to the potential of technology.

The function of the circuit board is to modulate the output of a Voltage Controlled Oscillator (VCO). The output of the VCO is connected to the control pin (labeled VC on the silkscreen), and the signal coming from the 555 timer on the other side of the board modulates the VCO’s output. This modulation causes an interference noise centered on 1,575 MHz, which is the frequency of the Global Position System (GPS).

By connecting the VCO’s control pin to the output of the 555 timer, the circuit board is able to control the frequency of the VCO. As the 555 timer’s output changes, the VCO’s output also changes, resulting in the interference noise centered on the GPS frequency. This noise is the result of the circuit board’s ability to modulate the output of the VCO.

By connecting the scope to the VC pin, we can observe a 133 KHz sawtooth signal being generated by the 555 timer. If we were to modify this signal, we would be able to change the frequency range of the jammer. However, since we do not have a datasheet for the VCO, it is hard to tell how far we can push the signal in either direction. Considering that the components used were likely the cheapest available, it is likely that we will not be able to push the signal very far.

We should take a close look at the small four pin device labeled Q6 located at the top of the board. This device is located directly in the path of the high frequency signal when it goes from the VCO to the center pin of the antenna connector. It could be an amplifier, or it might be used to protect the electronics from any signals picked up from the antenna.

To further investigate this, we can take a look at the characteristics of the device. We can examine its pins to see if it has any amplifying components. We can also look at the circuit board and measure the current passing through the device to see if it is a protective diode. These measurements will help us determine the purpose of this device.

We can also analyze the frequency response of the device. We can measure how the device responds to higher frequencies and lower frequencies. If the device is an amplifier, it should respond differently to different frequencies. This will help us determine if the device is an amplifier or a diode.

Finally, we can compare the device to similar devices used in other circuits. We can look at how these devices are used in other high frequency circuits and see if they are similar to the one found in our circuit. This will help us get a better understanding of the device’s purpose and how it is used in this specific circuit.

By taking a closer look at the device and analyzing its characteristics, we should be able to determine if it is an amplifier or a diode. With this knowledge, we can further investigate the circuit and make any necessary adjustments for better performance.

Mini GPS Jammer: A Surprising Danger

I was skeptical about the effectiveness of a Mini GPS Jammer when I first heard about it, but my expectations were vastly exceeded when I purchased one from For only forty US dollars, it was surprisingly easy to acquire the parts and assemble it. This raises the alarm for an easily accessible technology with the potential to cause harm in the wrong hands.

However, this is a great reminder of the importance of responsible technology usage and the need for more regulation. More efforts should be taken to ensure that dangerous technologies are not misused and that people are adequately informed about the proper use of these devices.

GPS Jammer – An Excellent Way to Prevent Tracking

GPS jammer is a great device for preventing tracking and invading your privacy. With a variety of jamming devices on the market, from car GPS jammer to GPS scrambler, GPS signal jammer to GPS bug jammer, you can choose the most suitable one to suit your needs.

Car GPS jammer is a great way to block GPS tracking signals and protect your car from being tracked. DIY GPS jammer is another option, which is also easy to make yourself. By using a GPS scrambler, you can easily prevent GPS tracking and ensure your privacy is protected.

Moreover, GPS jamming gadgets are also available on the market. With GPS tracker jammer, you can easily block GPS tracking devices and ensure your privacy. Besides, you can also choose a GPS jammer kit, which can be used to construct your own GPS jamming device.

In addition, if you are looking for a cheap and easy way to prevent tracking, consider a mini GPS jammer or a GPS jammer on ebay. With these devices, you can easily block GPS tracking signals and ensure your privacy.

Finally, if you are looking for a portable GPS jammer, look no further than a car jammer device. This jammer is able to block GPS tracking signals and ensure your privacy is kept safe.

In conclusion, GPS jammer is an excellent way to protect your privacy and prevent tracking. With so many options on the market, you can easily find the most suitable device to suit your needs and ensure your privacy is kept safe.


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