Otis Singleton
An electromagnetic pulse (EMP) is a burst of electromagnetic radiation that can damage or destroy electronic devices. While an EMP can affect mobile phones, it is not the only factor that determines whether a phone will be destroyed. The severity, location, and type of EMP, as well as the phone's proximity to power lines and base stations, also play a role in the potential damage caused by an EMP. To protect phones from an EMP, some sources suggest placing them in a microwave oven, which acts as a Faraday cage, shielding electronics from electromagnetic radiation. Additionally, phone batteries typically have built-in protections, such as thermal protection to prevent overheating during charging and prevent the battery from exploding.
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What You'll Learn
- A phone's battery has built-in protections, such as thermal protection
- Modern phones have more solid-state electronics, making them more vulnerable to EMPs
- A single EMP is unlikely to stop all phones from working
- Phones may be protected from EMPs by placing them in a microwave
- To protect against EMPs, phones should be turned off and housed in concrete buildings
A phone's battery has built-in protections, such as thermal protection
Thermal protection is a crucial aspect of battery safety. Lithium-ion batteries, commonly found in phones, have a preferred temperature range of 20 to 40 degrees Celsius for optimal and safe performance. To address this, some batteries have a temperature pin that detects if the temperature rise is within normal levels during charging. This feature prevents the battery from exploding due to excessive heat. Additionally, some batteries incorporate thermal regulators, also known as thermal "earmuffs," which passively maintain the battery within an optimum temperature range. These regulators use shape memory alloy wires that adjust their shape according to temperature, either dissipating excess heat or retaining warmth to stabilize the battery's temperature.
Another built-in protection in phone batteries is the low charge cut-out device, which prevents the battery from discharging too much. This feature ensures that the battery does not drain beyond a certain level, safeguarding against potential damage or performance issues associated with deep discharge.
While these protections are valuable, phone batteries may still benefit from additional safeguards. For instance, some batteries lack overcurrent protection, overvoltage protection, and abuse protection. To address this, external chargers with protection circuitry, such as the TP4056 board, can be used to protect against undervoltage issues.
It is important to note that battery protection is not limited to the battery itself. Some phones come with separate battery chargers that have quality circuitry to safely charge batteries. Additionally, smart charging limiters like Chargie can be used to prevent batteries from remaining at a full charge for extended periods, reducing voltage- and heat-related stress that can damage the battery's internal structure.
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Modern phones have more solid-state electronics, making them more vulnerable to EMPs
Modern phones have become an integral part of our daily lives. They have evolved to include more solid-state electronics, making them more vulnerable to EMPs (Electromagnetic Pulse). An EMP is a burst of electromagnetic radiation that can damage or destroy electronic devices. While small hand-held electronic devices may recover from an EMP attack, modern phones with solid-state electronics are likely to be significantly impacted.
Solid-state electronics are particularly vulnerable to EMPs because they function with electronic circuits, which can be disrupted or damaged by the electromagnetic pulse. The impact of an EMP on a modern phone can vary depending on its severity. While the phone itself may survive if it is unplugged during the EMP, the cellular network is likely to be affected, rendering the phone unusable for making calls or accessing certain features that rely on network connectivity.
Additionally, modern phones with inductive charging features may be at risk due to the energy present in the E2 and E1 waveforms, which are within the frequency range that the charging system operates. The charging system's vulnerability to EMP interference could potentially damage the phone's charging capabilities.
To protect modern phones from EMPs, some measures can be considered. One approach is to use a separate battery charger, allowing users to swap between charged and discharged batteries. This method is commonly practised in Korea and provides a layer of protection by physically separating the phone from the charging process. Another protective measure is to ground the phone's metal case, creating a Faraday cage. This acts as a shield, reflecting the incoming electromagnetic waves and reducing their impact on the device.
While modern phones with solid-state electronics are more vulnerable to EMPs, certain precautions can be taken to mitigate the risks. By understanding the potential impact of EMPs and implementing protective measures, users can enhance the resilience of their devices in the face of electromagnetic pulses.
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A single EMP is unlikely to stop all phones from working
The best way to stop an EMP from damaging electronics is to place them inside a Faraday cage, which acts as an EMP shield. Microwaves, for example, use a Faraday cage to prevent microwaves from escaping and cooking the user. However, this also prevents EMPs from damaging electronics inside the microwave.
To take out all mobile phones with EMPs, you would need multiple EMP explosions. The main way to do this is to take out the base stations, which are far more vulnerable as they have antennas and a lot of wiring that can pick up the electrical pulse. They are also connected to the rest of the telecommunications systems, which are likely to stop working with an EMP.
An EMP attack can cause specific electronics, machinery, and generator controls to stop working temporarily or permanently. The electrical grid would be directly affected, and it could take months to repair and get back to normal. Electronics will not be able to change from an "on" to "off" state, and data communicating with remote equipment might also be affected.
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Phones may be protected from EMPs by placing them in a microwave
An Electromagnetic Pulse (EMP) is a burst of electromagnetic radiation that can damage and destroy electronic devices. An EMP attack can cause specific electronics to stop working temporarily or permanently. Electronics will not be able to change from an “on” to “off” state, and data communicating with remote equipment might also be affected. An EMP can be caused by a nuclear detonation, powerful natural solar events, or EMP bombs.
To protect electronic devices from an EMP attack, one can store them in a Faraday Cage, which shields from electromagnetic fields. A microwave oven can act as a Faraday Cage as it has built-in shielding that uses non-ionizing radiation to make food absorb energy. The glass window of a microwave has small holes in a metal screen that keep the energy inside the walls of the microwave. This will also work in reverse, providing some protection to electronics placed inside when an EMP attack occurs.
However, it is important to note that a microwave is designed to block the frequency it operates at, which is generally 2.45 GHz. Therefore, it may not be effective at blocking much higher or lower frequencies. Additionally, if you can see through the holes in the microwave, then some frequencies can pass through them.
To test the effectiveness of a microwave as a Faraday Cage, place your electronics or small appliances inside the microwave when it is turned off and check if you receive a signal. Do not use the microwave with the devices inside.
Other methods to protect against an EMP attack include using a separate battery charger that comes with the phone or storing devices in a lead box or closed car, which are also supposed to act as Faraday Cages. Phones may also have built-in protection circuits, such as thermal protection to prevent the battery from exploding when charging.
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To protect against EMPs, phones should be turned off and housed in concrete buildings
While phones have built-in protection mechanisms, such as thermal protection and low charge cut-out devices, they are not designed to withstand the impact of electromagnetic pulses (EMPs). EMPs can be extremely harmful to electronic devices, including phones, and can cause significant disruptions to communication systems and critical infrastructure.
To effectively protect phones against EMPs, implementing a comprehensive approach is essential. Firstly, turning off phones can provide a basic level of protection. When phones are switched off, they are less susceptible to the damaging effects of EMPs as their electronic components are inactive. However, this measure alone may not offer complete protection.
Housing phones in concrete buildings, specifically those constructed or coated with EMP-shielding concrete, provides a more robust defence. This type of concrete, developed by engineers, incorporates materials such as carbon, metal components, and magnetite. Magnetite, a mineral with magnetic properties, is the key to its effectiveness, acting like a sponge to absorb microwaves and electromagnetic waves generated by EMPs. The combination of carbon and metal further enhances the concrete's ability to absorb and reflect these waves, significantly reducing the impact of EMP blasts.
The application of this EMP-shielding concrete can be done through a cost-effective spray-on method called shotcrete, making it feasible to retrofit existing buildings. This method ensures that the building interiors are protected from electromagnetic interference, safeguarding any phones or electronic devices within.
By combining the simple step of turning off phones with the robust protection offered by housing them in concrete buildings treated with EMP-shielding concrete, we can significantly enhance our defence against the destructive effects of EMPs on phones and other critical electronic systems.
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Frequently asked questions
Put your phone in a microwave and close the door. Microwaves have a Faraday cage that prevents microwaves from escaping and also protects electronics inside from EMPs.
EMP stands for Electromagnetic Pulse. It is a burst of electromagnetic radiation that can damage and destroy electronic devices.
An EMP can cause permanent damage to phones that are connected to power lines. However, small hand-held devices may recover from an EMP attack.
A single EMP is not enough to stop all mobile phones from working. To take out all mobile phones, you would need multiple EMP explosions.
To stop all mobile phones, you need to take out the base stations or cell towers as well. These are more vulnerable as they have antennas and wiring that can pick up the electrical pulse.
