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What is Reverse Wireless Charging on Smartphones?

Reverse Wireless Charging

Reverse wireless charging is an innovative feature that has gained popularity in the smartphone industry over recent years. This technology allows a smartphone to act as a wireless charging pad for other devices, enabling the transfer of power from the phone to another device that supports wireless charging. Before delving into how it works and its practical applications, let’s explore the technology behind wireless charging itself.

Wireless charging, at its core, relies on the principle of electromagnetic induction. This involves the transfer of energy between two objects through an electromagnetic field. A typical wireless charging setup includes a transmitter (the charging pad) that generates an electromagnetic field and a receiver (in the device being charged) that captures energy from that field to charge the battery.

Reverse wireless charging turns the smartphone into the transmitter, allowing its built-in battery to share power with other devices. This feature leverages the smartphone’s ability to generate an electromagnetic field that can be utilized by compatible devices to draw power. It effectively turns the phone into a portable charging station, eliminating the need for carrying multiple chargers or seeking power outlets for small gadgets.

Understanding the Basics

  • The Science Behind It: Reverse wireless charging works on the principle of electromagnetic induction.

Your phone houses a coil that can function in two ways. First, it acts as a receiver, drawing power from a traditional wireless charger. Second, it can reverse its role, becoming a transmitter and sending out an electromagnetic field.

  • This field can be picked up by other Qi-compatible devices (the prevailing wireless charging standard), replenishing their batteries.
  • What It Does: The most convenient use case is topping up smaller accessories like wireless earbuds or smartwatches. If you’ve forgotten their charging cases, your phone can act as an emergency power source.

It’s worth noting that reverse wireless charging isn’t designed to charge other phones to full capacity; it’s more of a “get you out of trouble” solution.

Pros and Cons

Benefits

  • Convenience: The biggest advantage is the freedom from carrying multiple cables and chargers.
  • Your phone becomes a portable power hub.
  • Emergencies: It can be a lifesaver if your earbuds die during a commute or your friend’s phone battery is flat.
  • Innovation: It shows the increasing sophistication of smartphone technology.

Drawbacks

  • Battery Drain: Reverse wireless charging uses up your phone’s own battery, potentially shortening its runtime.
  • Slow Speeds: Don’t expect lightning-fast charging; it’s much slower than traditional wired or wireless charging methods.
  • Limited Compatibility: Not all devices support Qi wireless charging, restricting the range of things you can power up.

Which Phones Have It?

Reverse wireless charging is usually a feature reserved for premium, flagship smartphones.

Some notable examples include:

  • Samsung Galaxy Series: Latest Models
  • Google Pixel Series: Latest Models
  • Huawei Mate Series: Mate 20 Pro and laterOnePlus Series: OnePlus 8 Pro and later

How to Use It

  • Check Compatibility: Ensure both your phone and the device you want to charge support Qi wireless charging.
  • Enable the Feature: Usually found in your phone’s battery settings (may be called “Wireless PowerShare” or similar).
  • Position the Devices: Place the device you want to charge back-to-back with your phone. The exact placement of the charging coils varies between phones, so you might need to adjust slightly for optimal connection.
  • Wait and Monitor: Charging will begin automatically.
  • Keep an eye on your phone’s battery level.

Final Thoughts

Reverse wireless charging reflects the evolving landscape of mobile technology, emphasizing convenience and the seamless integration of devices in our daily lives. While it’s not intended to replace traditional charging methods, it offers a flexible, innovative solution for power sharing and charging on the go. As technology advances, we can expect improvements in efficiency and broader adoption across more devices, making it an increasingly indispensable feature in the ecosystem of mobile gadgets.

Image Credit: Evgeny Opanasenko

Filed Under: Android News, Guides, Mobile Phone News





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How to Reverse Engineer GPTs on ChatGPT

Reverse Engineer GPTs

This guide is designed to show you how to reverse engineer GPTS with ChatGPT. Have you ever wondered about the intricate workings of Generative Pre-trained Transformers (GPTs) and how they can be manipulated or reverse-engineered? If so, you’re part of a growing community fascinated by these developments. In a recent, in-depth video, experts took a deep dive into this cutting-edge topic, uncovering a range of techniques that lay bare the hidden instructions embedded in GPTs.

This exploration goes beyond mere curiosity; it ventures into revealing how one might coax these advanced systems into executing actions they weren’t originally intended to perform. The revelations from this video not only shed light on the underlying processes of these AI giants but also open up discussions about the potential and limitations inherent in such powerful technology.

Discovering the Inner Workings of GPTs

The video kicks off with a captivating demonstration of how one can extract the exact prompts and instructions used in custom GPT models. It’s a process akin to peeling back the layers of an onion, revealing the core of these complex systems. This exploration is not just academic; it provides invaluable insights into the capabilities and potential vulnerabilities of large language models (LLMs).

Techniques to Extract GPT Instructions

  1. Extracting GPT Instructions: Here, you’ll learn to use specific prompts to coax GPTs into revealing their instructions word-for-word. It’s a bit like asking the right question to get the most direct answer. The technique takes advantage of the way files are stored in GPT’s backend, turning the AI into a veritable open book.
  2. Prompt Injection Techniques: The video then takes a deep dive into various prompt injection methods. These are ingenious ways to test, and sometimes exploit, the boundaries of LLMs. They include:
    • Direct Prompt Injection: Directly manipulating the prompt sent to the AI to achieve a specific outcome.
    • Indirect Prompt Injection: Involving third parties to alter the LLM’s behavior and generate unexpected responses.
    • Context Length Attacks: Filling the LLM’s context with irrelevant data to make it forget earlier instructions.
    • Multi-Language Attacks: Exploiting the LLM’s uneven training across different languages.
    • Role Playing Attacks: Tricking the LLM into role-playing scenarios to bypass restrictions.
    • Token Smuggling: Altering the LLM’s output in ways that pass automated checks but can be reassembled by humans.
    • Code Injection: Effective in GPTs that have code interpreters enabled.
    • Prompt Extraction: Extracting instructions or other data from GPTs.

Security Measures Against Exploits

Given these potential vulnerabilities, the video emphasizes the importance of security and protection measures. It’s not just about building stronger walls; it’s about understanding the various ways these walls can be scaled or bypassed. The presenter discusses adding guards to instructions and utilizing specialized software like Lera, which identifies prompt leakage and protects against personal identifiable information (PII) exposure.

Interactive Challenges for the Curious Minds

If this all sounds a bit abstract, don’t worry. The presenter points to an interactive website with challenges (Gandalf page) where users can apply these prompt injection techniques to uncover a secret phrase. It’s not just a practical demonstration of the concepts; it’s a testament to the complexity and sophistication of these attacks.

Embracing the Complexity

As we navigate through the labyrinthine world of GPTs, it’s clear that the journey is as important as the destination. Understanding these techniques opens up new vistas in our comprehension of AI and its myriad possibilities. Whether you’re a tech enthusiast or a seasoned professional, this insight into the world of GPTs is sure to be an enlightening experience.

Remember, knowledge is power, especially when it comes to the rapidly evolving world of technology. By understanding the inner workings of GPTs, you are not only staying informed but also contributing to a more secure and ethical AI future. We hope that you find this video and guide on how to reverse engineer GPTS useful, if you have any comments or questions, please leave a comment below and let us know.

Source: Show Me The Data

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Raspberry Pi 5 PCIe connection unlocked via reverse engineering

Raspberry Pi 5 PCIe connection unlocked via reverse engineering

Reverse engineering is a methodical process that involves deconstructing complex systems into simpler parts to gain a comprehensive understanding of how they work. YouTuber “George Smart, M1GEO” has released an interesting video this week providing more details on his process of reverse engineering the Raspberry Pi 5 PCIe connection. The Raspberry Pi 5 compact, single-board computer was recently launched and is now available to purchase offering more power compared to its predecessor in a similar form factor.

The Raspberry Pi 5 is equipped with a PCIe connector, a vital component that enables the connection of peripherals to a computer’s motherboard. This connector is a 16-pin FPC connector, carefully designed to connect electronic devices with flexible flat cables. By expertly adjusting the kernel options, which are configurable settings for the operating system’s core, the PCIe support for the connector can be activated, thereby enhancing the device’s functionality.

Reverse engineering the Raspberry Pi 5 PCIe connection

Other articles we have written that you may find of interest on the subject of Raspberry Pi 5 and mini PC systems :

What is a PCIe connector?

PCIe, or Peripheral Component Interconnect Express, is a high-speed interface standard used for connecting peripheral devices to a computer’s motherboard. The PCIe connector is a part of this standard, facilitating the physical connection between the motherboard and various devices such as graphics cards, network cards, storage devices, and more.

The PCIe connector varies in size and configuration, depending on the number of lanes it supports. The lanes are the data paths in the PCIe interface; more lanes allow for greater data transfer rates. Common configurations include x1, x4, x8, and x16, where the number refers to the count of lanes. For example, a PCIe x16 connector is wider and supports higher data throughput than a PCIe x1 connector.

Physically, PCIe connectors are differentiated by their size and pin arrangement. A x16 connector is longer, to accommodate more pins, whereas a x1 connector is much shorter. Devices will fit into a slot that is the same size or larger than their connector. For instance, a PCIe x1 card can fit into a PCIe x16 slot, but not vice versa.

In practical use, PCIe connectors have enabled substantial advancements in computer performance, particularly for tasks that require high bandwidth, like gaming, video editing, and data-intensive scientific computations. The flexible nature of PCIe, supporting different sizes and configurations, has contributed significantly to its widespread adoption in modern computing systems.

Pi 5 PCIe port

Besides the PCIe connector, the Raspberry Pi 5 also features a reset signal. This is a signal used to reset a device to its initial state, essentially a reboot. This signal pulses up and then comes back down every time the device reboots, ensuring the device’s functionality remains optimal. This is a crucial aspect of the device’s functionality and is a key area of interest in the reverse engineering process.

The Raspberry Pi 5 also includes a transmit pair, clock pair, and receive pair. These are pairs of signals used in high-speed digital systems for transmitting, timing, and receiving data, respectively. The transmit pair is strategically located next to the Broadcom chip, a type of PCIe chip manufactured by Broadcom, which is part of the PCI standard. The clock pair and receive pair do not have capacitors around them on the board, which is a unique feature of the Raspberry Pi 5 that sets it apart from other devices.

Another key feature of the Raspberry Pi 5 is its connection to a 5V rail, a device that provides electrical energy. This connection is crucial for the device’s power supply, ensuring it has the necessary energy to function optimally. This is another key area of interest in the reverse engineering process, as understanding the power supply can provide valuable insights into the device’s performance.

To further understand the functionality of the Raspberry Pi 5, a breakout board was connected to the PCI Express, a high-speed serial computer expansion bus standard. By connecting six pins and ground, the PCIe works at gen one. This setup was tested with a PCIe card and a USB FireWire card, devices that provide USB and Firewire connectivity. Both of these devices were recognized by the system, indicating a successful connection and further validating the functionality of the Raspberry Pi 5.

The process of reverse engineering the Raspberry Pi 5 has provided valuable insights into its functionality. By understanding the device’s PCIe connector, reset signal, transmit pair, clock pair, and receive pair, as well as its connection to a 5V rail and the creation of a breakout board, a deeper understanding of the device’s inner workings has been achieved. This knowledge can be used to further advance the projects and applications that the Pi 5 can be used for and improve its performance and capabilities.

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Rimac Nevera is the world’s fastest car in reverse

Rimac Nevera

Rimac already holds a number of world records for their Rimac Nevera supercar and now they have set another one. The Rimac Nevera is now the world’s fastest car in reverse and the video below shows the record being set.

The car managed an impressive top speed of 171.34 miles per hour or 2754.74 km/h in reverse, this is the same speed that was set by the Lamborghini Miura in 1969, although that car was going forward and not backward.

Witnessed by Guinness World Records and verified using data measured by Dewesoft, the Nevera now officially holds the GUINNESS WORLD RECORDS title for the fastest speed in reverse. Hosted at the Automotive Testing Papenburg facility in Germany, the Nevera returned to the place where – earlier this year – it had broken more than 20 acceleration and braking records in a single day, as well as the site of its record-breaking top speed run to 256mph (412km/h). Finished in the Time Attack Edition livery worn during earlier record-breaking runs – available to just 12 customers globally – the Nevera was driven to a top speed of 171.34mph (275.74km/h).

Unlike an internal combustion engine car, or even some electric cars, the drivetrain of the Nevera has no gears – the four individual motors either go backwards or forwards but it’s always one relentless wall of acceleration right the way from standstill. That means that the same powertrain capable of delivering 0-100mph in 3.21 seconds or 0-200mph in just under 11 seconds forwards could also deliver similar earth-shattering performance travelling backwards.

You can find out more details about the Rimac Nevera and its new world record, plus many of its previous world records over at the company’s website at the link below.

Source Rimac

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