Latest news with #ESP32
Time Business News
2 days ago
- Time Business News
Best 47 Ohm Resistor 0.125W 0805 SMD in Charsadda Tangi
A 47 ohm SMD resistor is a surface-mounted passive electronic component designed to provide a specific level of resistance—47 ohms—between two points in a circuit. The 0805 package indicates its physical size: 0.08 inches by 0.05 inches (2.0mm x 1.2mm). These resistors are known for their compact design, making them ideal for dense circuit boards in smartphones, computers, and power electronics. Key specifications: Resistance : 47 ohms (Ω) : 47 ohms (Ω) Power Rating : 0.125W (1/8 Watt) : 0.125W (1/8 Watt) Package Size : 0805 (imperial), 2012 (metric) : 0805 (imperial), 2012 (metric) Tolerance: ±1% The 47 ohm SMD resistor is a versatile component widely used in modern electronics. Its stable resistance and small footprint allow it to support numerous applications: LEDs require current limiting to avoid burnout. A 47 smd ohm resistor can regulate the current flowing through the diode, ensuring optimal brightness and longevity. In regulated power supplies, the resistor helps in controlling inrush current, filtering signals, or creating voltage dividers for sensors and feedback loops. Microcontrollers such as Arduino and ESP32 benefit from pull-up/pull-down resistors like the 47-ohm SMD variant to stabilize logic levels and reduce noise. These resistors are embedded in devices such as TVs, smartphones, routers, and smart home appliances to maintain signal integrity and power control. Solar inverter circuits often require precise resistance values to protect transistors, control signals, and filter out unwanted electrical noise. Here's how the 47ohm SMD resistor comes in handy: Gate Resistors in MOSFET Drivers : In PWM inverters, this resistor helps in limiting current to the MOSFET gates, ensuring safe switching. : In PWM inverters, this resistor helps in limiting current to the MOSFET gates, ensuring safe switching. Snubber Circuits : Used to protect components from voltage spikes, the resistor, in combination with a capacitor, forms a crucial snubber network. : Used to protect components from voltage spikes, the resistor, in combination with a capacitor, forms a crucial snubber network. Current Sensing: Placed in series with power lines, a 47ohm resistor helps monitor the current flowing into different parts of the circuit. When repairing or building a solar inverter, make sure the resistor's power rating (0.125W) and tolerance (1%) match the required circuit design to avoid overheating or inaccurate readings. Check Packaging Codes : Ensure the resistor's markings match the required specifications. In SMD formats, '470' might be used to denote 47 ohms. : Ensure the resistor's markings match the required specifications. In SMD formats, '470' might be used to denote 47 ohms. Avoid Counterfeits : Buy from trusted sources to avoid low-grade components that can fail or have incorrect resistance. : Buy from trusted sources to avoid low-grade components that can fail or have incorrect resistance. Use with Compatible Tools: For soldering 0805 packages, use precision tweezers, magnifiers, and reflow-compatible paste if working on rework stations. Smaller Size, More Space : Ideal for portable electronics and IoT devices. : Ideal for portable electronics and IoT devices. Lower Inductance : Beneficial in high-frequency applications. : Beneficial in high-frequency applications. Automated Assembly: Easily placed by pick-and-place machines during manufacturing. These features make the 47ohm SMD resistor a preferred choice for both professionals and electronics enthusiasts. Finding high-quality 47Ohm SMD Resistor in Charsadda Tangi is relatively straight forward. Located in the heart of Peshawar, Suntech Mall offers a wide range of electronic components, including the 47 Ohm SMD Resistor. Their products are known for quality and reliability. You can visit their store or explore their website to check availability. SunTech Mall is a great platform to find 450V 68uF capacitors and other electronic components. While their inventory can vary, they frequently list high-voltage capacitors from reputable brands. The 47ohm resistor 0.125W 0805 2012 1% variant is a must-have component for precision electronics. In Charsadda Tangi, demand is growing as more people explore DIY electronics, solar systems, and embedded device repair. Whether you're working on a simple LED project or repairing an inverter, the 47 smd ohm resistor offers excellent reliability, compactness, and accuracy. Choose quality, source wisely, and enjoy building efficient and long-lasting circuits. TIME BUSINESS NEWS
Ammon
13-03-2025
- Ammon
Undocumented commands found in Bluetooth chip used by a billion devices
Ammon News - After receiving concerns about the use of the term 'backdoor' to refer to these undocumented commands, we have updated our title and story. Our original story can be found here. The ubiquitous ESP32 microchip made by Chinese manufacturer Espressif and used by over 1 billion units as of 2023 contains undocumented commands that could be leveraged for attacks. The undocumented commands allow spoofing of trusted devices, unauthorized data access, pivoting to other devices on the network, and potentially establishing long-term persistence. This was discovered by Spanish researchers Miguel Tarascó Acuña and Antonio Vázquez Blanco of Tarlogic Security, who presented their findings yesterday at RootedCON in Madrid. "Tarlogic Security has detected a backdoor in the ESP32, a microcontroller that enables WiFi and Bluetooth connection and is present in millions of mass-market IoT devices," reads a Tarlogic announcement shared with BleepingComputer. "Exploitation of this backdoor would allow hostile actors to conduct impersonation attacks and permanently infect sensitive devices such as mobile phones, computers, smart locks or medical equipment by bypassing code audit controls." The researchers warned that ESP32 is one of the world's most widely used chips for Wi-Fi + Bluetooth connectivity in IoT (Internet of Things) devices, so the risk is significant. Bleeping computer
Yahoo
11-03-2025
- Yahoo
Secret commands found in Bluetooth chip used in a billion devices
A potential security issue has been discovered by cybersecurity researchers that has the capability to affect more than one billion devices. According to researchers at the cybersecurity firm Tarlogic, a hidden command has been found coded into a bluetooth chip installed in devices around the world. This secret functionality can be weaponized by bad actors and, according to the researchers, used as an exploit into these devices. Using these commands, hackers could impersonate a trusted device and then connect to smartphones, computers, and other devices in order to access information stored on them. Bad actors can continue to utilize their connection to the device to essentially spy on users. The bluetooth chip is called ESP32 and is manufactured by the China-based company Espressif. According to researchers, the ESP32 is "a microcontroller that enables WiFi and Bluetooth connection." In 2023, Espressif reported that one billion units of its ESP32 chip had been sold globally. Millions of IoT devices like smart appliances utilize this particular ESP32 chip. SEE ALSO: New 'browser syncjacking' cyberattack lets hackers take over your computer via Chrome Tarlogic researchers say that this hidden command could be exploited, which would allow "hostile actors to conduct impersonation attacks and permanently infect sensitive devices such as mobile phones, computers, smart locks or medical equipment by bypassing code audit controls." Tarlogic says that these commands are not publicly documented by Espressif. Researchers with Tarlogic developed a new Bluetooth driver tool in order to aid in Bluetooth-related security research, which enabled the security firm to discover a total of 29 hidden functionalities that could be exploited to impersonate known devices and access confidential information stored on a device. According to Tarlogic, Espressif sells these bluetooth chips for roughly $2, which explains why so many devices utilize the component over higher costing options. As BleepingComputer reports, the issue is being tracked as CVE-2025-27840.
