Збирач потоків

submitted by /u/Traditional_Jury [link] [comments]

Infineon Technologies AG of Munich, Germany says that its new CoolSiC Automotive MOSFET 1200V has been selected by Germany-based international automotive supplier FORVIA HELLA for its next-generation 800V DC–DC charging solution...

Quantum Science Ltd of Daresbury, Warrington, UK — which is developing and commercializing INFIQ infrared quantum dot (QD) nanomaterials and technologies for infrared imaging and sensing markets — is expanding into a new manufacturing facility as it prepares for upcoming growth in the short-wave infrared (SWIR) imaging and sensing markets...

This design idea (DI) takes an unusual path to a power-handling DAC by merging an upside-down LM337 regulator with a simple (just one generic chip) PWM circuit to make a 20-V, 1-A current source. It’s suitable for magnet driving, battery charging, and other applications that might benefit from an agile and inexpensive computer-controlled current source. It profits from the accurate internal voltage reference, overload, and thermal protection features of that time proven and famous Bob Pease masterpiece! 

Wow the engineering world with your unique design: Design Ideas Submission Guide

Full throttle (PWM duty factor = 1) current output accuracy is entirely determined by R4’s precision and the ±2% (guaranteed, typically lots better) accuracy of the LM337 internal reference. It’s thus independent of the (sometimes dodgy) precision of logic supplies as basic PWM DACs often are not.

Figure 1 shows the circuit.

Figure 1 LM337 mates with a generic hex inverter to make an inexpensive 1-A PWM current source. (* = 1% metal film)
Iout = 1.07(DF – 0.07), Iout > 0

ACMOS inverters U1b through U1e accept a 10 kHz PWM signal to generate a -50 mV to +1.32 V “ADJ” control signal for the U2 current regulator proportional to the PWM duty factor (DF). Of course, other PWM frequencies and resolutions can be accommodated with the suitable scaling of C1 and C2. See the “K” factor arithmetic below.

DF = 0 drives ADJ > 1.25 V and causes U2 to output the 337’s minimum current (about 5 mA) as shown in Figure 1’s caption.

Iout = 1.07(DF – 0.07)

The 7% zero offset was put in to insure that DF = 0 will solidly shut off U2 despite any possible mismatch between its internal reference and the +5 V rail. It’s always struck me as strange that a negative regulator like the 337 sometimes needs a positive control signal, but in this case it does.

U1a generates an inverse of the PWM signal, providing active ripple cancellation as described in “Cancel PWM DAC ripple with analog subtraction.” Since ripple filter C1 and C2 capacitors are shown sized for 8 bits and a 10-kHz PWM frequency, for this scheme to work properly with different frequency and resolution, the capacitances will need to be multiplied by a factor K:

K = 2(N – 8) (10kHz/Fpwm)
N = bits of PWM resolution
Fpwm = PWM frequency

If more current capability is wanted, the LM337 is rated at 1.5 A. That can be had by simply substituting a heavier-duty power adapter and making R4 = 0.87 ohms. Getting even higher than that limit, however, would require paralleling multiple 337s, each with its own R4 to ensure equal load sharing.

Finally, a word about heat. U2 should be adequately heatsunk as dictated by heat dissipation equal to output current multiplied by the (24 V – Vout) differential.  Up to double-digit wattage is possible, so don’t skimp in the heatsink area. The 337s go into automatic thermal shutdown at junction temperatures above 150oC so U2 will never cook itself. But make sure it will pass the wet-forefinger-sizzle “spit test” anyway so it won’t shut off sometime when you least expect (or want) it to!

Stephen Woodward’s relationship with EDN’s DI column goes back quite a long way. Over 100 submissions have been accepted since his first contribution back in 1974.

 Related Content

• 0 V to -10 V, 1.5 A LM337 PWM power DAC
• Classic 3-leg adjustable regulators have a shunt mode? Who knew?
• Cancel PWM DAC ripple with analog subtraction
• Cancel PWM DAC ripple with analog subtraction—revisited
• Cancel PWM DAC ripple with analog subtraction but no inverter
• Fast-settling synchronous-PWM-DAC filter has almost no ripple

The post 1-A, 20-V, PWM-controlled current source appeared first on EDN.

Finally bought a house with space for a big workbench. Modeled this up in fusion 360 and built it this past weekend. A big step up from my old set up. submitted by /u/Mclevius-Donaldson [link] [comments]

The Internet of Things (IoT) has transformed industries by connecting billions of devices worldwide. From smart homes and industrial automation to healthcare and smart cities, IoT applications rely on robust wireless technologies for seamless communication. As IoT continues to expand, selecting the right wireless technology is crucial for optimizing performance, range, power consumption, and security. This article explores the latest and most effective IoT wireless technologies in 2025, helping businesses and developers make informed decisions.

1. Low Power Wide Area Networks (LPWANs)

LPWAN technologies are ideal for long-range, low-power IoT applications. These networks support devices that need to send small amounts of data over vast distances while consuming minimal power. Key LPWAN technologies include:

LoRa (Long Range)

LoRa operates in unlicensed spectrum bands and is widely used in smart cities, agriculture, and industrial applications. The latest advancements in LoRaWAN (LoRa Wide Area Network) include:

• Higher data rates through improved modulation schemes.
• Enhanced security with end-to-end encryption and authentication.
• Better network scalability supporting millions of connected devices.

NB-IoT (Narrowband IoT)

NB-IoT is a cellular-based LPWAN technology designed for applications requiring reliable, low-power, and cost-effective connectivity. Recent upgrades include:

• Improved indoor coverage, making it ideal for smart meters and asset tracking.
• Lower power consumption, enabling battery life of up to 10 years.
• Wider adoption in 5G networks for massive IoT deployments.

Sigfox

Sigfox is another LPWAN technology focused on low-cost, low-energy IoT communications. The latest enhancements include:

• Ultra-low power operation, extending device lifespan.
• Improved downlink capabilities, enabling bidirectional communication.
• Global network expansion, increasing its availability in new regions.

2. 5G for IoT

5G technology is revolutionizing IoT by offering high-speed, low-latency connectivity. It is particularly beneficial for applications requiring real-time data processing, such as autonomous vehicles, smart factories, and remote healthcare.

Key Benefits of 5G for IoT:

• Ultra-reliable low-latency communication (URLLC) for mission-critical applications.
• Massive Machine-Type Communications (mMTC) for large-scale IoT networks.
• Network slicing, allowing dedicated virtual networks for specific IoT applications.

As 5G infrastructure expands, its integration with AI and edge computing will further enhance IoT capabilities.

3. Wi-Fi 6 and Wi-Fi 7

Wi-Fi continues to be a dominant wireless technology for IoT in homes, businesses, and industrial environments. The introduction of Wi-Fi 6 (802.11ax) and Wi-Fi 7 (802.11be) brings significant improvements:

Wi-Fi 6 Features:

• Higher speeds and capacity, supporting multiple IoT devices simultaneously.
• Lower latency, improving performance in real-time applications.
• Better power efficiency, extending battery life for IoT sensors.

Wi-Fi 7 Advancements:

• Multi-link operation (MLO), enhancing reliability and reducing congestion.
• 320 MHz channel width, offering faster data rates.
• Optimized IoT connectivity, ensuring seamless device communication in dense environments.

4. Bluetooth Low Energy (BLE) and Bluetooth 5.3

Bluetooth remains a leading short-range IoT communication technology. The latest Bluetooth 5.3 update brings:

• Improved energy efficiency, extending battery life for wearables and sensors.
• Enhanced security features, protecting IoT devices from cyber threats.
• Better connection stability, reducing interference in crowded environments.

BLE is widely used in healthcare, smart home devices, and asset tracking due to its low power consumption and compatibility with smartphones.

5. Zigbee and Z-Wave Zigbee

Zigbee is a low-power mesh networking protocol commonly used in smart home and industrial IoT applications. Recent improvements include:

• Faster data transmission, increasing responsiveness in IoT ecosystems.
• Interoperability with Matter, a unified IoT standard for smart devices.
• Enhanced security, protecting connected devices from hacking.

Z-Wave

Z-Wave operates in the sub-1GHz frequency band, reducing interference with Wi-Fi networks. The latest advancements include:

• Longer range, improving connectivity for smart home automation.
• Stronger security protocols, preventing unauthorized access.
• Expanded device support, integrating with more IoT platforms.

6. Ultra-Wideband (UWB)

UWB is gaining traction for high-precision location tracking in IoT applications. Key advantages include:

• Centimeter-level accuracy, making it ideal for asset tracking and secure access control.
• High data transmission rates, improving real-time communication.
• Low power consumption, ensuring extended device life.

Choosing the Right Wireless Technology for IoT

Selecting the best IoT wireless technology depends on several factors:

• Range: LPWAN for long-range, Bluetooth/Zigbee for short-range.
• Power Consumption: LPWAN and BLE for energy efficiency.
• Data Rate: 5G and Wi-Fi 7 for high-speed applications.
• Security: Zigbee, Z-Wave, and Bluetooth 5.3 for enhanced protection.

Conclusion

As IoT adoption accelerates, the demand for reliable and efficient wireless connectivity continues to grow. From LPWAN and 5G to Wi-Fi 7 and UWB, the latest IoT wireless technologies offer tailored solutions for various applications. Businesses and developers must stay updated with these advancements to optimize their IoT deployments, ensuring seamless connectivity, enhanced security, and improved performance.

By leveraging the right wireless technology, organizations can unlock the full potential of IoT, driving innovation across industries and creating smarter, more connected ecosystems.

The post The Latest IoT Wireless Technologies: Enabling the Future of Connectivity appeared first on ELE Times.

Другий візит Надзвичайного і Повноважного Посла Японії в Україні Масаші Накаґоме kpi ср, 01/29/2025 - 13:36

A new host bus adapter (HBA) secures all data moving between servers and storage by facilitating quantum-resistant network encryption and real-time ransomware detection in data centers. Broadcom’s Emulex Secure Fibre Channel HBA encrypts all data across all applications while complying with the NIST 800-193 framework, which encompasses secure boot, digitally signed drivers, T10-DIF, and more.

Figure 1 Emulex Secure Fibre Channel HBA provides in-flight encryption with quantum-resistant algorithms. Source: Broadcom

Encryption of mission-critical data is no longer a nice-to-have feature; it’s now a must-have amid the continued rise of ransomware attacks in 2024, costing $5.37 million on average per attack, according to Ponemon Institute’s “Cost of a Data Breach” report. The advent of generative AI and quantum computers further magnifies this risk if data is not encrypted at all points in the data center, including the network.

It’s important to note that data centers have the option of deploying application encryption or network encryption to protect their data. However, network encryption enables real-time ransomware detection while application-based encryption hides ransomware attacks.

Network encryption also offers several important advantages compared to application-based encryption. One is that it preserves storage array services such as dedupe and compression, which are destroyed when using application-based encryption.

Not surprisingly, therefore, IT users are seeking ways to protect themselves against crippling and expensive ransomware attacks; they also want to comply with new government regulations mandating all data be encrypted. That includes the United States’ Commercial National Security Algorithm (CNSA) 2.0, the European Union’s Network and Information Security (NIS) 2, and the Digital Operational Resilience Act (DORA).

These mandates call for enterprises to modernize their IT infrastructures with post-quantum cryptographic algorithms and zero-trust architecture. Broadcom’s Emulex Secure HBA, which secures data between host servers and storage arrays, provides a solution that, once installed, encrypts all data across all applications.

Figure 2 HBA’s session-based encryption is explained with three fundamental tasks. Source: Broadcom

Emulex Secure HBA facilitates in-flight storage area network (SAN) data encryption while complementing existing security technologies. Next, it supports zero-trust platform with Security Protocol and Data Model (SPDM) cryptographic authentication of endpoints as well as silicon root-of-trust authentication.

It runs on existing Fibre Channel infrastructure, and Emulex 32G and 64G Secure HBAs are available in 1, 2, and 4 port configurations. These network encryption solutions offloaded to data center hardware are shipping now.

Related Content

• Securing the Internet of Things in a Quantum World
• New Rambus IP Product Advances Data Center Security
• Cisco, Radiflow Team on Intrusion Detection in Data Centers
• The Quantum Leap in Cybersecurity: A New Era of Challenges
• Why 2025 Will Be Pivotal in Our Defense Against Quantum Threat

The post Host bus adapter boasts quantum-resistant network encryption appeared first on EDN.