Texas Instruments TMAG5328 Low-Power Hall-Effect Switch

Texas Instruments TMAG5328 Low-Power Hall-Effect Switch is a high precision, low-power, resistor adjustable Hall effect switch sensor with a low operating voltage. The TMAG5328 external resistor sets the operational BOP value. Users can follow a simple formula to calculate the resistor value needed to set up the correct BOP value. The Hysteresis value is fixed; therefore, the BRP value is defined as BOP Hysteresis.

The TI TMAG5328 Low-Power Hall-Effect Switch utilizes the adjustable threshold feature for easy and quick prototyping, fast design to market, reuse across different platforms, and easy last-minute modifications in case of unexpected changes. The device outputs a low voltage when the applied magnetic flux density exceeds the BOP threshold. The output stays low until the flux density decreases to less than BRP, and then the output drives a high voltage. By incorporating an internal oscillator, the device samples the magnetic field and updates the output at a rate of 20Hz for the lowest current consumption. The TMAG5328 supports an omnipolar magnetic response.

The TMAG5328 is housed in a standard SOT-23-6 package and operates from a VCC range of 1.65V to 5.5V.

Features

  • Supply range of 1.65V to 5.5V
  • Adjustable BOP from 2mT to 15mT
    • Using 2kΩ to 15kΩ resistors or 160mV to 1200mV voltage source
  • Omnipolar Hall switch
  • Push-Pull output
  • Low power consumption
    • 1.4µA at 3.3V 20Hz sampling rate
  • Industry-standard package and pinout
    • SOT-23 package
    • –40°C to 125°C operating temperature range

Typical Schematic

more information: https://www.ti.com/product/TMAG5328

Texas Instruments LMR51430 SIMPLE SWITCHER Buck Converters

Texas Instruments LMR51430 SIMPLE SWITCHER® Buck Converters are easy-to-use with the capability of driving up to 3A load current. Offering a wide input range of 4.5V to 36V, the LMR51430 is ideal for a comprehensive range of industrial applications for power conditioning from an unregulated source. The 500kHz and 1.1MHz switching frequency on the device support the use of relatively small inductors resulting in an optimized solution size.

The TI LMR51430 Buck Converters provide a PFM version to achieve high efficiency at a light load and an FPWM version to attain constant frequency and small output voltage ripple over the entire load range. The device requires minimum external components with soft-start and compensation circuits implemented internally. Additionally, the LMR51430 offers built-in protection features, including cycle-by-cycle current limit, hiccup mode, short-circuit protection, and thermal shutdown in case of excessive power dissipation.

The LMR51430 is housed in a 6-pin SOT-23 package.

Features

  • Functional safety-capable
    • Documentation available to aid functional safety system design
  • Configured for rugged industrial applications
    • 4.5V to 36V input voltage range
    • 3A continuous output current
    • 70ns minimum switching on time
    • 500kHz and 1.1MHz fixed switching frequency options
    • –40°C to 150°C junction temperature range
    • 98% maximum duty cycle
    • Start-up with pre-biased output
    • Internal short circuit protection with hiccup mode
    • ±1.5% tolerance voltage reference
    • Precision enable
  • Small solution size and ease of use
    • Integrated synchronous rectification
    • Internal compensation for ease of use
    • SOT-23 package
  • Pin-to-pin compatible with the TPS54202 and TPS54302
  • PFM and forced PWM (FPWM) options are available
  • Create a custom design using the LMR51430 with the WEBENCH® Power Designer

Application Circuit

Internal Diagram

more information: https://www.ti.com/product/LMR51430

SparkFun Launches Qwiic Micro With Four Sensor Boards

SparkFun has just launched a new family of four boards: the Qwiic Micro, which offers popular breakouts in a really small footprint.

“Qwiic Micro is our smallest I2C-supported board form-factor yet!” says the company. “At only 0.75in. by 0.30in. (or 24.65mm by 7.62mm for metric friends), Qwiic Micro is perfect for projects and applications that have space or weight concerns.”

The new Qwiic micro family is smaller than the normal Qwiic board by more than a third, one may want to think that the company probably wants to get rid of their Standard Qwiic Board size of 1 x 1 inch but they have insisted that they have no plans for such as the new Qwiic Micro board family is just a new board size offering.

The new board family is said to be perfect for portable and other size-or-weight projects since they are way smaller than their full-scale predecessors. Though the boards did not come with the second Qwiic connector and the unpopulated 2.54mm pin headers as is in their full-size equivalents, they were duly compensated for by the presence of unpopulated ground and interrupt pins.

Qwiic Micro launches with four sensor boards: the first is with the BMP581 absolute Pressure Sensor from Bosch Sensortec, the second with the BMP384 pressure sensor from Bosch Sensortec also, the third with STMicroelectronics’ ISM330DHCX Six Degrees of Freedom IMU while the fourth with a triple-axis MMC5983MA magnetometer by MEMSIC. These breakouts are extremely small, you can install them in projects with exceptionally tight spaces. The Qwiic Micro Sensors communicate over I2C, so you don’t need any soldering to connect them to the rest of your project.

The Micro-sized SparkFun Qwiic BMP581 Absolute Pressure Sensor board – The BMP581 claims an exceptional resolution and accuracy of 1/64Pa. It uses on-chip linearization and temperature compensation to provide true absolute data for pressure and temperature. It also has a wide pressure sensing range of 30 to125 kPa as well as output data rates up to 622Hz. The minimum current consumption in all operating modes is just 1.5µA (typical) while the peak current consumption by the sensor is 260µA.

The SparkFun Qwiic BMP384 Pressure Sensor board – The BMP384 is a low-cost sensor with a high resolution of up to 21-bit. It consumes approximately 2µA when it is idle and ~700µA at peak during measurements. The sensor is not water-proof but it is a great option for monitoring pressure in humid environments as it provides extra resistance to liquid. The sensor also gives a very good accuracy in wide pressure and temperature ranges (300hPa to 1250hPa, -40 to +85°C).

SparkFun Qwiic BMP581 Absolute Pressure Sensor Board

The SparkFun Qwiic Micro ISM330DHCX Six Degrees of Freedom IMU – STMicroelectronics’ ISM330DHCX is a high-performance 3D digital accelerometer and 3D digital gyroscope tailored for smart applications. It has a full-scale acceleration range of ±2/±4/±8/±16 g and supports multiple modes that allow for peripheral only, secondary I2C, and auxiliary three or four-wire serial interface. It also has a wide angular rate range of ±125/±250/±500/±1000/±2000/±4000 dps that enables its usage in a broad range of applications as well as an unmatched set of embedded features (Machine Learning Core, programmable FSM, FIFO, sensor hub, event decoding and interrupts).

The board is perfect for applications such as optical image, lens stabilization, robotics, and industrial automation, navigation systems, and vibration monitoring and compensation.

The SparkFun Qwiic Micro MMC5983MA Magnetometer – The highly sensitive MMC5983MA Magnetometer can sense down to 0.4 mG, with a heading accuracy of ±0.5°. It is said to be ideal for electronic compass applications; has output rates of 1000Hz, ±8G FSR, and 18-bit resolution.

All four boards are very much available and sell for affordable prices. The BMP581 goes for $20.95, the BMP384 for $16.95, the ISM330DHCX for $25.95, and the MMC5983MA for $15.95.

Edge Impulse announces support for Arduino Nicla Sense ME board with Bosch sensors

Edge Impulse has announced support for Arduino’s compact Nicla Sense ME board targeted at Edge AI Motion and Environment projects — a new standard for intelligent sensing solutions. The edge AI and tinyML expert promised to give full support for the device’s newly integrated sensors.

Less than a year ago, in September 2021, Arduino partnered with Bosch’s sensor division to launch the Nicla Sense ME, development board, with a stamp-like ultra-compact design. The high-performance, low-power board was designed to bring smart sensing solutions to the edge.

“Its small size and robust design make it suitable for projects that need to combine sensor fusion and AI capabilities on edge, thanks to a strong computational power and low-consumption combination that can even lead to stand-alone applications when battery operated,”

Edge Impulse’s Jenny Plunkett explains the compact development board.

 

Features and Specifications Include:

  • 64 MHz Arm® Cortex M4 (nRF52832) microcontroller
  • Bluetooth® 4.2 connectivity
  • 512KB Flash / 64KB RAM, 2MB SPI Flash for storage, 2MB QSPI dedicated for BHI260AP
  • 1x I2C bus (with ext. ESLOV connector), 1x serial port, 1x SPI, 2x ADC, programmable I/O voltage from 1.8-3.3V
  • Power: Micro USB (USB-B), Pin Header, 3.7V Li-po battery with Integrated battery charger
  • Dimensions: 22.86 mm x 22.86 mm
  • Weight: 2 grams

Usage and Applications:

  • Predictive maintenance
  • Robotics
  • Accelerated medical recovery
  • Logistics and supply chain
  • Gas detection
  • Detection of toxic substances
  • Home Automation
  • Monitoring of environmental conditions

Edge Impulse also extended support to four state-of-the-art sensors from Bosch Sensortec: 

  • BHI260AP motion sensor system with integrated AI
  • BMM150 magnetometer
  • BMP390 pressure sensor, and,
  • BME688 four-in-one gas and environment sensor with AI and integrated high-linearity.

With the range of Bosch Sensortec hardware and the powerful Nordic Semi nRF52832 system-on-chip, the Nicla Sense ME compact development board can be used to easily measure and analyze rotation, acceleration, temperature, pressure, humidity, air quality and CO2 levels.

Here are some of the benefits you get with using the Arduino Nicla Sense ME Development Board: 

  • It has tiny size, yet is packed with amazing features
  • It has a low power consumption rate
  • It adds sensing capabilities to existing projects
  • It becomes a complete standalone board when battery-powered
  • It has a very powerful processor, capable of hosting intelligence on the Edge
  • Robust hardware including high-quality Bosch sensors with embedded AI (accelerometer, gyroscope, geomagnetic, gas, pressure, temperature & humidity sensors)
  • Bluetooth LE connectivity maximizes compatibility with professional and consumer equipment
  • It can measure motion and environmental parameters easily (motion, gas, pressure, temperature, humidity, and more)
  • Always-on sensor data processing at extremely low power consumption
  • It is compatible with Arduino Portenta and MKR families
  • Battery or USB powered

Video

The company provided a quick guide on how to get started with the board; flashing the Nicla Sense ME with the Edge Impulse firmware for data collection and inference.

“Once you have collected enough data samples from your desired sensor, you can follow the building of a continuous motion recognition system tutorial to develop and deploy a machine learning model using one of the many Bosch sensors on the Nicla Sense ME,” says Plunkett.

These details and other useful information on the Nicla Sense ME development board can be found on the documentation site or on the Arduino Store where it sells for $82.80.

Easy Prototype Board for SOIC8/MSOP8/SOT23-3/4/5/6 Packages

This is an 8-pin SOIC/MSOP/SOT23-3/4/5/6 prototype board. This is a blank PCB that allows the operation of many chips from various manufacturers. Each device pin is connected to a pull-up resistor, a pull-down resistor, an in-line resistor, and a capacitor on VCC.  All pins are provided with a male header connector.

Note: Example schematic of temperature sensor LM35 provided.

Features

  • Supports 8-pin SOIC package
  • Supports 6-pin SOT23-3/4/5/6 (TSSOP) package
  • Supports 8-pin MSOP package
  • All Resistors and capacitor Size 0805
  • Each device pin has a footprint for an optional pull-up resistor, a pull-down resistor, In line resistor
  • 2 Pin Male Header connector and power supply filtering capacitors
  • PCB Dimensions 39.21 x 30.00mm
  • 4 x 2.5mm Mounting Holes

Schematic

Parts List

NO.QNTY.REF.DESC
11CN12 PIN MALE HEADER PITCH 2.54MM
22CN2,CN34 PIN MALE HEADER PITCH 2.54MM
31C1SMD CERAMIC CAPACITOR SIZE 0805
424R1-R24SMD RESISTORS OR CAPACITORS SIZE 0805
51U1MSOP8
61U2SOT23-3/4/5/6
71U3SOIC 8

Connections

 

Gerber View

Photos

Video

LM35 Datasheet

Deep Discharge Protector for 3.6V Li-Ion Battery

A rechargeable battery’s load should be disconnected at the point of complete discharge, to avoid a further (deep) discharge that can shorten its life or destroy it. Because a battery’s terminal voltage recovers when you disconnect the load, you can’t simply disconnect the load when the terminal voltage dips below the established threshold and then re-connect it when the voltage returns above that threshold. Such action may produce chatter in the disconnect switch. The project shown here is a complete solution to this problem.

The circuit disconnects the load when the battery level goes below a set point. The project is built using the MAX882 chip, which has a low-battery comparator and error amplifier that share the internal reference and the external resistor divider. With the resistor values shown, the low-battery output (LBO) goes low and disconnects both the battery and load when the output falls eighty percent below its nominal value. The battery and load then remain disconnected until RESET is clicked by SW1. Two factors enable the latching action in this circuit: the low-battery comparator remains active during shutdown (most regulators deactivate this comparator during shutdown), and the circuit monitors the regulated output voltage instead of the battery voltage (regulator voltage can’t recover until the regulator is turned back on). The circuit also provides an active-low POWER FAIL signal (LBO, pin 1) that goes low 50ms before the output is turned off. When LBO goes low, C1 discharges through R1 until the active low STBY input reaches its threshold (1.15V). The IC then enters its standby mode and disconnects the battery. IC1 is a linear regulator capable of sourcing 150mA with a 350mV dropout voltage. It has a 10µA standby current.

The disconnect voltage level is set to 3.08V. When the battery voltage drops to 3.08V, it disconnects the load, to reverse the condition, recharge the battery or replace and press the SW1.

Note: It is advisable to use low tolerance 0.1% resistors (R4, R5, R6, R7), for high accuracy,

Circuit Credits: Maxim Semiconductor

Connections and Other Details

  • CN1: Pin 1 +V 3.3V Output, Pin 2 GND
  • CN2: Pin 1 -Battery (GND), Pin 2 + Battery
  • SW1: Reset Switch

Features

  • Good for 3.6V Li-Ion Battery
  • Output 3.3V @ 150mA
  • Cut-off Voltage 3.08V
  • Load Up to 150mA
  • On Board Reset Switch
  • PCB Dimensions 23.18 x 17.46mm

Schematic

Parts List

NOQNTY.REF.DESCMANUFACTURERSUPPLIERPART NO
11CN12 PIN MALE HEADER PITCH 2.54MMWURTHDIGIKEY732-5315-ND
21CN22 PIN MALE HEADER PITCH 2.54MMWURTHDIGIKEY732-5315-ND
31C11uF/10V SMD SIZE 0805YAGEO/MURATADIGIKEY
42C2,C34.7uF/10V SMD SIZE 0805YAGEO/MURATADIGIKEY
51R1220K 5% SMD SIZE 0805YAGEO/MURATADIGIKEY
61R21K 1% SMD SIZE 0805YAGEO/MURATADIGIKEY
72R3,R41M 0.1% SMD SIZE 0805YAGEO/MURATADIGIKEY
81R549.9K 0.1% SMD SIZE 0805YAGEO/MURATADIGIKEY
91R6604K 0.1% YAGEO/MURATADIGIKEY
101R70E SMD SIZE 0805YAGEO/MURATADIGIKEY
111SW1TACTILE SWITCHNKK SWITCHDIGIKEYHP0215AFKP2-ND
121U1MAX882 SOIC8ANALOG DEVICEDIGIKEYMAX882CSA+-ND

Connections

Gerber View

Photos

 

Video

MAX882 Datasheet

Forlinx Introduces SBC powered by TI’s newest quad-core Sitara AM6254 processor

Forlinx Embedded, a leading manufacturer and supplier focused on designing and providing customers with trusted, ready-to-use, and easy-going ARM single board computers have introduced a new OK6254-C single board computer compatible with a FET6254-C SoM which is based on the quad-core Sitara AM6254 processor from Texas Instruments. The OK6254-C SBC boasts up to 8GB of eMMC, 2Kbit EEPROM, and up to three displays (one 16-bit RGB parallel interface and two dual-channel LVDS ports).

The FET6254-C SoM is a cost-effective and high-performance SoM based on AM62x series industrial grade SoCs. These SoCs, powered by 1.4GHz ARM Cortex-A53 cores, come with dual display support, a 3D graphics processing unit, one general-purpose memory controller, and high-speed interfaces.

The SoM is designed with ultra-thin connectors on its back for mating with the carrier board and has a combined height of only 2mm that allows for plug operations and maintenance. The SoM also has rich peripheral interface resources including dual GbE LAN ports, USB 2.0, RGB parallel, UART, CAN-FD, Camera, and Audio.

The SoM is widely applicable in projects like edge computing, retail automation, medical and laboratory equipment, appliance user interface and connectivity, industrial computer, industry 4.0, Human Machine Interfaces (HMI), 3D Re-configurable automotive instrument cluster, Telematics Control Unit (TCU), etc.

Key Features and Specifications of the FET625x-C SoM Include:

  • Processor: TI AM6254
    • CPU: 64-bit ARM Cortex-A53 quad-core processor (up to 1.4GHz)
    • MCU: Cortex-M4F (up to 400MHz)
    • GPU: AXE1-16M GPU that supports OpenGL ES 3.1 and OpenCL 3.0 and Vulkan 1.2
  • 1GB DDR4 (option for 2GB)
  • 8GB eMMC
  • -40 to +85℃ operating temperature range
  • 5V DC working voltage
  • Dimensions: 60 mm x 38 mm; 4 x 80-pin board-to-board connector
  • OS: Linux 5.10.87 + QT5.14.2
OK6254-C Carrier Board

OK6254-C Carrier Board Specifications Include:

  • 128 Mbit QSPI
  • 2 Kbit EEPROM
  • 1x microSD card slot (up to 104 MB/s)
  • 1x LVDS dual asynchronous channel (up to 1080×800 @60fps)
  • 1x 16-bit RGB parallel via FPC connector (up to 1024×600 @60fps)
  • 1x headphone output, 1x MIC input
  • 1x FPC connector
  • 2x GbE LAN ports
  • IEEE 802.11 a/b/g/n/ac dual-band Wi-Fi (via On-board AW-CM358M, up to 433.3Mbps)
  • Bluetooth 5.0 (up to 3Mbps)
  • 1x MicroSIM card slot (optional)
  • 3x USB 2.0 Host
  • 1x USB 2.0 OTG
  • 1x RS485
  • 2x CAN FD, 2x I2C, 1x SPI (via pin headers)
  • 16x ADC pins (via pin headers)
  • 1x 20-pin JTAG
  • 3x Debug UART
  • 1x Onboard RTC
  • Power: DC 5V/3A (Type-C)
  • Dimensions: 190 mm x 130mm

Other useful details on the SoM, SBC, and recommended accessories can also be found on the product page. The company however did not state how much they cost at the moment.

Snapdragon W5+ Gen 1 Wearable Platform with Qualcomm Hexagon DSP V66K AI engine

Snapdragon W5+ Gen 1 Wearable Platform

Snapdragon has launched a new hardware platform for next-gen wearable devices for extended battery life, enhanced user experience, and innovative design architecture– Snapdragon W5+ and W5. Adoption of these new hardware platforms comes with the announcement that Oppo and Mobvoi will release the first smartwatches with 25 designs in the pipeline across segments.

Snapdragon W5+ Gen 1 is designed with new enhancements to hybrid architecture offering 50% lower power, 2x better performance, 2x richer features, and 30% smaller size compared to the previous generator. The purpose-built platform is manufactured on a 4-nm-based system-on-chip and 22-nm-based integrated always-on co-processor. The hardware platform is capable of supporting low-power connectivity options– Wi-Fi, Bluetooth 5.3, and GNSS.

Inside the Snapdragon W5+ and W5 system architecture are the Qualcomm SW5100 and SW5100P powerful system-on-chip featuring a quad-core Arm Cortex-A53 processor, Qualcomm Adreno 702 GPU with dual ISPs supporting 16-megapixel cameras, 4G LTE multi-mode modem, and dual Qualcomm Hexagon DSPs. The always-on co-processor is an ultra-low-power Qualcomm QCC5100 system-on-chip featuring Arm Cortex-M55 processor core with U55 ML core, HiFi5 DSP, and integrated Bluetooth 5.3 connectivity.

“The new wearable platforms – Snapdragon W5+ and Snapdragon W5 – represent our most advanced leap yet,” said Pankaj Kedia, senior director, product marketing, and global head of Smart Wearables, Qualcomm Technologies, Inc. “Purpose-built for next generation wearables, these platforms address the most pressing consumer needs by delivering ultra-low power, breakthrough performance, and highly integrated packaging.”

Snapdragon W5+ Gen 1 wearable platform chips

Specifications of Snapdragon W5+ Gen 1 Platform:

  • SoC: Quad-core Arm Cortex-A53 at 1.7GHz optimized for wearables, fabricated using 4nm process technology and runs Wear OS by Google and AOSP
  • Co-processor: Arm Cortex-M55 at 250MHz, fabricated using 22nm process technology, and features a U55 machine learning core
  • GPU: Qualcomm Adreno 702 graphics unit at 1GHz
  • DSP: Dual Hexagon QDSP V66K
  • Memory:
  • Wireless connectivity: Bluetooth 5.3, Wi-Fi 802.11n, Co-ex for Bluetooth, Bluetooth LE, Wi-Fi, LTE, and NFC supported via third party
  • Display: MIPI-DSI for the SoC and QSPI with DDR for the QCC5100 co-processor supporting up to 1080 pixels at 60 frames per second, optimized for wearables
  • Camera: 2x 4-lane CSI Next-gen Spectra IS1×16 LPDDR4 2133MHzP with dual ISP supporting 16MP+16MP
  • Power management: New wearable PMIC optimized for low power and high integration systems
  • Operating system: Wear OS by Google and Android Open Source, FreeRTOS on AON co-processor

“We are thrilled to be working with a range of customers and partners, thus expanding our thriving wearable ecosystem, and are delighted to announce 25 designs in the pipeline across segments based on the new platforms. We have collaborated extensively with our first customers, Oppo and Mobvoi, over the last year and look forward to seeing their products,” said Kedia.

For more information, head to the official product page of the Snapdragon W5+ Gen 1 wearable platform.

PIX NII mini PC with powerful dual 4K HDMI video stream through Wi-Fi 6 connectivity

PIX NII mini PC

Pixcore, a Shenzhen-based embedded device manufacturer, has launched a crowdfunding campaign that aims to raise $6300 USD for its powerful mini personal computer, PIX NII, with advanced dual 4K HDMI video streaming using Wi-Fi 6 connectivity. Pixcore PIX NII mini-PC is powered by the Intel Pentium N6005 CPU with a small form factor, perfect for those looking for a next-generation mini-PC to easily switch between work and entertainment.

Pixcore PIX NII mini-PC looks very similar to the Apple Mac mini but weighs only 160 grams and delivers high performance leveraging the four Tremont CPU cores at a speed of up to 3.3GHz with 10-nm process technologies. The company claims the PIX NII mini-PC outperforms most of the other mini-PCs on the market due to its improved CPU performance.

The PIX NII mini-PC is marketed with a feature that supports two 4K HDMI video streams at 60Hz output for high-end gaming or office work. This enables the user to utilize two monitors simultaneously for more screen space for efficient workflow. Regarding wireless connectivity, the PIX NII mini-PC is designed to support Wi-Fi 6 connectivity to provide 3x faster Wi-Fi speeds, lower latency of around 10ms, and advanced traffic management to deliver a smooth Internet experience.

PIX NII mini PC application

There also comes Bluetooth 5.2, which is an essential connectivity protocol for any personal computer in the modern electronics ecosystem that allows the user to connect dozens of Bluetooth-compatible devices for easy and remote control of the mini-PC. The manufacturer has provided a list of devices that can be interfaced using various expansions, including HDMI, a USB 3.2 port, and a 3.5mm audio jack. These devices include a monitor, TV, projector, flash drive, keyboard, mouse, printer, speaker, mic, and headphones. For additional storage, the PIX NII mini-PC comes with a MicroSD slot for optional SD card storage.

To efficiently handle massive workloads, the PIX NII operates silently with a dedicated cooling solution to ensure optimal heat dissipation. The mini-personal computer delivers peak performance at all times without the noise of a fan through its highly efficient cooling system. For software support, the PIX NII works on multiple operating systems, including Windows, Ubuntu, and Linux, and gives the flexibility to the user to choose one for the best performance.

The crowdfunding campaign is actively looking for more supporters to help the manufacturer develop the NIX PII mini-PC. The pledge option starts at $249.00 for 16GB RAM and 1TB NVMe storage. Head to the official Indiegogo page and show your support.

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