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Dual USB Host/Hub Output with Constant Current Limit/Protection

This project has 2 outputs that enable us to power up 2 USB devices simultaneously from an input supply of 12-30V DC. The idea of this project is to have safe power for USB powered devices. The circuit is designed to simplify USB port power delivery based on self-powering 2 port USB HOST/HUB. IC provides two constant current outputs each of 1.1Amp 5V DC, and when any of USB port is overload/short circuit, the fault flag goes from high to low, and the outputs are in constant current mode.  The project can be used as a dual-port USB charger in cars or trucks.

The project comprises of two parts, a DC-DC converter, and constant current limit switches. LM2576 IC is used as a DC-DC converter that provides 5V 3Amps from an input supply 12V to 30V DC and FPF2303 chip used as dual-channel load switch, consist of dual, independent, current-limited, slew rate controlled P-channel MOSFET power switches. Slew rated turn-on prevents inrush current from glitching supply.

The board provides two jumpers J1 and J2 to enable the outputs. Switch control is accomplished by pulling down the pin ONA/ONB using jumpers. a current limit condition immediately pulls the fault signal pins FLAG-A or FLAG-B low and the part remains in the constant-current mode until the switch current falls below the current limit. The circuit offers current limiting, UVLO, and thermal shutdown protection for each USB port, in the event of an overcurrent condition, the load switch limits the load to the current limit value. The minimum current limit is set to 1.1A. The chip does not turn off the response to an overcurrent condition but remains operating in a constant current mode as long as ONA or ONB are enabled and thermal shutdown or UVLO is not activated.

The project can be controlled using Arduino by interfacing ONA/ONB pins for ON/OFF the output and Flag pins FLAG-A/FLAG-B to check the fault conditions.

Note: The circuit provides constant current outputs, the same board supports other chips details as per bellow

  • FPF2300MX Restart Mode
  • FPF2300MX Latch Off Mode
  • FPF23003MX Constant Current Mode

FPF2300, has an auto-restart feature that turns the outputs again after 504ms if the ON pin is still active

FPF2302, if the constant current condition persists after 10ms, these parts shut down the output and pull the fault signal Pin Flag low.

FPF2303 a current limit condition immediately pulls the fault signal pin Flag low and part remains in the constant current mode until the switch current falls below the current limit. I have tested this board with FPF2303 chip.

 CN1>> Power Input, CN2>> 5V Aux Output, CN3>> Flag-A, Flag-B, CN4>> USB-1 Output, CN5>> USB-2 Output

Features

  • Operating Voltage 12V-30V DC
  • Power LED at Input Supply
  • 2 USB Outputs Each 1.1A Max Load / 5V DC
  • 5V DC Aux Power Out
  • Flag-A and Flag-2 Outputs

Schematic

Parts List

Connections

Photos

Gerber View

Video

LM2576 Datasheet

FPF2303 Datasheet

Fisnar DC50 Digital Dispense Controller

Posted on by mixos

Fisnar DC50 Digital Dispense Controller is a general-purpose, easy to use digital dispenser with a bright 4-digit LED display.It’s user-friendly programming enables a dispense cycle to be quickly created and automatically displayed within minutes.

The DC50 has two modes of operation.

  • Manual Mode: The dispense operation is manually controlled by a foot pedal
  • Timed Mode: Dispenses at the pre-set time for controlled, repeatable shot sizes.

Additionally, the DC50 dispense controller is fully compatible with dispensing both low and high viscosity fluids thanks to its adjustable 0-100psi pressure regulator and vacuum suckback valve. It is a highly reliable and low-cost dispensing solution for both new and experienced users.

more information: www.ellsworthadhesives.co.uk

ON Semiconductor Released the RSL10 Mesh Platform

Posted on by mixos

On Semiconductor released a Bluetooth Low Energy mesh networking solution based on the company’s ultra-low-power RSL10 System-in-Package (RSL10 SIP). The solution has elements needed for the development and deployment of mesh networks.

It consists of two RSL10 Mesh Nodes and a Strata Gateway for connectivity to the Strata Developer Studio. Further, sensing and indicator devices were incorporated into the node hardware, including an ambient light sensor (LV0104CS), temperature sensor (N34TS108), magnetic sensors, LED indicators, and a triple-output NCP5623B LED driver (for color mixing purposes). A built-in battery charger for batteries with Li-Ion or Li-Poly chemistries is also featured.

The company noted that the mesh nodes can be configured to perform different roles and display different functional aspects. The Strata Gateway allows users to evaluate processes to be carried out using the intuitive Strata Developer Studio. Additionally, the cloud-connected software allows for provisioning of additional mesh and supports firmware-over-the-air (FOTA) updates.

For more information, visit http://www.onsemi.com

Use an ATtiny85 to Build Your Own Electronic Compass

Posted on by Emmanuel Odunlade

At the very heart of any embedded electronics system is a microcontroller. While the ATtiny series of microcontrollers have been around for a while now, they recently started getting noticed on a very high scale as DIYers and professional designers now use them in various projects which ordinarily would have featured a much bigger MCU or an Arduino. The ATtiny85 microchip is a small, affordable, and very versatile 8-bit AVR RISC-based microcontroller that features an 8KB programmable flash memory, 512 Bytes of SRAM, 512B EEPROM, 6 general-purpose I/O lines, 4 channel 10-bit A/D converter, internal and external interrupts and more.

Compared with the microcontrollers like the atmega328p, the Attiny85 has a smaller form factor, which makes them perfect for projects with small overall size requirements, like the electronics compass designed by Instructables user; Rahul7321, for the Instructables Maps challenge.

The tiny compass, which was built around the size of a typical analog pocket compass, comprises of an HMC5883L magnetometer, an OLED display, and the ATtiny85 microcontroller, all connected via the I2C to reduce wiring complexities. The HMC5883L magnetometer is used to sense the Earth’s magnetic field and the data obtained is processed by the Attiny85 and displayed on the tiny OLED in a manner similar to that of the analog compass.

Describing the project and the choice of the ATtiny85 microcontroller, Raul mentioned that the major challenge for the project was to maintain a small form factor, but using the ATtiny85 microcontroller which has just 8kb of programmable flash memory also meant they needed to reduce the size of the firmware. This was achieved by leveraging the I2C protocol in such a way that, it not only reduces the physical form factor but also helps keep a small code footprint.

A more detailed list of components used in the development of the project, asides from the ATtiny85 is provided below;

  • An HMC5883L Magnetometer
  •  3.7V 300mAh LiPo battery
  • A self-locking square button switch
  • 2 parts of a 3D printed case
  • A 0.96” SSD1306 128 x 64 I2C OLED display
  • 2x PCB of dimensions 17mm x 10 mm and 13mm x 18 mm), and
  • A micro USB 5V 1A Lithium battery charger.

One additional cool feature of this project which you might find handy for any other project you design is the charging mechanism, which is implemented in such a way that the user need only place the device on a platform to charge it.

The project is completely open-source and all information you might need to build your own, from schematics to firmware and a step-by-step build guide are all available on the project’s instructable page.

IBASE Unveils 1U Rackmount Network Computing Appliance with 25 GbE Ports

Posted on by mixos

New Enterprise Network Security Solution based on Intel Xeon Processor D-2100

IBASE Technology Inc. , a leader in the manufacture of network appliances and embedded systems, is pleased to announce its latest FWA8600 1U rackmount network computing appliance based on the Intel Xeon D-2100 processor product family and with up to 25 GbE ports. This highly scalable system is designed for managing data driven workloads and enabling robust levels of performance in enterprise network security, Unified Threat Management and WAN optimization applications.

The FWA8600 supports up to 128GB RDIMM with four DDR4-2666 DIMM sockets and one Intel I210-AT Ethernet controller. The device comes with network interface card (NIC) slots to accommodate up to three IBN cards with 8x GbE ports each and one IBN-P401Q card for a maximum of 25 GbE ports. For flexible I/O connectivity and expansion features, it offers a PCIe x8 slot, an M.2 expansion slot to interface with SATA 3.0 and PCIe x4 bus for high data throughput, as well as two USB 3.0, and an RJ45 serial console with LCM display for easy operation. LAN bypass is available in certain configuration.

FWA8600 FEATURES:

  • Intel Xeon D-2100 processor product family
  • 4x DDR4 RDIMMs; Max. 128 GB
  • 1x Intel I210-AT GbE
  • 4x NIC modules; Max. 24 GbE ports
  • Optional IPMI module
  • 1 x M.2 slot & optional PCI-E x8 expansion slot (4-lane)

“The FWA8600 features Intelligent Platform Management Interface (IPMI) 2.0 with the IBASE IDN100 module to allow users to remotely manage and monitor systems even without an operating system,” said Jason Ko, senior product manager at IBASE. “As an ideal platform for cloud computing and data centers, it also supports Trusted Platform Module (TPM 2.0) to provide hardware-based security data that encrypts data and protects authentication credentials from hackers.”

Furthermore, IBASE has verified the solution as an Intel Select Solution for uCPE that integrates the Ubuntu operating system and Intel Xeon D processor. These verified designs will benefit CSPs, telecom equipment manufacturers (TEMs), internet service vendors (ISVs), and enterprises in implementing uCPE and SD-WANs technologies with enhanced network performance and flexibility.

Learn More

ADLINK Launches SP-KL Series Smart Panel Based on 7th Gen Intel® Core™ U-Series Processors

Posted on by mixos

Reduced time to market and total cost of ownership with optimum flexibility, industrial-grade ruggedness, easy maintenance and long life support

ADLINK Technology, a global provider of leading edge computing solutions that inspire creative user experiences across industries, is pleased to introduce its new generation SP-KL Smart Panel series. Based on the success of the previous generation SP-AL panels that were adopted across a wide range of fields, the versatile all-in-one open frame SP-KL panel computer offers strong performance and flexible configuration with a high level of modularization. Coupled with ADLINK’s unique Function Module (FM) design, the SP-KL speeds up prototyping based on application requirements with reduced time, effort and cost. System integrators, integrated solution providers, and brand vendors can all achieve project success in transportation, retail, hospitality, industrial automation, healthcare, gaming and other applications.

To accelerate TTM, lower TCO, and enhance design flexibility, ADLINK’s Smart Panel exceeds common application demands with a modular design, enabling custom selection of touch panel type, display size, mainboard, I/O interface, and heat sink. To empower application-specific features, function enhancement and I/O expansion are fully supported through ADLINK’s FM board or I/O boards from partners and clients. “ADLINK’s Smart Panel provides a flexible embedded building block solution, enabling users to fast-track development, verification, and validation of smart devices while enjoying significant savings in time, money and resources. These are all key success factors for our customers,” explained Fabio Zhuang, Product Manager of ADLINK’s Embedded Platform and Modules Business Unit.

The newly released SP-KL fulfills the modular design requirements of our customers, offering a choice of 7-inch to 21.5-inch 16:9 displays, P-CAP or resistive touch panels, mainboards powered by Intel Core™ i3-7100U/i5-7300U/i7-7600U processors, support for Windows 10 and Linux operating systems, and wide-ranging built-in I/O interfaces. To accommodate I/O expansion needs, FM boards can be customized to cater to vertical applications and connect to an external power supply to support power-hungry peripherals such as graphics cards.

To maintain long-term reliable operation, all Smart Panel series feature robust construction, meeting or exceeding rigorous industry standards. The mainboard supports a wide operating range from -40˚C to +85˚C, rugged SODIMM, wide DC input voltage range, overvoltage protection (OVP) and undervoltage protection (UVP). For environments in which excessive moisture and contaminants are possible, all Smart Panel series provide IP65-rated resistance without the use of adhesives. In addition, the SP-KL’s modularity and advanced mechanical design allow for easy and fast maintenance. The SP-KL further provides long life support, with the proven stability of Intel® Core™ i3/i5/i7 U-series processors and industrial-grade display modules, alleviating concerns for long-term supply availability.

For more information about the SP-KL Smart Panel series, please visit:  https://www.adlinktech.com/Products/Panel_PCs_Monitors/SmartPanel/SP-KL_Series 

High-Performance Multimedia Single Board Computer with NXP i.MX 8M CPU

Posted on by mixos

The Multimedia CPU i.MX 8M from NXP (4x ARM® Cortex®-A53 (64 Bit) with 1.5GHz & Cortex®-M4 CPU) is perfect for applications with demanding graphics in building automation, all kinds of HMI in industry and medical technology, as well as POS and POI terminals. With Linux on the Cortex®-A53 cores and FreeRTOS on the Cortex®-M4 core, NXP continues its heterogeneous concept and offers an ideal possibility for real-time processing.

For graphics processing the CPU offers OpenGL/ES 3.1, OpenGL 3.0, Vulkan, OpenCL 1.2 as well as the playback of videos up to 4Kp60. F&S Elektronik Systeme (manufacturer of embedded boards for more than 20 years with headquarters in Stuttgart) has placed this powerful CPU on the new Single Board Computer armStone™MX8M (PicoITX format). Up to 8GB LPDDR4 RAM, 1GB SLC NAND Flash and additionally up to 64GB eMMC, as well as USB3.0, Audio IN/OUT/MIC, Gigabit Ethernet, mPCIe (SIM Slot), MIPI CSI, 3x I2C, SPI, 4x UART, CAN and SDIO (uSD Slot) are available. 2x LVDS (up to FullHD) and DVI up to 4k are available for display interface. A resistive or PCAP touch panel is connected via I2C. Another option is an OnBoard WLAN/BT module (pre-certified) with antenna socket.

As with all armStone™ single board computers, many of the signals are on common connectors or on the 66-pin feature bus. The armStone™MX8M is powered by 5V (a pluggable 12/24V adapter is offered as an accessory), the power consumption is only a few watts. With a temperature range of up to -20°C – +70°C, the armStone™MX8M can also be used outdoors. Linux (Buildroot, Yocto follows) is available as operating system. This has already been ported by the experienced software team of F&S Elektronik Systeme. Bootloader, device tree, customized interface drivers and all tools necessary for development are available. Various security functions are made available by the Linux adaptation of F&S Elektronik Systeme.

With the F&S project guarantee F&S Elektronik Systeme accompanies the customer from the project start to the successful completion of the project. Starterkit and workshop, documents for hardware and software development and free support by the experienced engineers of F&S Elektronik Systeme GmbH are available.

  • The armStone™MX8M will remain available until at least 2028.
  • The armStone™MX8M can be purchased directly from F&S Elektronik Systeme or from one of its worldwide distribution partners.

VIPER222 – high voltage MOSFET with a PWM control

Posted on by mixos

The VIPER222 device is a high performance high voltage converter that combines a 730 V rugged power MOSFET with a PWM control. The device embeds the high voltage startup and the current sense circuit, avoiding the use of extra components in the BoM. Frequency jittering spreads the EMI and allows the use of a small filter. The burst mode technique allows to obtain a very low input power consumption at light load.

Key features

  • 730 V avalanche rugged power MOSFET
  • PWM controller
  • 1.2 V reference voltage
  • Frequency jittering
  • 40 mW no load input power at 230 VAC
  • Short-circuit protection
  • Thermal shutdown

more information: www.st.com

ISP2200 Inductive Sensor – A game changer for industrial motor commutation

Posted on by mixos

High-accuracy motor commutation sensing, magnet free, total stray field immune for efficient and lightweight motor integration

The new magnet-free IPS2200 inductive position sensor is featuring high accuracy and speed, total stray field immunity, and efficient motor integration in a thin and lightweight form factor. The IPS2200 is ideal for use as an absolute position sensor in a wide range of industrial, medical, and robot applications. The sensor allows customers to cost-effectively tailor sensor design for their applications and maximize the performance of the sensor’s accuracy.

Key features

  • Industrial qualified, with stable operation in harsh environments and -40° to +125° C ambient temperatures
  • Interface: Sin/cos single-ended or differential
  • Voltage Supply: 3.3V ±10% or 5.0V ±10%
  • Rotational Speed: Up to 250.000 rpm (electrical)
  • Propagation delay: Programmable, <10µs
  • Sin/cos gain mismatch and offset compensation
  • Overvoltage, reverse polarity, short-circuit protected
  • Digital programming interface: I²C or SPI
  • 16-TSSOP package

Compared to tradition resolvers the IPS2200 is up to 10x thinner and up to 100x lighter.

Off-the-shelf tools that can be used to create tailored and customized sensing elements. The custom tools can achieve coil optimization sets within 30 minutes.

more information: www.idt.com

01005 inch Size Multilayer Ceramic Capacitor with a Capacitance Value of 1.0μF

Posted on by mixos

Murata Manufacturing has developed the world’s first multilayer ceramic capacitor with a capacitance value of 1.0μF in the 01005-inch size (0.4×0.2mm), which is increasingly used in a wide range of mobile electronic devices including smartphones. Mass production of the GRM022R60G105M with a rated voltage of 4Vdc has already started and mass production of GRM022R60J105M with a rated voltage of 6.3Vdc is scheduled to begin in 2021.

The spread of 5G smartphones and the increasing functionality and miniaturization of wearable devices is stoking the demand for further miniaturization and higher density of electronic circuitry. Among the applications, multilayer ceramic capacitors are essential components of many kinds of electronic devices and are widely used in such devices as smartphones and wearable devices. Given that approximately 900 to 1,100 multilayer ceramic capacitors are installed in a single high-end smartphone, a considerable need exists for capacitors combining smaller size with larger capacity. In particular, since multilayer ceramic capacitors with a capacitance of 1.0 μF are widely used in various devices, expanding the adoption of these new products will contribute to the further miniaturization of electronic devices.

These products have achieved approximately a 35% reduction in footprint and a 50% reduction in volume ratio compared to our existing product with the same capacitance value (015008-inch size). In addition, their capacity has increased by about 2.1 times compared to our conventional product of the same size (01005-inch size).

Click here for details: 01005 inch size multilayer ceramic capacitor GRM022R60G105M

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