Android APP Contact Us
login / register Upload
TRENDING:

POV (Persistence of Vision) – Open-Source Arduino Nano Hardware

Posted on by mixos

This is an easy and simple hardware to create a POV display. The hardware consists of a Hall sensor, Arduino Nano, 17 x 5mm LEDS of various colors, etc. The Hall Sensor is connected to analog pin A5 with a pull-up resistor. The circuit works with 3.7V to 5V DC and a 3.7V battery is ideal to use. The user may use as many LEDS as required. This project can also be used to create many applications such as Bar-Graph display, LED light effects. A large 8.5 mm hole is provided to mount the motor coupling. Refer to the diagram for mounting the hall sensor, motor, and magnet.

POV (Persistence of Vision) – Open-Source Arduino Nano Hardware – [Link]

Balanced Line Receiver for Digital Signal Over Twisted Pair CAT-5 Cable

Posted on by mixos

The circuit presented here is a high-frequency differential line receiver amplifier that has excellent common-mode rejection at its inputs. The project is an ideal solution for a receiver of a digital signal or video signals that are transmitted over long distances on twisted-pair cables like CAT5. Category 5 cables are very common in office settings and are extensively used for data transmission. These cables can also be used for the digital signal or analog transmission of signals such as video. These long cables pick up noise from the environment they pass through. This noise does not favor one conductor over another and therefore is a common-mode signal. A receiver that rejects the common-mode signal on the cable can greatly enhance the signal-to-noise ratio performance of the link. This project is tested with 100Hz to 1Mhz square wave signal, however, it can support higher frequency.

Balanced Line Receiver for Digital Signal Over Twisted Pair CAT-5 Cable – [Link]

Phase-Shifted Full-Bridge PWM Controller Module – LM5046 Breakout Board

Posted on by mixos

This is a Phase-Shifted Full-Bridge PWM LM5046 carrier board that contains all of the features necessary to implement a phase-shifted full-bridge topology power converter. All inputs and outputs pins are accessible using the header connector. High efficiency DC-DC converter can be created using LM5046 carrier board + External H-Bridge and Transformer. Refer to the datasheet of LM5046 and schematic to configure the frequency, current feedback, delays, etc.

Phase-Shifted Full-Bridge PWM Controller Module – LM5046 Breakout Board – [Link]

Closed Loop Analog Position Control using Brushed DC Motor and Potentiometer

Posted on by mixos

The project presented here is a low-cost position control closed-loop analog-servo using brushed DC motor and potentiometer as feedback. This project provides all necessary active functions for a closed-loop servo system using a Brushed DC Motor and potentiometer mounted on the output shaft of the DC Motor with Gear. The project is ideally suited for almost any servo positioning application. Can be used in applications such as side mirror movement control for cars, car head lamp beam control, animatronics, robotics, etc.

Closed Loop Analog Position Control using Brushed DC Motor and Potentiometer – [Link]

BQ27220 – Single cell pack/system-side CEDV battery fuel (gas) gauge w/pre-programmed chemistry profiles

Posted on by mixos

The Texas Instruments bq27220 battery fuel gauge is a single-cell gauge that requires minimal user configuration and system microcontroller firmware development, leading to quick system bring-up. The bq27220 device uses the Compensated End-of-Discharge Voltage (CEDV) algorithm for fuel gauging and provides information such as remaining battery capacity (mAh), state-of-charge (%), runtime-to-empty (min), battery voltage (mV), temperature (°C), and state-of-health (%).

The bq27220 battery fuel gauge has ultra-low power consumption in NORMAL (50 μA) and SLEEP (9 μA) modes, leading to longer battery runtime. Configurable interrupts help save system power and free up the host from continuous polling. Accurate temperature sensing is supported via an external thermistor.

Customers can use preloaded CEDV parameters in ROM or can generate custom chemistry parameters using TI’s web-based tool, GAUGEPARCAL. Custom-generated parameters can be either programmed in the device RAM by the host on power up of the system or customers can program the parameters to an onboard One-Time Programmable (OTP) memory.

Battery fuel gauging with the bq27220 device requires connections only to PACK+ (P+) and PACK– (P–) for a removable battery pack or embedded battery circuit. The tiny, 9-ball, 1.62 mm × 1.58 mm, 0.5-mm pitch NanoFree™ chip scale package (DSBGA) is ideal for space-constrained applications.

Features

  • Single-Cell Li-Ion Battery Fuel Gauge
    • Resides in Pack or on System Board
    • Supports Embedded or Removable Batteries
    • Powers Directly from Battery with Integrated LDO
    • Supports a Low-Value (10-mΩ) External Sense Resistor
  • Ultra-Low Power Consumption in NORMAL (50 µA) and SLEEP (9 µA) Modes
  • Battery Fuel Gauging Based on Compensated End-of-Discharge Voltage (CEDV) Technology
    • Reports Remaining Capacity and State-of-Charge (SOC) with Smoothing Filter
    • Adjusts Automatically for Battery Aging, Self-Discharge, Temperature, and Rate Changes
    • Provides Battery State-of-Health (Aging) Estimation
  • Microcontroller Peripheral Supports:
    • 400-kHz I2C™ Serial Interface
    • Configurable SOC Interrupt OR Battery Low Digital Output Warning
    • Internal Temperature Sensor OR Host-Reported Temperature OR External Thermistor

Application Diagram

more information: https://www.ti.com/product/BQ27220

MAX16054 – On/Off Controller with Debounce and ±15kV ESD Protection

Posted on by mixos

The is a pushbutton on/off controller with a single switch debouncer and built-in latch. It accepts a noisy input from a mechanical switch and produces a clean latched digital output after a factory-fixed qualification delay. The MAX16054 eliminates contact bounce during switch opening and closing. The state of the output changes only when triggered by the falling edge of the debounced switch input; the output remains unchanged on the rising edge of the input. Robust switch inputs handle ±25V levels and are ±15kV ESD protected for use in harsh industrial environments. The MAX16054 features a complementary output, OUT, which is the inverted state of OUT. An asynchronous CLEAR input allows an external signal to force the output flip-flop low. Undervoltage-lockout circuitry ensures that OUT is in the off state upon power-up. The MAX16054 requires no external components, and its low supply current makes it ideal for use in portable equipment. The MAX16054 operates from to +5.5V single supply. The MAX16054 is offered a 6-pin thin SOT23 package and operates over the to +125°C automotive temperature range.

Key Features

  • Robust Inputs Can Handle Power Supplies Up to ±25V
  • ±15kV ESD Protection
  • Latched Output
  • Low 7µA Supply Current
  • Operates from 2.7V to 5.5V
  • -40°C to +125°C Temperature Range
  • Thin SOT23 Package

more information: https://www.maximintegrated.com/en/products/power/supervisors-voltage-monitors-sequencers/MAX16054.html

SRC0 – Smart push-button on/off controller with Smart Reset and power-on lockout

Posted on by mixos

The SRC0 devices monitor the state of connected push-button(s) as well as sufficient supply voltage. An enable output controls power for the application through the MOSFET transistor, DC-DC converter, regulator, etc. If the supply voltage is above a precise voltage threshold, the enable output can be asserted by a simple press of the button. Factory-selectable supply voltage thresholds are determined by highly accurate and temperature-compensated references. An interrupt is asserted by pressing the push-button during normal operation and can be used to request a system power-down. The interrupt is also asserted if undervoltage is detected. By a long push of one button (PB) or two buttons (PBand SR) either a reset is asserted or power for the application is disabled depending on the option used. The device also offers additional features such as precise 1.5 V voltage reference with very tight accuracy of 1%, separate output indicating undervoltage detection and separate output for distinguishing between interrupt by push-button or undervoltage.
The device consumes very low current of 6 μA during normal operation and only 0.6 μA current during standby.

The SRC0 is available in the TDFN12 package and is offered in several options among features such as selectable threshold, hysteresis, timeouts, output types, etc.

Features

  • Operating voltage 1.6 V to 5.5 V
  • Low standby current of 0.6 μA
  • Adjustable Smart Reset™ assertion delay time driven by external CSRD
  • Power-up duration determined primarily by push-button press
  • DebouncedPBand SRinputs
  • PBand SRESD inputs withstand voltage up to ±15 kV (air discharge) ±8 kV (contact discharge)
  • Active high or active low enable output option (ENor EN) provides control of MOSFET, DC-DC converter, regulator, etc.
  • Secure startup, interrupt, Smart Reset™or power-down driven by push-button
  • Precise 1.5 V voltage reference with 1% accuracy
  • Industrial operating temperature -40 to +85 °C
  • Available in TDFN12 2 x 3 mm package

Application Circuit

more information: https://www.st.com/en/reset-and-supervisor-ics/src0.html

STMicroelectronics STM66xx Smart Push-Button On / Off Controller

Posted on by mixos

STMicroelectronics STM6600/STM6601 Smart Push-Button On / Off Controllers with Smart Reset™ and power-on lockout protects against the hazards faced by battery-operated devices. These types of devices include smartphones, digital cameras, and media players. The STM6600/STM6601 controllers enable and disable power for the application depending on push-button states, signals from the processor, and battery voltage. If the battery is excessively discharged or a fault is detected in the power supply, the IC blocks power-up. These devices also implement smart-reset capabilities to enable users to safely recover gadgets that have frozen or crashed during normal operation. The STM6600/STM6601 controllers connect directly to the power and reset buttons and have circuitry to prevent external interference such as electrostatic discharges. These devices feature a very low current consumption of 6µA in normal operation and only 1µA during standby, resulting in virtually no battery drain when the application is turned off.

Features

  • Operating voltage 1.6V to 5.5V
  • Low standby current of 1μA
  • Adjustable smart reset assertion delay time driven by external CSRD
  • Power-up duration determined primarily by push-button press (STM6600) or by fixed time period, tON_BLANK (STM6601)
  • Debounced PB and SR inputs
  • PB and SR ESD inputs withstand voltage up to ±15kV (air discharge) ±8kV (contact discharge)
  • Active high or active low enable output option (EN or EN) provides control of MOSFET, DC-DC converter, regulator, etc.
  • Secure startup, interrupt, smart reset or power down driven by push-button
  • Precise 1.5V voltage reference with 1% accuracy

Block Diagram

Application Circuit

more information: https://www.st.com/en/reset-and-supervisor-ics/stm6600.html

Chhavi – Ultra-Low-Power Fingerprint Sensor Featuring ESP32 SoC

Posted on by Emmanuel Odunlade

Recent time has shown an increase in the number of fingerprint sensors and modules available in the Tech ecosystem following the need for physical security and biometric authentication for device and personnel management. One of the most recent is the new device by a hardware design company based in India – Chhavi.

Chhavi by Vicharak is a dense, wireless, touch-capacitive sensor built on ESP32 MCU with Wi-Fi and Bluetooth capabilities as well as an optional NFC features. It is based on open source code compatible with Arduino and has an FPC BM-Lite fingerprint sensor from Fingerprint which provides enhanced biometric performance in terms of accuracy and low power demand compared to optical fingerprint sensors.

Chhavi is built to meet ultra-low-power applications and high-end security requirements. The NFC feature of Chhavi is provided to solve the problem of high-quality fingerprint sensor requirements of most authentication and locking systems. There’s also an optional battery to support battery-based and mobile systems although it can be powered through a USB port.

The fingerprint sensor is further equipped with a vibration motor that can provide haptic feedback in applications such as notification of successful or unsuccessful user interface – scan. There’s also a self-generating or programmable ON/OFF switch that allows users to monitor and preserve power when the board is draining off a battery. This programmable switch can also function as a GPIO interface when the device is USB powered.

Features and Specifications Include:

Physical Features:

  • 26 x 26 x 9 mm (without battery)
  • 1x MCU reset button
  • 1x power-switch (user-configurable)
  • Vibration motor for haptic feedback

Processing:

  • 32-bit ESP32 dual-core processor operating at 240 MHz
  • 4 MB SPI flash

Connectivity:

  • CP2102 USB-to-UART converter for serial programming
  • I²C interface via PN7150

Power Management:

  • 600 mA, 3.3 V LDO regulator
  • LiPo battery management
  • Support for 250 – 500 MAh LiPo batteries
  • Capacitive finger-detection that allows for deep sleep when not in use
  • Optimized power path for low-power battery usage
  • Battery voltage-level detection
  • Power (red) & charge (orange) LEDs
  • Supply-voltage supervisor that can power down MCU when battery power is low
  • ESD protection on the USB data bus
  • Over-voltage protection (OVP) for USB power
  • Over-current protection (OCP) for USB power

Fingerprint Sensor:

  • FPC BM-LITE Module (99% accurate fingerprint sensing)
  • Automatic finger detection
  • Protective sensor coating is resistant to scratches and electrostatic discharge (ESD)
  • One-to-one verification mode
  • Front side IP rating: IPX7
  • Durability: 10 million finger placements
  • Scratch resistance (pencil hardness): 4H
  • Sensor matrix: 160 x 160 pixels
  • Number of pixels: 25,600 pixels
  • Active sensing area: 8 x 8 mm

Wireless:

  • 2.4 GHz 802.11 b/g/n Wi-Fi via ESP32
  • Bluetooth BLE 4.2 via ESP32
  • (Optional) 13.56 MHz NFC
  • 3D antenna

NFC Specifications & RF Protocols:

  • PN7150 NFC controller
  • NFCIP-1  & NFCIP-2
  • ISO/IEC 14443A, ISO/IEC 14443B PICC, and NFC Forum T4T modes via host interface
  • NFC Forum T3T via host interface
  • ISO/IEC 14443A, ISO/IEC 14443B PCD designed according to NFC Forum digital protocol T4T platform and ISO-DEP
  • FeliCa PCD mode
  • MIFARE Classic PCD encryption mechanism (MIFARE Classic 1K/4K)
  • NFC Forum tag 1 to 5 (MIFARE Ultralight, Jewel, Open FeliCa tag, MIFARE DESFire)
  • ISO/IEC 15693/ICODE VCD mode
  • Supports card emulation as well as reader mode

Chhavi’s software support allows flexibility, easy and out-of-the-box programming for makers and DIY users with the help of its inbuilt USB-to-UART adapter. And according to Vicharak, the development of a library for ESP-IDF framework users is also on the way. Vicharak also points to Github for Chhavi’s source files and fingerprint’s website for biometric sensor information.

As of the time of this writing, Chhavi is only available for crowdfunding on CrowdSupply at $49 (for only fingerprint sensor); $59 (for the fingerprint sensor and NFC); $59 (for the fingerprint sensor and battery), and, $69 (for the fingerprint sensor, NFC and battery). An additional $8 (US) or $18 (Worldwide) shipping fee applies to all four rewards.

The funding campaign is scheduled to end on Nov 18, 2021, at 03:59 pm PST (11:59 pm UTC) for manufacturing to commence immediately. To join the funding campaign, and get more information on Vicharak’s Chhavi, visit CrowdSupply.

Embedded AI platform combines 16-core NXP Layerscape LX2160A processor with up to 5x Hailo-8 NPUs

Posted on by Emmanuel Odunlade

MicroSys Electronics, a world leader in embedded systems, has gone into partnership with Leading AI chipmaker, Hailo, to launch a scalable embedded platform for AI processing at the edge.

The company released a miriac® AIP-LX2160A dev kit with up to 5x integrated Hailo-8™ AI accelerator modules for processing performance up to 130 TOPS. They also released a miriac® MPX-LX2160A module which is used as a foundation for the kit.

The AIP-LX2160A kit is equipped with 2x 25GbE, 2x 10GbE, 2x 1GbE ports as well as 16x PCIe lanes (PCIe x8, PCIe x4, and PCIe x4, each with 2.5, 5 or 8Gbps support). The dev kit also has 4x SATA III, 1x microSD, 4x USB 3.0 host, a micro-USB 3.0 OTG port, 3x serial ports (UART/USB console, TTL, and RS485) JTAG, FlexSPI, 2x I2C, 6x-in/6x-out SPS, 4x LEDs, temperature sensors, fan controller, boot select, an RTC, a 12V input and ATX power supply with a 200W minimum, and 0 ~ 80°C operating range.

The MPX-LX2160A module, on the other hand, runs Linux on NXP’s 16-core, Cortex-A72 Layerscape LX2160A, which we have seen on high-end networking boards. The module also offers 2 Gbits Octal SPI flash, 8GB to 256GB eMMC, and up to 128GB of DDR4.

Hailo’s Hailo-8 M.2 AI acceleration module for AI applications offers industry-leading AI performance for edge devices. The combination of the Hailo-8™ AI acceleration module and the Arm® Cortex® NXP® Layerscape® platforms offers the benefit of integrating highly efficient AI in connected edge appliances. According to MicroSys, the embedded platform is the first ever to deploy up to 5x Hailo-8 cards on a single device and the aim is to help users get the most out of AI and neural networks.

“Hailo’s AI processor allows edge devices to run full-scale deep learning applications more efficiently, effectively, and sustainably while significantly lowering costs. In combination with our NXP processor-based platforms, our customers get one of the most powerful AI solutions that can be developed for edge applications,”

says Managing Director at MicroSys Electronics.

Features:

  • 5x parallel Hailo-8 AI modules for massive processing performance up to 130 TOPS
  • Full Hailo-8 performance combined with maximum power efficiency (FPS / W ratio)
  • Up to 955 YOLOv5m / 6145 Resnet_v1_50 / 5200 Ssd_mobilenet_v1 object detection frames (416×416) per second performance
  • Hailo AI ecosystem incl. AI toolchain and developer tools
  • Deep learning pre-trained models for various computer vision tasks

Applications:

The high-performance application-ready AI platform is perfect for a wide range of applications in fields like Industry 4.0, automotive and heavy machinery. These include:

  • predictive maintenance
  • collaborative robotics,
  • video surveillance servers in systems with distributed cameras
  • communication servers for autonomous vehicles in logistics and agriculture
  • heavy equipment for construction, as well as,
  • edge servers in trains where multiple GigE Vision camera streams are analyzed with AI

There are no details on the price and availability of both the miriac AIP-LX2160A kit or miriac MPX-LX2160A module but further details may be found on the product page or the company’s announcement page.

TOP PCB Companies