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TPS25750 – Highly integrated USB Type-C® and USB PD controller with pre-configured GUI

Posted on by mixos

Texas Instruments TPS25750 USB Type-C & Power Delivery (PD) Controller is optimized for applications supporting USB-C PD Power. The TPS25750 integrates fully managed power paths with robust protection for a complete USB-C PD solution. The Texas Instruments TPS25750 also integrates control for external battery charger ICs for added ease of use and reduced time to market. The intuitive web-based graphical user interface (GUI) will ask the user a few simple questions on the application’s needs using clear block diagrams and simple multiple-choice questions. As a result, the GUI will create the configuration image for the user’s application, reducing much of the complexity associated with competitive USB PD solutions.

Features

  • Integrated fully managed power paths
    • Integrated 5V, 3A, 36mΩ sourcing switch (TPS25750S/D)
    • Integrated 28V, 7A, 16mΩ bi-directional load switch (TPS25750D only)
  • Standalone USB Type-C PD solution
    • No firmware development or external micro-controller needed
  • Integrated robust power path protection
    • Integrated reverse current protection, overvoltage protection, and slew rate control the high-voltage bi-directional power path
    • Integrated undervoltage and overvoltage protection and current limiting for inrush current protection for the 5V/3A source power path
    • 26V tolerant CC pins for robust protection when connected to non-compliant devices
  • Optimized for power applications
    • Integrated I2C control for TI battery chargers
    • Web-based GUI and pre-configured firmware
    • Optimized for power consumer only (sink) (UFP) applications
    • Optimized for power provider (source) and power consumer (sink) (DRP) applications
  • SB Type-C power delivery (PD) controller ten configurable GPIOs
    • BC1.2 charging support
    • USB PD 3.0 compliant
    • USB Type-C specification complaint
    • Cable attach and orientation detection
    • Integrated VCONN switch
    • Physical layer and policy engine
    • 3.3V LDO output for dead battery support
    • Power supply from 3.3V or VBUS source

Reference Design

more information: https://www.ti.com/product/TPS25750

Get the All NEW Raspberry Pi PoE+ HAT for $20

Posted on by Abhishek Jadhav

Raspberry Pi PoE+ HAT

If you start a project on your favorite SBC in the market, Raspberry Pi, then you want fewer cables to run around the hardware. When you power the Raspberry Pi, you also require a separate ethernet connection that makes it two cables running across the hardware, making it look cumbersome. To solve this issue, we first saw the PoE HAT released a couple of years ago by the Raspberry Pi Foundation that makes this easy and simpler by combining both the cables into one. Now with this HAT, you can power the SBC over the ethernet. If we have one official PoE HAT in the market, why do we need yet another one? Let’s say you want to deliver more power than 20 watts, then the normal PoE HAT doesn’t support this due to the operation of only 802.3af.

The all-new PoE+ HAT comes with the support for 802.3af as well as 802.3at. Now, if you wonder why so much power is required, think of a device like a camera or a video IP phone, then in such cases, PoE HAT doesn’t work. But if you only plan to use Wi-Fi, then the predecessor can be a good option. However, due to the same pricing, it does not really matter in terms of cost. Another change that comes with this hardware is to reduce heat dissipation.

“We replaced the diode rectifier with an “ideal diode” rectifier, in the form of a Microchip PD70224ILQ device,”

the manufacturer notes.

Latest Raspberry Pi PoE+ HAT

If you buy this PoE+ HAT, then you don’t need to make any changes to the main controller board, in this case, Raspberry Pi 3B+ and 4B other than updating the Pi’s software. The fan that sits on top of the HAT is controlled by the I2C connection with Raspberry Pi and works automatically depending on the temperature of the processor. The same pricing as the predecessor of $20 makes it one of the best options if you need PoE+ HAT for your Raspberry Pi-based projects. Depending on where you live, the availability of the board varies, but for those living in the US, SparkFun is up for pre-orders but with no estimated shipping date. It would be interesting to see camera-based projects on your Raspberry Pi using this PoE+ HAT.

Low Profile 2 Channel Solid State Relay for AC Loads

This project offers an extremely compact solution for interfacing 2 high voltage resistive or inductive loads. At a low profile, this is the most compact & versatile optically isolated 2 channel solid state relay system. The circuit consists of 2x Triacs and isolated Triac drivers. The circuit is compatible with TTL input signals and controls 90V-220V AC loads. Sscrew terminal connectors are provided for an easy connection of the AC loads and AC supply input. Interfacing an Arduino/Micro-controller or other circuit is easy using the 4 Pin header connector. A snubber circuit across Triacs is formed using R2, R6, C1, and C2 and is optional for inductive loads. For resistive loads do not populate the snubber circuit. Resistors R3, R4 are for current limiting for internal LED of the isolator. Use jumper J1 for common cathode, otherwise, 2x anode and cathode can be used. Each channel can drive a load up to 100W (220V AC). This circuit can on/off load like Solenoid, AC motor, Fan, Lamp.

What is Solid State Relay??

A solid-state relay (SSR) is an electronic switching device that switches on or off when an external AC or DC voltage is applied across its control terminals. It serves the same function as an electromechanical relay, but has no moving parts and therefore results in a longer operational lifetime.

Arduino Code

Arduino example code available as a download to test the board. Connect A1, A2 ( Anode) to Arduino D8, D9, and C1, C2 (Cathode) GND.

Features

  • AC Supply 90V to 220V AC
  • Load 100W X 2
  • Trigger Signal TTL Compatible (3-5V) (Anode and Cathode)
  • PCB Dimensions 51.12 x 46.67 mm

Schematic

Parts List

SR.QNTY.REF.DESCMANUFACTURERSUPPLIER SUPPLIER PART NO
13CN1, CN2, CN42 PIN SCREW TERMINAL 5.08 MM PITCHPHOENIXDIGIKEY277-1247-ND
21CN34 PIN MALE HEADER 2.54MM PITCHAMPHENOLDIGIKEY69190-104HLF
31C10.01uF/250V X 2 ACVISHAYDIGIKEY720-1586-1-ND
41J1JUMPERPCB JUMPER
52Q1,Q2MAC4DHMLITTILE FUSE INCDIGIKEYMAC4DHMT4GOSCT-ND
62R1,R5360E 5% SMD SIZE 1206MURATA/YAGEODIGIKEY
72R2,R639E 5% SMD SIZE 2512VISHAYDIGIKEY541-39XCT-ND
82R3,R7470E 5% SMD SIZE 1206MURATA/YAGEODIGIKEY
92R4,R8330E 5% SMD SIZE 1206MURATA/YAGEODIGIKEY
102U1,U2FOD410ON SEMIDIGIKEYFOD410-ND

Connections

Gerber View

Photos

Video

FOD410 Datasheet

ON Semiconductor NCP1117 LDO Regulators – 1 A, Fixed and Adjustable, Positive

Posted on by mixos

ON Semiconductor NCP1117 LDO Regulators provide an output current in excess of 1.0A with a maximum dropout voltage of 1.2V at 800mA over temperature. The series contains nine fixed output voltages of 1.5V, 1.8V, 1.9V, 2.0V, 2.5V, 2.85V, 3.3V, 5.0V, and 12V. The output voltages have no minimum load requirement to maintain regulation. Also included is an adjustable output version that can be programmed from 1.25V to 18.8V with two external resistors.

Features

  • Output current in excess of 1.0A
  • 1.2V maximum dropout voltage at 800mA over temperature
  • Fixed output voltages of 1.5V, 1.8V, 1.9V, 2.0V, 2.5V, 2.85V, 3.3V, 5.0V, and 12V
  • Adjustable output voltage option
  • No minimum load requirement for fixed voltage output devices
  • Reference/output voltage trimmed to ±1.0%
  • Current limit, safe operating, and thermal shutdown protection
  • Operation to 20V input
  • NCV prefix for automotive and other applications requiring unique site and control change requirements; AEC-Q100 Qualified and PPAP capable
  • These are Pb-free devices

more information: https://www.onsemi.com/products/power-management/ldo-regulators-linear-voltage-regulators/ncp1117

Wide aspect ratio display delivers excellent colour performance

Posted on by mixos

Industrial LCD manufacturer KOE (Kaohsiung Opto-Electronics) has announced the introduction of a new high-performance 6.2-inch TFT display module. The TX16D206VM0BAA TFT display features HVGA resolution (640 x 240 pixels), a wide 8:3 aspect ratio, and IPS (in-plane switching) technology which delivers exceptional optical performance.

The KOE TX16D206VM0BAA display module provides the ideal solution for use in process control systems, industrial HMI, and medical monitoring equipment. Featuring the latest IPS display technology, the 6.2-inch display delivers excellent colour saturation and image stability, high contrast and highly saturated black levels. Exceptional all-round viewing angles of up to 170° are enabled (left/right, up/down).

The 6.2-inch display module provides strong optical performance, with a contrast ratio of 1200:1 and a long lifetime white LED backlight with a specified brightness rating of 400cd/m². These key features ensure that display images are bright, consistent and exhibit high accurately colour reproduction.

Benson Huang, marketing manager, KOE said:

“In-plane switching technology provides highly consistent colour and accurate image reproduction. These are essential requirements for display systems used in medical, audio visual, professional broadcast and a growing number of industrial applications. The 6.2-inch display offers a compact but versatile letterbox format which can be easily accommodated in product designs for measurement and monitoring equipment, and rack-mounted systems.”

The 6.2-inch letterbox format display module has compact mechanical outline dimensions of 173.0mm (w) x 70.0mm (h) x 7.0mm (d) and an active display area of 148.8mm (w) x 53.76mm (h).

A 40-pin CMOS data interface supports 6-bit digital RGB and offers a color palette of up to 262K colors. Also available from KOE are 6.2-inch TFT display modules supporting a LVDS data interface and touch screen options.

With continuity of supply essential for many industrial, medical, and professional applications and systems, KOE is fully committed to developing and manufacturing premium, high quality display modules, and ensuring long-term product availability.

KOE’s new TX16D206VM0BAA can now be sourced and supplied for a minimum period of 5 years. The 6.2-inch TFT display module is now available from KOE’s worldwide sales channel and distribution partners.

more information: http://www.koe.j-display.com

Cererbras’ All NEW Wafer Scale Engine Packs 2.6 Trillion Transistors For Deep Learning Workloads

Posted on by Abhishek Jadhav

Cerebras Wafer Scale Engine

In 2019, we saw one of the largest single computer chips manufactured by a California-based AI startup, Cerebras, that unveiled the Wafer-Scale Engine for deep learning applications. The 1.2 trillion transistors-packed Wafer-Scale Engine came with 18GB of on-chip SRAM and an interconnect speed of 100 Pb/s (Petabytes per Second). After two years of development, the manufacturer has launched the next generation WSE-2 at the Linley Spring Processor Conference 2021.

To meet the computational requirements of deep learning tasks, the all-new Wafer Scale Engine comes in the same size as its predecessor of 46,255 mm2 but features more capabilities than ever before. The Cerebras Wafer Scale Engine 2 packs 2.6 trillion transistors with more than 800,000 cores, making it the most powerful single computer chip ever made that is entirely optimized for deep learning workloads.

“In AI compute, big chips are king, as they process information more quickly, producing answers in less time—and time is the enemy of progress in AI,”

Dhiraj Malik, vice president of hardware engineering, said in a statement.

Cerebras Wafer Scale Engine

With the increase in training time for deep learning models that are distributed over thousands of GPUs makes it more complex for deployment. This one device takes care of everything, “making orders-of-magnitude faster training and lower-latency inference easy to use and simple to deploy.” The Wafer Scale Engine adds 40 GB on-chip SRAM and an interconnect speed of 220 Pb/s, which is more than double the predecessor keeping the exact size of the wafer.

Like the first-generation Wafer Scale Engine, the AI-cores are easy to program with a robust Cerebras software platform integrating with widely used machine learning frameworks, including TensorFlow and PyTorch. For more details on the new high-performance Wafer Scale Engine, it is available on the product page, but no information on the pricing yet, so we expect it to be costly.

LILYGO TTGO Simulation Nixie tube based on ESP32

Posted on by DM

Nixie tube is an electronic device for displaying numerals or other information using glow discharge. When a voltage is applied between two electrodes in a glass tube containing low-pressure gas, the flow of electric current through the gas makes plasma. This phenomenon is called glow discharge. First introduced in 1955, the Nixie displays are legendary. The retro nixie displays had a single anode, multiple cathodes shaped like numerals 0-9 stacked on top of one another. Applying the power to one cathode will make the numeral glow. The tube is filled with a low-pressure gas that creates an orange glow discharge. These legendary displays, however, are no longer mass-produced. Maybe there are a few of them being made which are very expensive. In addition, they need high-voltage drivers.

Therefore, simple replicas are being created that look very much like nixie displays, and they work effectively. Here, mostly the numbers are engraved on ten transparent plates and are stacked on top of one another. LEDs are used for illumination from the edge of each plate. The LEDs light up, and only the number selected is displayed; everything else remains transparent.

Nowadays, nixie displays are implemented by IPS LCDs which can not only display numerals but images that you can upload via your computer. LILYGO TTGO Simulation Nixie tube or the T-Nixie tube is the nixie tube ‘lookalike’ which is based on IPS LCD. It is based on the LILYGO TTV product motherboard with a 16:9 1.14-inch IPS screen, which is made by adding a cylindrical glass tube to simulate the appearance of a Nixie tube. The tube can be controlled via the standard infrared remote control. Further, it is programmable, which means we can display any content on the tube. Arduino and Micropython are the compatible development environments supported by the tube.

Features of the product:

  • TTGO T-Micro32 module ESP32 V3 Bluetooth and WiFi
  • 4MB Flash
  • RTC PCF8563
  • 1.14 inch IPS LCD
  • Glass tube
  • Infrared receiving sensor
  • TTP223 touch button
  • Type-C
  • I2C/UART (adapt to T-WATCH sensor kit and T-FH interface sensor module)
  • Reset button

The TTGO T-Micro32 module used in this nixie tube is the Wi-Fi Wireless Bluetooth Module which is similar in functionality to the normal ESP32 module. But the area is reduced by 45% such that more compact devices can be designed.

The T-Nixie tube can be used to learn to program, as desktop ornaments, STEM education, DIY development creation, etc.

“You can learn to develop the simulation Nixie tube interface, dot matrix interface, and other interesting interfaces through the built-in RTC clock circuit of this product.”

The kit is sold on Aliexpress costing 27.5 USD. T-type USB cable and an IR remote control along with the T-Nixie tube.

Github link：https://github.com/Xinyuan-LilyGO/T-NixieTube

Meet Jetson Xavier NX based BOX PC – DSBOX-NX2

Posted on by Abhishek Jadhav

DSBOX-NX2

With the increasing popularity of the NVIDIA Jetson Xavier NX for its high-performance best-in-class deep learning accelerator, many manufacturers in the embedded electronic devices have started to release modules that work on this AI-edge device. One of the most recent releases was the industry’s first industrial AI smart camera for AI vision solutions. With the continued growth of adoption of NVIDIA Jetson Xavier NX, Forecr that is known for its NVIDIA Jetson based Industrial BOX PCs comes with the newly launched DSBox-NX2. This fanless box PC is specifically designed for industrial applications.

The next-generation industrial computer gives supercomputer performance multi-stream deep learning edge analytics with options to choose from the SSD storage that goes up to 2TB. The claim of supercomputer performance comes from the capability to decode up to 32 video streams in 1080p at 30fps, which is very unlikely to happen with the Raspberry Pi SBC. The famous NVIDIA processor gives 21 TOPS AI performance, which is more than enough for many of the mission-critical applications that require high-performance deep learning accelerators.

DSBOX-NX2 Interfaces

With all the information on the product page, it is very clear that this PC plans to be the best-in-class for vision-AI applications that sometimes require multiple stream video processing using deep learning algorithms. For this, NVIDIA’s DeepStream is a complete SDK for AI-based multi-sensor processing that comes from video, audio and image. Giving such high performance and utilizing the CPU and GPU at their fullest makes us think about the heating and operating temperature of the device. Thanks to the manufacturer, with a broader range of operating temperatures of -25⁰C to +65⁰C and the fanless system makes it perfect for any and all kinds of industrial applications.

The manufacturer has designed the BOX PC with rich interfaces that lets you connect a high-resolution camera through a USB interface or even expand the storage through SSD on M.2 slot. After the initial testing by the manufacturer, the throughput of over 7 GB/sec with PCIe Gen 4 M.2 SSDs was observed. “Gigabit Ethernet utilization tests show over 900MBits/sec compared to the 1 Gbps theoretical limit of this interface.”

Those who are interested in the product can look for more information on the product page where it is priced at €749 and goes up to €1189 for a 2TB SSD.

Stefan Wagner’s NeoController Tests and Controls NeoPixel LED Strips

Posted on by Abhishek Jadhav

NeoPixel Tester

When you buy any small development board, one of the first things you try is interfacing the programmable NeoPixels. One such example we saw was in the case of Raspberry Pi Pico, which interfaced the NeoPixels using the programmable IOs. If you have been following the maker community, you might have heard about Stefan Wagner and his exciting projects. Lately, he [Stefan Wagner] has designed a tester built on the ATTINY 13 microcontroller for 800kHz NeoPixel strips.

With the small form factor of 21.6mm x 11.4mm you can easily solder the PCB to the NeoPixel LED strip without any problem. However, while designing the tester, he realized the amount of capabilities ATTINY 13 microcontroller could showcase. With this thought, he went ahead and added an IR receiver to the PCB that can control some of the parameters using the IR control remote.

NeoPixel Tester PCB

Regarding the hardware circuitry for the tester, it looks very straightforward as shown in the figure below. The microcontroller chip is directly connected to the output of the IR receiver (TSOP4838) and connected to the NeoPixel through a resistor of 330 ohms.

“The control of NeoPixels with 8-bit microcontrollers is usually done with software bit-banging. However, this is particularly difficult at low clock rates due to the relatively high data rate of the protocol and the strict timing requirements,” Stefan explains.

Moreover, after the project, he noticed that the timings mentioned in the datasheet were nowhere close to the actual implementation. He [Stefan Wagner] has provided the timing rules that should work with all 800kHz addressable LEDs in the project’s GitHub repository.

In the end, Stefan notes that more than one-third of the flash memory is available for makers to explore more capabilities of the ATTINY 13 microcontroller for controlling NeoPixels. The IR implementation including decoding and error detection only takes 228 bytes of flash memory. Note that you can also use other 38kHz IR receivers other than TSOP4838.

If you plan to work on this project, you need to program the microcontroller before soldering as there is no ICSP header provided onboard. The designer has given a detailed guide on how to program it using Arduino IDE as well as using the precompiled hex file. Operating instructions are also available in the GitHub repo.

Jupiter Nano – Tiny, high-performance computer that runs Linux, or the NuttX real-time operating system

Posted on by mixos

Jupiter Nano is an open-source hardware development board that runs NuttX RTOS or Linux. It has a tiny 48-pin form factor (1.125″ x 2.5″, similar in size to the Teensy 4.1) and is 10x more powerful than the Arduino Due.

Jupiter Nano is perfect for Arduino users who need a tiny, powerful computer with more CPU power, lots of RAM, or an internet-connected real-time operating system (NuttX). It should also be attractive to any Linux users who need a tiny, open-source hardware computer with lots of I/O and high-speed Wi-Fi. The applications for a board this small, and this powerful, are nearly endless.

Features & Specifications

  • Open-source hardware development board
  • Runs NuttX RTOS or Linux
  • Size: Tiny 48-pin form factor (1.125″ x 2.5″, similar in size to Teensy 4.1)
  • Programming: JTAG port for programming and debugging
  • CPU: Microchip SAMA5D27C-LD1G running at 498 Mhz
  • DRAM: AP Memory AD2100XXX 128 M x 32 LPDDR2 DRAM chip integrated into system-in-package (SIP)
  • Power management: Quorvo ACT8945A with integrated LiPo battery charging capability
  • Power delivery: Compatible with many LiPo batteries
  • Designed in KiCAD: the hardware design can be altered using 100% open source KiCAD software
  • 10x more powerful than the Arduino Due:
    • ARM Cortex A5 processor running at 498 Mhz (7x clock speed of the Arduino Due)
    • 128 MB RAM (1280x RAM of Arduino Due)
    • Key peripherals use DMA (USB, SPI, I2C, Flexcom)
  • I/O:
    • USB 2.0 HS port on USB-micro B jack (Port A, 480 Mbps, host or device)
    • USB 2.0 HS port on a pin-header connection (Port B, 480 Mbps, host only)
    • USB 2.0 FS Debug console port on USB-micro B jack (12 Mbps)
    • SD Card slot – 50 MHz DDR – device boots from the card (this means it is impossible to brick the device)
    • Native SPI and I2C ports
    • 4 FLEXCOMs on I/O pins – flexible serial controller peripherals that can be SPI, UART, or I2C

Open Source

Open-source information, such as the board KiCAD files, schematics, project files, and software will be provided once the campaign is fully funded.

Photos and text are sourced from www.crowdsupply.com

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