Isolated 24V to 12V 10W Flyback Power Supply

maximintegrated.com power supply experts have a reference design of a 24V to 12V flyback converter.

Maxim’s power supply experts have designed and built a series of isolated, industrial power-supply reference designs. Each of these power supplies efficiently converts 24V into useful voltage rails at a variety of power levels. Every power rail is isolated with a readily available transformer from multiple, global vendors, providing for quick, convenient transformer selection. Each design has been tested for load and line regulation, as well as efficiency and transient performance. As with all Maxim reference designs, the BOM, schematics, layout files, and Gerber files are all available. In addition, boards are available for purchase; most boards feature through-hole pins for immediate board placement and accelerated prototyping.

Isolated 24V to 12V 10W Flyback Power Supply – [Link]

ATtiny85 Tiny OLED Watch

An ATtiny85 and a 64×48 OLED display hand clock:

This is the third in my series of minimalist watches based on the ATtiny85. This version displays the time by drawing an analogue watch face on a miniature 64×48 OLED display. It uses a separate crystal-controlled low-power RTC chip to keep time to within a few seconds a month, and puts the processor and display to sleep when not showing the time to give a battery life of over a year.

ATtiny85 Tiny OLED Watch – [Link]

RELATED POSTS

Getting started with Python and Arduino MKR1000 for secure IoT projects

A getting start guide to program Arduino MKR1000 in Python:

The MKR1000 is described as a powerful board that combines the functionality of an Arduino Zero (already supported by Zerynth) and the connectivity of a Wi-Fi Shield, with a Cryptochip for secure communication. The design also includes a Li-Po charging circuit that allows the Arduino MKR1000 to run on battery power or external 5V, charging the Li-Po battery while running on external power.

Getting started with Python and Arduino MKR1000 for secure IoT projects – [Link]

SubPos – Wifi enabled Positioning System

A “dataless” Wi-Fi positioning system that can be used anywhere GPS can’t. Blecky @ hackaday.io writes:

The SubPos Wi-Fi Positioning System is an indoor positioning system that can be used in various environments such as metro lines, shopping malls, carparks, art galleries or even conference centers; essentially anywhere GPS doesn’t penetrate. It could also be integrated into an array of IoT enabled devices, from access points to Wi-Fi enabled light-bulbs.

SubPos – Wifi enabled Positioning System – [Link]

A64-OLinuXino board with 64-bit Cortex-A53 processor

A64-OLinuXino OSHW board is released by Olimex Ltd. It’s an open source hardware board that runs Linux and Android. Entirely designed with open source software CAD tools and source files are available on github. Schematic is here.

Features

  • A64 Cortex-A53 64-bit SoC from Allwinner
  • AXP803 PMU with Lipo charger and step-up
  • 1 or 2GB or DDR3L @672 Mhz
  • 0 / 4 or 16GB of industrial grade eMMC
  • SPI Flash in SO8 package with hardware WP (not assembled)
  • USB-OTG and USB-HOST
  • HSIC connector (not assembled)
  • Gigabit Ethernet
  • BLE/WiFi module
  • HDMI and MIPI display connectors
  • microSD card
  • Debug console serial connector
  • Audio In and Out
  • LCD display connector
  • GPIO 40 pin connector (not assembled)
  • UEXT connector (not assembled)
  • 5V power jack
  • Dimensions: 90×62.5 mm

For the moment they have three models:

  • 1G0G with 1GB RAM, no Flash, no WiFi/BLE
  • 1G4GW with 1GB RAM, 4GB eMMC and WiFi/BLE
  • 2G16G-IND with 2GB RAM, 16GB eMMC with industrial grade components -40+85C

The optional connectors and SPI Flash etc may be assembled upon request for small fee. The price of the board is 50 EUR.

A64-OLinuXino board with 64-bit Cortex-A53 processor – [Link]

Intel Optane, Intel’s Next-Generation SSD Technology

In July 2015, Intel and Micron Technology announced a new technology for memory and storage solutions called “3D XPoint™ technology“. It is a new category of nonvolatile memory that addresses the need for high-performance, high-endurance, and high-capacity memory and storage.

Now Intel had produced its Optane™ technology that provides an unparalleled combination of high throughput, low latency, high quality of service, and high endurance. The new technology is a special combination of 3D XPoint™ memory media, Intel Memory and Storage Controllers, Intel Interconnect IP and Intel® software.

From system acceleration and fast caching to storage and memory expansion, Intel Optane delivers a revolutionary leap forward in decreasing latency and accelerating systems for workloads demanding large capacity and fast storage.

3D-Xpoint memory structure, Source: Intel Corp

The first product with this technology is the Intel Optane SSD DC P4800X. It is a 375GB add-in card that communicates via NVMe over a four-lane PCIe 3.0 link, and it is available for $1,520 or $4.05 per GB.

Optane™ storage could be used in many sectors and domains. It will help healthcare researchers to work with larger data sets in real-time, financial institutions to speed trading, and retailers to identify fraud detection patterns more quickly. Optane™ technology can also be used at home to optimize personal computer for immersive gaming experience.

The 3D XPoint innovative, transistor-less cross point architecture creates a three-dimensional checkerboard where memory cells sit at the intersection of words lines and bit lines, allowing the cells to be addressed individually. As a result, data can be written and read in small sizes, leading to fast and efficient read/write processes.

Memory cells are written or read by varying the amount of voltage sent to each selector. This eliminates the need for transistors, increasing capacity and reducing cost. The initial technology stores 128Gb per die across two stacked memory layers. Future generations of this technology can increase the number of memory layers and/or use traditional lithographic pitch scaling to increase die capacity.

3D XPoint Technology Wafer

You can get more detailed information about 3D Xpoint and Intel Optane technologies through their official websites. You can also take a look at these two Intel P4800X reviews; Billy Tallis fromAnandTech and Paul Alcorn from Tom’s Hardware.

LTC2063 – 2μA Supply Current, Zero-Drift Operational Amplifier

The LTC2063 is a single low power, zero-drift, 20kHz amplifier. The LTC2063 enables high resolution measurement at extremely low power levels. Typical supply current is 1.4μA with a maximum of 2μA. The available shutdown mode has been optimized to minimize power consumption in duty-cycled applications and features low charge loss during power-up, reducing total system power.

The LTC2063’s self-calibrating circuitry results in very low input offset (5μV max) and offset drift (0.02μV/°C). The maximum input bias current is only 20pA and does not exceed 100pA over the full specified temperature range. With its ultralow quiescent current and outstanding precision, the LTC2063 can serve as a signal chain building block in portable, energy harvesting and wireless sensor applications.

LTC2063 – 2μA Supply Current, Zero-Drift Operational Amplifier – [Link]

PCB Droid – First Mobile PCB Designer App

The applications available nowadays serve our everyday life well. Would it be the need of our entertainment, business life or lifestyle. However, there is one special field where we could face a serious shortcoming and it is the engineering field. I’ve come across a demand through forums specialized in electronics for a mobile application, designing printed circuits on your mobile device.

The goal was to create an application, which can be used as a designer tool for printed circuits and exporting those into different formats in an Android and Windows 10 environment. The consumption of these mobile devices is a fraction of their desktop sidekicks and an app such makes designing easier, even in your daily commute. This realization gave birth to PCB Droid application. As an electronic hobbyist as far as I’m concerned others engaged in DIY electronics usually don’t utilize the possibilities and professionalism of these programs. In practice, PC printed circuits designers are using circuit diagrams as an input. Hobbyists pretend to prefer designer programs where they can draw the marginal strips themselves and adjust them on the printed circuits. PCB Droid doesn’t require any kind of previously made circuits diagrams. The parts can be drawn onto the printed circuit by the user starting from the basic elements to the most complex components.

PCB Droid – First Mobile PCB Designer App – [Link]

Dual die, Hall effect, latch and switch sensor is accurate & redundant

Graham Prophet @ eedesignnewseurope.com discuss about Melexis magnetic latch and switch sensors. He writes:

Melexis (Tessenderlo, Belgium) has introduced a range of new magnetic latch and switch sensors that feature two silicon dice in the same package, yielding highly reliable devices, which are aimed at automotive applications including transmission, power steering, braking and locks/latches.

Dual die, Hall effect, latch and switch sensor is accurate & redundant – [Link]

Linear Lab Power Supply with digital meter

@ instructables.com build a nice power supply for his lab. He writes:

From my point of view one of the best ways to get started in electronics is to build your own laboratory power supply. In this instructable I have tried to collect all the necessary steps so that anyone can construct his own.

All the parts of the assembly are directly orderable in digikey, ebay, amazon or aliexpress except the meter circuit. I made a custom meter circuit shield for Arduino able to measure up to 36V – 4A, with a resolution of 10mV – 1mA that can be used for other projects also.

Linear Lab Power Supply with digital meter – [Link]