Attiny45 EMF Sensor

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by Khaleel123 @ instructables.com:

This sensor is very sensitive and can pick up electrical signals from anything that uses power. It displays the amount of interference it picks up by sequentially lighting 4 led’s one after the other. I have tested it all around the house and its been kinda fun to see how different things compare. It can also be used to follow house electrical wiring inside the walls, yes its that sensitive.

Attiny45 EMF Sensor – [Link]

Transparent ESP8266 WiFi-to-Serial Bridge

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jeelabs @ github.com has written a firmware for ESP8266 that enables it to talk to RS232 of your mcu via WiFi and also programm your mcu via WiFi. He writes:

This firmware connects an attached micro-controller to the internet using a ESP8266 Wifi module. It implements a number of features:

  • transparent bridge between Wifi and serial, useful for debugging or inputting into a uC
  • flash-programming attached Arduino/AVR microcontrollers as well as LPC800-series and other ARM microcontrollers via Wifi
  • outbound TCP (and thus HTTP) connections from the attached micro-controller to the internet
  • outbound REST HTTP requests from the attached micro-controller to the internet, protocol based on espduino and compatible with tuanpmt/espduino

The firmware includes a tiny HTTP server based on esphttpd with a simple web interface, many thanks to Jeroen Domburg for making it available! Many thanks to https://github.com/brunnels for contributions around the espduino functionality.

Transparent ESP8266 WiFi-to-Serial Bridge – [Link]

Building our own backup server using the Raspberry PI

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by Michal Remias @ wpress.io:

We’ve been always thinking about building our own backup server using the ARM solution of Raspberry PI. When we needed to manage approx. 25 WordPress web projects couple of months ago we did some experiments with MainWP on virtual server at DigitalOcean.

To make the server a bit more reliable and stable, we decided to add a standalone power supply and a bit of intelligence to the whole solution. The additional components are not necessary but will help you to keep the server running even in the case of short power failures which could lead to damage of the backup files and errors in database.

Building our own backup server using the Raspberry PI – [Link]

Bias generators with ultralow noise and ripple for sensitive circuits

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The LT®3095 generates two low-noise bias supplies from a common input voltage ranging from 3V to 20V. Each channel includes a fixed frequency, peak current-mode step-up switching regulator and a low-noise, singleresistor- programmable 50mA linear regulator. The linear regulator’s high power supply ripple rejection (PSRR) combined with its low-noise performance results in less than 100μVP-P output ripple and noise.

Bias generators with ultralow noise and ripple for sensitive circuits – [Link]

Charger interface IC avoids handset overheating at fast-charge rates

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by Graham Prophet @ edn-europe.com:

Power Integrations offers a charger interface IC compatible with Qualcomm’s Quick Charge 3.0 specification; PI says its CHY103D IC optimises efficiency to prevent handset overheating during high-speed charging.

Added to the ChiPhy charger-interface IC family, PI saya this is the first IC for off-line AC-DC chargers compatible with the Quick Charge (QC) 3.0 protocol from Qualcomm Technologies. Used alongside Power Integrations’ InnoSwitch AC-DC switcher ICs, the CHY103D device incorporates all of the functions needed to support QC 3.0. The QC 3.0 protocol implemented in the CHY103D device substantially reduces losses in the smart mobile device handset during rapid charging. This permits system designers to choose to charge handsets faster or reduce phone touch-temperature during charging, and enhances the efficiency of the charging process.

Charger interface IC avoids handset overheating at fast-charge rates – [Link]

Atmel’s latest processor uses less juice

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by Martin Cooke @ elektormagazine.com:

Atmel has announced a new series of Atmel | SMART ARM® Cortex®-A5-based microprocessors (MPUs). Firmly targeted at IoT applications they are said to deliver the world’s lowest power consumption for all MPUs in their class. They deliver sub 200 µA in retention mode with context preserved, 30 µs ultra-fast wake-up and a new backup mode with DDR in self-refresh at only 50 µA. Among the built-in features of the Atmel | SMART SAMA5D2 series includes a complete audio subsystem, lower pin-count and ultra-small package. The integrated PCI-level security capabilities will find applications in IoT devices, wearables and point of sale (POS) equipment.

Atmel’s latest processor uses less juice – [Link]

Simple Infrared Barrier

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by Maurizio @ dev.emcelettronica.com:

Although a remote control is not so difficult to design and build, there is an even simpler option: the IR barrier. This consists of a constant IR signal permanently going from an emitter to a receiver, both of them being in two different places (a few meters apart). When an obstacle comes in between the emitter and the receiver, the IR signal is blocked and the receiver senses that it is missing, flagging the event in an appropriate manner (figure 1).

The principle of operation is simple enough, and with most components taken off the shelf, it is easy to design the schematic. The IR element in the emitter is a simple IR LED. This behaves absolutely like any other LED, with the sole exception that it emits light in the infrared spectrum. The emitted light is thus invisible to human eye, but it is meant to excite the infrared receiving element on the other side of the barrier. One important element of this LED is the wavelength of the emitted light, of which we already know that is in the infrared spectrum.

Simple Infrared Barrier – [Link]

S.M.A.R.T. Alarm Clock

by Tony DiCola @ makezine.com:

Wouldn’t it be nice to have an internet-connected alarm clock that automatically sets itself, based on your calendar? You would never miss an early appointment, never forget to set your alarm, and enjoy more restful sleep knowing you’ve solved the nightmare of regulating your alarms. An internet-savvy alarm clock could even watch your inbox and wake you up if friends or family send you an important email.

This S.M.A.R.T. Alarm Clock (Setup for Meetings, Appointments, Reminders, and Tasks) uses the Arduino Yún, which is a special Arduino with two processors. One processor runs an embedded version of Linux and is connected to the internet over wi-fi or Ethernet. The other processor uses the same chip as the Arduino Leonardo microcontroller, allowing the Yún to work with most Arduino shields and accessories. By using the Arduino Yún, this project can talk to complex web services with the Linux processor, and interface with hardware — an LCD touchscreen — on the second processor.

S.M.A.R.T. Alarm Clock – [Link]

Simplify yourself a mechanical design of a device

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With suitable spacers and other fastening technology you´ll use a space optimally while gaining a stable and professional construction at the same time.

Success and reliability of a device depends not only on laboratory tests in “ideal conditions” but also on its mechanical construction. Elimination of mutual influence (EMC), optimal space usage, resistance to vibrations, easy assembly at production are one of factors why it´s worth to design mechanical part of a device into details.

At production of prototypes or small series it may be not that important how demanding is to assemble the device into a final form. However at bigger series, the time- and cost-effectivity of every production step will be visible very soon. Suddenly you´ll find out, that for example 1000 pcs of a given device can be finalised (mechanically) within a week, but by simplifying a mechanical design it might be done substantially sooner.

Also for this reason a huge amount of mechanical and electro-mechanical components can be found on the market. If your company grows and your production batches getting bigger, probably you´ve already found out, that certain mechanical component (spacer, cable gland, insulating washer, …)which seemed to you to be a kind of “useless” would save you a lot of time and made a production more effective. This finding is typical if you start to produce hundreds to thousands of pieces.

Our aim is to always provide you complete solution from development up to final production, that´s why in our portfolio can be found lots of mechanical and electromechanical components, mainly marks EttingerKeystone electronics and Toolcraft.

A few attached images may be more illustrating than thousand words. So if you´re searching for any component for construction of your device, try to look at the “assembling material” segment and if you´ll find what you´re searching for, we´ll deliver it to you immediately from our stock or in a short lead-time at favourable conditions (items on request).


Simplify yourself a mechanical design of a device – [Link]

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