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2 May 2014


The controller, host and application with integrated (field programmable) Flash memory is contained in a 6 mm x 6 mm chip. The GPIOs support both analog and digital signals. TI anticipates the chip will be useful in the field of:

Smartphone-controlled applications:

  • Keyless entry using a Bluetooth Smart Ready smartphone or Bluetooth Smart key fob, either standalone or in conjunction with TI’s car access solutions
  • Lighting controls to deliver ambient, clustered and programmable LED lighting
  • Diagnostic information to help users understand engine warning lights
  • Services with iBeacon technology for fast discovery and easy pairing with in-car Bluetooth Smart technology

A Chip to Link your Smartphone and Automobile - [Link]

2 May 2014


ASCAS @ instructables.com writes:

Control your Arduino with voice commands using an Android smartphone! Before we make a voice activated home automation system, we must first learn the basic principles of the experiment. This guide will let you command the Arduino using your Android smartphone and a HC-05 Bluetooth module.

The designer of the app did not include a sample code. I looked for alternatives in Google’s PlayStore but none was as good as the app that I’ve found. Luckily, I was able to figure it out although it took me a while to program it. Sorry IOS users, this app isn’t available in Apple’s app store :/

Voice Activated Arduino (Bluetooth + Android) - [Link]

2 May 2014

Digispark Pro – The tiny Arduino IDE ready, usb and mobile dev board and ecosystem – cheap enough to leave in any project! Wi-fi, BLE, and 25+ shields!

Serial over USB debugging, USB programmable, 14 i/o, SPI, I2C, UART, USB Device Emulation, Mobile Development Ready, Optional BT, BLE, Mesh, and Wi-Fi.

The super small, dirt cheap, always open source, Arduino compatible, USB (and Mobile and Wireless!) development (and production) platform, and follow-up to the original Digispark.

Easier to use, more pins, more program space, more features, more reliable – supporting the entire existing Digispark ecosystem of 25+ shields and adding Wi-Fi, Bluetooth, BLE shields and more! Ready for all your projects – including mobile hardware development! All still super affordable!

The Digispark Pro Ecosystem is the cheapest, Arduino compatible development platform for Mobile and Wireless hardware development.

Digispark Pro – tiny, Arduino ready, mobile & usb dev board! - [Link]

2 May 2014


Thanks to a 15-36V output voltage, it can be connected to almost every LED module and a stable output current of 1050 mA will take care for a reliable operation.

In fact, majority of features of a new a new LED driver (power supply) – LT40-36/1050 WP (1894661) were mentioned in a subject and a preface of this article. But not to be that brief, we can add, that the new LED driver features the same good properties like its familiar descried in the article – Friwo drivers not only drive your LEDs but even control them …. From the basic types it differs mainly by a water-tight design – by encapsulation in a resin, that´s why it also withstands operation in a humid or dusty environment. This version doesn´t have an external input, thus it operates only as “standalone”, in a “constant current, limited voltage” mode. Output voltage 15-36V means, that the LED driver should only supply such a module, whose forward voltage (Vf)at a given current is 15-36V, what in praxis means approx. 6-11 (12) white LEDs in series.

That´s why LT40-36/1050 operates as a power supply, whose open voltage (without a load) is 36V. This voltage remains constant up to 1000 mA current drawing and then the voltage drops down to 15V when a current reaches 1050 mA. This ensures a constant current, i.e. if we for example connect a LED module with Vf=24V, the driver will source 1050 mA current (at 24V). LT40-36/1050WP shouldn´t be used to supply modules with a Vf lower than 15V. In such case, the types handling lower voltages are suitable, for example LT10-16/700 or LT20-28/700. If we wish to reach a maximum power from a given LED driver, it´s naturally beneficial to use a LED module with a Vf on an upper level of an output voltage of a given LED driver (33-36V in this case).

Detailed information will provide you the LT series overview and datasheets at particular types.

LED driver Friwo LT40-36/1050 can be mounted even under an eaves - [Link]

2 May 2014


by Kalle Hyvönen:

I bought a small aquarium (54l) as an impulse buy and I needed some lights for it, so naturally I wanted to use LEDs. I also needed a timer for the lights. I also wanted the lights to fade in and out when they were going on or off as a cool effect.

I ordered four Cree XP-G R5 LEDs (cool white, apparently too warm of a light will cause algae growth) and a one amp (switching) constant current supply (with PWM support) from LED-tech.de. I had some Maxim DS3234 real-time clocks with a serial bus (SPI) which looked easy to implement so I decided to use one. I also had one spare Arduino board so that was going to be my microcontroller of choice. I used a laptop power supply as the power source.

LED aquarium lighting with an Arduino based PWM timer - [Link]

1 May 2014


VFD Moduar Clock IV-4 6-digit  by akafugu.jp:

This new shield design for the VFD Modular Clock is a variant of the original IV-4 shield, but with 6 digits. IV-4 tubes are Russian 16-segment VFD tubes, and can display numerals and the letters A-Z.

We’ve also designed a completely new enclosure for the IV-4 6-digit shield. It uses 2mm semi-transparent blue acrylic, and is designed to give a low-profile rounded appearance.

Creating a 6-digit IV-4 shield without redesigning the base board presented a unique challenge: The HV5812 driver used to drive the VFD tubes has 20 channels. IV-4 tubes are 16 segment displays, 20 – 16 = 4, so in other words the HV5812 driver can only support 4 IV-4 tubes.

New Product – VFD Moduar Clock IV-4 6-digit - [Link]

1 May 2014

Inter-Integrated Circuit or I²C is a multimaster serial single-ended computer bus invented by Philips Semiconductor Division, today NXP Semiconductors. This technology is used in attaching low-speed peripherals to a motherboard, embedded system, mobile phones, or other digital electronic devices.

One family of devices under I2C is the Philips Semiconductors Gunning Transceiver Logic Translator Voltage Clamp (GTL-TVC), a family of bi-directional low-voltage translators, is designed in a BiCMOS process for protecting the sensitive I/Os on new advanced sub micron components. The GTL-TVC devices offer protection from over -voltage and electrostatic discharge applied by older legacy devices and translate the VIH and VOH switching levels.The GTL-TVC devices can also be used to interface between devices I/O’s operating at different voltage levels.

This circuit uses the GTL2010PW 10-bit bidirectional low-voltage translator which provides high-speed voltage translation with low ON-state resistance and minimal propagation delay. The device allows bidirectional voltage translations between 1.0 V and 5.0 V without use of a direction pin. This allows the use of different bus voltages on each source to drain channel so that a 1.5 V device can communicate with 2.5 V, 3.3 V or 5V devices without any additional protection. The circuit shows how the GTL2010 can be used in an application where two ASIC’s I2C ports (left side) operating at 1.5 V can interface to higher voltage devices (right side) operating at 3.3V and 5.0 V. One of the ASIC ports (MDDC on S1 & S2) only needs to interface with 5V I2C devices. The other ASIC port (MI2C on S3 & S4 and S5 & S6) needs to interface with both 3.3 V SMBus and 5.0 V I2C devices.


  • GTL2010PW 10-bit bidirectional low-voltage translator
  • 1KΩ General Purpose Resistors – 2 Units
  • 2.2KΩ General Purpose Resistors – 4 Units
  • 200KΩ General Purpose Resistor

1.5V I2C Bus to 3.3V SMBus and 5.0V I2C Bus - [Link]

1 May 2014


Ioannis Kedros writes:

I just finish the assembly process of my latest super mini project! It’s nothing amazing… but its a very handy sensor module!
On board there are three commonly used sensors: SHT10, BMP085 and MPU6050. I was constantly using those ones over my last projects and I thought it will be a good idea to make a simple module with all of those. They are communicating over I2C and the module can accept voltages from 3V to 6V.

Sensor Stick - [Link]

30 Apr 2014


One of the newest types of enclosures in the Hammond portfolio are ergonomic oval enclosures perfectly suitable for various industrial controllers.

High quality enclosures from the portfolio of producer Hammond n our offer are probably familiar to you. They usually have a classic right-angle shape, perhaps except handheld enclosures series 1553 or also 1553T. This time we have here a novelty which looks quite different from all common enclosures. It is a series of plastic enclosures 1599 Tablet, specially designed for a construction of various control panels using joysticks, touch screens, membrane keyboards and other control elements. Enclosures are developed with an aim to reach an ergonomic shape and just the round corners ensure significantly better grip preventing fatigue of operator´s hands.

Company Hammond comes right with several versions and so we can choose smaller (1599TABM), bigger (1599TABL), light gray (RAL7035) or black, without or with a battery compartment. As usually, an enclosure is supplied with screws and at battery versions also with battery contacts for 4x AA batteries and 2 pcs of 9V batteries (it´s possible to choose, which contacts will be used).

Detailed information will provide you datasheets Hammond 1599TABL, 1599TABLBAT, 1599TABM and 1599TABMBAT.
This novelty is so far available upon order with a short leadtime.

Even in enclosures can be found a tablet – Hammond 1599 - [Link]

30 Apr 2014


Raj @ embedded-lab.com writes:

A group of students at Indiana university has built an Arduino-based distance measuring tool as their class project. It is a handheld device that measures the distance between any two points using the latitude and longitude coordinates (received from GPS satellite) of the points. It provides distance output in Yards and is useful for sports applications, such as in golfing to compute the distance between where a ball is hit and where it ends up.


Distance meter using GPS and Arduino - [Link]






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