Tag Archives: Bluetooth

Digital Hearing Aid using MKL02Z16VFG4

A hearing aid is a small electronic device worn in or behind the ear that amplifies incoming sounds to help people with hearing impairment. This design features a light and compact hearing aid with a soft touch sensor that allows the user to control the volume and frequency depending on the user’s preference.

This design uses MKL02Z16VFG4, an energy and size efficient microcontroller that serves as the main component of the system. It receives the signals from the sensor and microphone, and then sends the processed signal to the speaker. The system uses two amplifiers, a class AB preamplifier and a class D amplifier, both in small packages as it is desirable for the device. It is also equipped with a sensor using Si1102-A-GM that enables the user to change the volume and frequency with a simple touch. Other components can be added, such as a Bluetooth remote control.

This design is applicable for hearing aids and other sound amplification needs. Its lightweight feature makes it portable for daily usage.

Digital Hearing Aid using MKL02Z16VFG4 – [Link]

Tutorial on the Design & Implementation of an FPGA RGB LED Matrix Driver

In this episode Shahriar and Timo demonstrate the design methodology of an FPGA based 32×32 RGB LED matrix driver. Timo has kindly devoted some of his time to describe the block diagram and the thought process which goes into designing this type of FPGA display driver. The various components of the overall system (PLL, UART, and Display Controller) are shown along with the simulation data. The outputs of the Spartan-6 FPGA board are then measured using a Keysight S-Series oscilloscope. The design of the RGB matrix is also demonstrated using a custom clock interface sent wirelessly to the unit via Bluetooth.

Tutorial on the Design & Implementation of an FPGA RGB LED Matrix Driver – [Link]

DIY Weather Station with Bluetooth


by Matej Blagšič @ instructables.com:

Recently I attended a course in our University of Electrical Engineering and we were making ourselves a small weather station. It included learning about soldering, sensors and arduino. It was super fun making it with little kids and other high school kids my age. I will show you how you can build it yourself, what components do you need and explain you the code and how can you upgrade it with more sensors.

DIY Weather Station with Bluetooth – [Link]

Even a small figurine can play a big performance


New aerial from 2J will surely not surprise you by its size, however features of the antenna are worth noticing.

2JW035 antenna measures only 52,5mm and is intended for WiFi and Bluetooth devices in 2.4 a 5GHz bands. The gain is 5dBi and the VSWR value is below 2.6:1. A big advantage of this antenna is a possibility of its versatile placing, as it contains a hinge.
So as to suit various customers´ requirements, the producer offers a possibility to order this antenna with three various connectors:

  • 2JW035-C20Nb is equipped with hexagonal black SMA connector
  • 2JW035-C675 is equipped with a round SMA connector
  • 2JW035-C442, which is also our standard stock type is equipped with a round black reverse-polarity SMA connector (RP).

For special applications, there´s also a possibility to order this antenna in a custom specified colour.

Detailed information can be found in the 2JW035 datasheet.

Even a small figurine can play a big performance – [Link]

Smart Plug with Esp8266, Attiny 85 & PIR Sensor


by Armtronix:

The Wifi Arduino 85 is a small board with ESP8266 -01 module, Attiny85 micro controller and a relay. It Also has and additional header for connecting an external relay or to connect sensors like PIR, IR etc depending on your application. If you are a tinkerer you will also be able to connect a HC-05/06 Bluetooth module and convert this board to a Bluetooth Arduino 85 board.

Smart Plug with Esp8266, Attiny 85 & PIR Sensor – [Link]

Pozyx shield gives position


by elektormagazine.com:

Resolving the position of free roaming robots can be quite challenging. You can only expect to get accuracy of around 6 to 10 meters by using a standard low-cost GPS system and that can be further downgraded by poor signal strength inside buildings. Bluetooth and WiFi positioning can achieve 1 to 5 metres resolution but that’s often not enough. The Pozyx system has been developed to achieve a positional accuracy of 10 cm and works indoors or outdoors.

Four ‘Anchor’ transceiver units attach to walls or fences surrounding the space in which the Pozyx Shield operates. Communication between the shield and the four anchors allows the shield to determine its position and orientation within its operational area.

Pozyx shield gives position – [Link]

RFduino Compass


by RFduino @ instructables.com

The RFduino compass is a fully functional stand-alone compass which also transmits the current heading via Bluetooth low energy technology to phones, tablets, personal computers or any other equipped device. The RFduino compass is known as a Bluetooth Smart device.

RFduino Compass – [Link]

Simple Ham Radio Bluetooth Interface

Ham radio is a popular hobby and service in which a licensed amateur radio operator explores communications equipment. Typical ham radios do not have bluetooth support, which may be hassle for some. None of the transceiver manufacturers are providing a wireless interface. However, with this ham radio bluetooth interface, communicating and listening to other entity would be easier. The device uses Bluetooth module and a circular connector. The TE’s CeeLok FAS-T connector is one of the most rugged, small, 10 GB Ethernet, field terminable I/O connector. It has been designed to perform in some of the most extreme environments in the industry, while providing substantial size and weight savings via its small shell size 8-form factor.

The design is simple that anyone can construct it without having a hard time. The device uses a Bluetooth module, a regulator, connector and few passive components. It automatically connects to the PC or any bluetooth supported device when the application is started. Wireless headset would be very useful for ham radio operators so they can freely do whatever they need to do without being stagnant. In addition, a single blue LED indicates power and pairing.

Licensed amateur radio operators communicate with each other in nearby places, across the country, around the world or even with astronauts in outer space. Hams use a variety of frequencies for communications and may operate from just above the AM broadcast band to the microwave region, in the gigahertz range. This device may be useful for other applications such as aerospace, in flight entertainment and connectivity, defense and marine environments.

Simple Ham Radio Bluetooth Interface – [Link]

DragonBoard™ 410c – The Dragon Is Coming


Smaller than a standard playing card, the DragonBoard™ 410c packs a lot in a tiny footprint, including a quad-core 1.2Ghz Snapdragon 410 processor, 1GB RAM, 8GB eMMC storage, Wifi, GPS, and Bluetooth.

The DragonBoard™ 410c offers a fully integrated solution of hardware and software that is designed to erase technical limitations and offer unparalleled versatility for any project.

The DragonBoard™ 410c was designed to inspire the limitless possibilities of your imagination. Don’t be afraid to think big.

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DragonBoard™ 410c – The Dragon Is Coming – [Link]

LightBlue Bean – Zero wires. Infinite uses


The LightBlue Bean is a low energy Bluetooth Arduino microcontroller. Using Bluetooth 4.0, it is programmed wirelessly, runs on a coin cell battery, and is perfect for smartphone controlled projects.

SAN FRANCISCO and MINNEAPOLIS April 20, 2015 Punch Through Design, a hardware and software development firm making it easier to develop Bluetooth Low Energy products, announced that the company?s popular LightBlue Bean has been used to create the winning device at the Bluetooth World Hack Challenge.

LightBlue Bean – Zero wires. Infinite uses – [Link]