Home Blog  

12 Nov 2014


Vincent informs us of this Arduino compatible CT-UNO, the Cytron version of Arduino UNO:

The CT-UNO combines the simplicity of the UNO’s Optiboot bootloader (which load program faster), the stability of the FTDI and the R3 shield compatibility of the latest Arduino UNO R3. Besides, we know many are using Android phone which comes with USB micro-B cable (power bank also require micro-B to charge), therefore, to lower down the cost needed for customer to get started, we populate the USB micro-B socket for USB connection! Program can be loaded from Arduino UNO by utilizing your Android phone USB cable. Select “Arduino UNO” from the board and choose the correct COM port, you are ready to upload the code.
CT-UNO has all the amazing features Arduino UNO offer. 14 Digital I/O pins with 6 PWM pins, 6 Analog inputs, UART, SPI, external interrupts, not to forget the I2C too.


Introducing CT-UNO, Cytron version of Arduino UNO - [Link]

11 Nov 2014


Morse code is used in telecommunication; it is a method of transmitting and receiving coded information. Each character (letter or numeral) is coded/represented by a unique sequence of dots and dashes. Compared to voice, Morse code is less sensitive to poor signal conditions, yet still comprehensible to humans without a decoding device, therefore, a useful alternative to synthesized speech for sending automated data to skilled listeners (radio operator) on a voice channel.

The project’s first part is composed of an electret microphone followed by a common emitter follower amplifier; this transistor amplifier also acts as a first level bandpass filter. Its band edges are determined by the size of the coupling capacitors, and the feedback capacitor between the transistor’s base and collector terminals. The next part of the project is the PLL (phase lock loop) tone detector/decoder NE567; its output is a one-zero pattern replicating the dots-and-dashes sequence of the received signal. This output drives both an input to the PIC16F84 microcontroller and an LED that is used as a receiver tuning aid.

Another part is the PIC16F84 microcontroller, its function is to measure the duration of the one-zero input string from the tone decoder, and translate the pattern into DOTs, DASHs, symbol spaces, character spaces, or word spaces. Each of the symbols that are received, an equivalent “code word” is assembled and is convert to its ASCII equivalent character for display. And for the final part, the CPU interfaces to the LCD line display, sending ASCII characters to it and monitoring LCD status.

Morse Code Decoder – [Link]

11 Nov 2014

by edn.com:

The Raspberry Pi Foundation has unveiled the Raspberry Pi A+ – a smaller version of its original Model A – that costs only $20. The Model A+ is significantly smaller than the Model A (65 mm in length versus 86 mm), consumes less power, uses the BCM2835 application processor, and has 256 MB RAM.

$20 Raspberry Pi Model A+ is smaller, uses less power - [Link]

11 Nov 2014


by sparkyswidgets.com:

MinieC eC interface is a very cost effective solution for adding eC sensing capability to any project. This unit takes the analog complexity out of measuring the conductivity of a solution.

MinieC I2C eC interface - [Link]

10 Nov 2014


An app note(PDF) on smart on/off controller and voltage monitoring chip from STMicroelectronics.

These devices allow easy and safe control of applications run with one or two push-buttons by securely starting or powering down a system and also resetting the processor or disabling power in case of a non-responding application (e.g. code in a dead loop). This makes the STM660x devices suitable for a broad spectrum of applications such as terminals, audio and video players, smartphones, PDAs, PCs, or any portable device.


Using the STM6600, STM6601 smart push-button on/off controller - [Link]

10 Nov 2014


New „hardwired“ TCP/IP chip from company Wiznet resists attacks, it´s fast and consumes only a minimum energy and host MCU resources.

TCP/IP solutions from company Wiznet are known by its resistance resulting already from their principle . all the solution is hardware-based, thus it´s not possible to change a basic functionality of a device (flooding, spoofing, …). W5500 outstands by its “modesty” – it only requires a few GPIO pins of a host MCU – thanks to a high speed SPI interface (up to 80 MHz) and it also has a very low power consumption. A result of a small consumption is, that the chip heats up to approx. 40´C at a common operation, in contrast to other similar chips, which usually have 60-70´C at operation. This naturally means a higher reliability, possibility of a more dense placing of components and elimination of problems with overheating of a device built-in into a small enclosure.

Energy saving is also enhanced by Power Down and Wake-on-LAN (over UDP) modes. Single 3,3V are enough for power supply, while inputs are 5V tolerant. Status is indicated on LED outputs (full/half duplex, link speed, active) and the chip contains a built-in OS Linux (kernel 2.4.xx, 2.6.xx, 3.1,xx) & RTOS driver.

In our offer can be found the W5500 chip itself W5500-EVB evaluation board, as well as a ready-made module WIZ550S2E-TTL or WIZ550io. Examples of a real usage of Wiznet chips can be found in the document Wiznet application reference.

W5500 will resist hackers attack and save energy - [Link]

10 Nov 2014


by Ashok Bindra @ digikey.com:

As electronic products get smaller and better, so must the converters powering them. Besides delivering higher efficiency from a smaller footprint, these DC/DC converters must also respond rapidly to varying loads while making the system designers’ jobs simpler. Consequently, power supply makers continue to tap the benefits of advances in packaging, architecture, and semiconductor processes to further push the performance of integrated DC/DC modules in ever-shrinking packages.

Improved Packaging and Control Generates Ultra-Fast DC/DC Converter - [Link]

10 Nov 2014


by MrLeeh @ instructables.com:

I wanted to have my personal, nice looking Mediabox with a big display and remote control. I’ ve been playing around with the Raspberry for a while so I decided this would be the platform of choice for this project. I’ m actually a fan of Steampunk so I decided to use a Steampunkish style for the box.

Raspberry Mediabox Steampunk style - [Link]

10 Nov 2014


by Sam Freeman and Wynter Woods @ makezine.com:

This simple hack turns your Raspberry Pi into a powerful FM transmitter! It has enough range to cover your home, DIY drive-in movie, a high school ball game, or even a bike parade (depending on the stragglers).

PiFM software not only boldly enhances the capability of your Pi, but does so with nothing more than a single length of wire. This hack starts with the absolute minimum you need to run a Raspberry Pi — an SD card, a power source, and the board itself — and adds one piece of wire. It’s the coolest Pi device we’ve ever seen with so few materials.

Raspberry Pirate Radio - [Link]

10 Nov 2014


RaysHobby build a project called RFToy:

it’s an Arduino-compatible microcontroller board for interfacing with radio frequency (RF) modules, such as the popular 433/315MHz transmitter/receiver, and the nRF24L01 transceiver. The RFToy has a built-in ATmega328, USB-serial converter (CH340G), 128×64 OLED display, three buttons, and a coin battery holder. Programming is done in Arduino through the on-board mini-USB port. It has three sets of pin headers to directly fit RF modules, and an audio jack to output RF receiver signals to a computer’s sound card. Using RFToy you can build a variety of projects involving RF modules, such as remote control and wireless sensors.


Introducing RFToy, an Arduino-compatible gadget for radio frequency modules - [Link]





Search Site | Advertising | Contact Us
Elektrotekno.com | Free Schematics Search Engine | Electronic Kits