electronics News - Page 17 of 19 - CNX Software

September 6, 2016September 6, 2016 by Jean-Luc Aufranc (CNXSoft) - 5 Comments

UNI-T UT353 is a $15 Lightweight Sound Level Meter

Since some of the products I review come with a fan, I checked some sound level meters a couple of years ago, but since they were a little too expensive for my limited use, I skipped for the time being. However, while browsing some promotions or new arrivals on DealExtreme, I’ve come across UNI-T UT355 “Noise Detector Decibel Noise Tester” which sells for $15.56 including shipping. UNI-T UT353 mini sound meter specifications: Noise Levels & Accuracy – 30 to 130 dB with 0.1 dB resolution, +/- 1.5 dB accuracy Sample rate – Fast: 125ms; Slow: 1 second Measurement features – MAX/MIN, Data hold, overload indication (OL) Display – 1.64″ LCD display with backlight Buttons – Power, FAST/SLOW selection, MAX/MIN/normal selection, HOLD/BL for data hold (short press) or turning on/off the backlight (long press) Power Supply – 3x AAA batteries; 5 minutes auto power off Power Consumption – Active: < 40 […]

June 15, 2016June 15, 2016 by Jean-Luc Aufranc (CNXSoft) - 5 Comments

Aeroscope is a Bluetooth 4.1 Wireless Oscilloscope Probe Using your Android Tablet or iPad for Display (Crowdfunding)

Oscilloscopes used to be rather bulky equipment, but recent full featured oscilloscopes have come down in size, and even become portable and battery operated with products such as DSO Quad. But since many of us already own Android tablets or iPads, Aeroscope wireless oscilloscope probe is quite a neat solution as it transmits images of the waveform over Bluetooth 4.1 to your tablet. Aeroscope specifications: Analog Bandwidth – 100 MHz Sample Rate – 500 M samples/second Connectivity – Bluetooth 4.1 with 200-ft range Input Range – +/-40 V DC Accuracy – +/- 3% Offset Range – +/- 40V or +/- 20V offset for 20mV/div setting Sample Memory Depth – 10k Input Impedance – 10MΩ || 12pF Resolution – 20 mV/division to 10 V/division Battery – 950 mAh battery good for 4 to 8 hours of use depending on settings Activity sensor – (for extended use) Dimensions – 118 x 30 […]

May 28, 2016September 30, 2022 by Jean-Luc Aufranc (CNXSoft) - 11 Comments

ELLO 2M is a DIY Computer with a Keyboard, a 7″ Touchscreen Display and a Prototyping Area (Crowdfunding)

The traditional way to play with electronics is to get a board (e.g. Arduino), a breadboard to wire components & sensors to the board, and a computer for programming. ELLO 2M combines all that into a single piece of hardware with a 7″ touchscreen display, a Microchip PIC32 micro-controller board, a solderless prototyping area made of PGA sockets, and a keyboard. ELLO 2M hardware specifications: MCU – Microchip PIC32MX470 32-bit micro-controller @ 120 MHz with 128kB RAM (512kB RAM in the ELLO 2M “hacker” versions) Extra System Memory – Optional on-board serial non-volatile data RAM Storage – 3x micro-SD cards (one permanently built-in and two for removable storage); internal serial FRAM Display – 7″ LCD touch-screen panel with 800×480 pixel resolution Audio – Small speaker and buzzer Keyboard – Replaceable QWERTY keyboard Connectivity – 2.4GHz RF communication module with simple communication protocol Expansion – Expansion receptacle, electronic prototyping space with […]

May 13, 2016May 13, 2016 by Jean-Luc Aufranc (CNXSoft) - 16 Comments

The “One Dollar Board” Project Aims to Teach Electronics in Developing Countries (Crowdfunding)

I’ve already tried a one dollar board based on STM8s in the past, but it required a separate STLink debugger, installing a toolchain, and a few other steps. The “One Dollar Board” project, born in Brazil, has different objectives, as it aims to provide an easy way for pupils around the world to getting started with electronics, by simply connecting it to the USB port of a computer or board capable of running the Arduino IDE, and following the instructions printed on the board. One Dollar Board specifications: MCU – 8-bit MCU (likely Atmel AVR) with 8 KB flash 6x GPIO (input and output ports) USB – 1x USB port for power and programming Misc – 2x LEDs, reset button Expansion – Spaces for Wifi ESP8266, Atmel 24C256 serial EEPROM (256 KB), and L293 Driver motor (unclear where though) Power Supply – 5V via USB Dimensions – Compatible with Arduino […]

April 4, 2016April 4, 2016 by Jean-Luc Aufranc (CNXSoft) - 20 Comments

Tiny Microwave Radar Module Detects Movements Up to 9 Meters Away for $2

PIR sensors are used to detect motion for example to turn on or off a light bulb when motion is detection. One such sensor is HC-SR501 motion detector, which costs around $1, and is tiny (32 x 24 mm), but not quite thin due to the design that needs to capture infrared light, with an height of around 2 centimeters. If you’d like something almost as cheap, just as small, but much thinner, microwave radar modules could be a good alternative. XYC-WB-DC is one of those modules with the following specs: Operating Frequency – 5.8 GHz Detection angle – 360° Detection range – 6-9 meters Working Voltage – 3.3-20VDC; Standby current – <3mA; Transmit power – <2mW; Dimensions – 32 x 23 mm Operating temperature range – -20 ~ +80 Centigrade; Potential advantages over PIR sensors include wider detection angle, and lower power consumption, HC-SR501 datasheet reports respectively 120 degrees […]

March 30, 2016March 30, 2016 by Jean-Luc Aufranc (CNXSoft) - 1 Comment

DIGIO-128 Board Adds 128 GPIOs to Your Development Board

If you run out of GPIOs on your board, the easy way is to add an I2C GPIO expander, but those are normally limited to 8 or 16-channels, so Land Boards decided to create a board with 8 IO expanders making it a 128 channel IO expander that works on Raspberry Pi, BeagleBone Black, Arduino, and basically any boards with an I2C hardware or software implementation. DIGIO-128 board specifications: 8x Microchip MCP23017 16-bit I/O expander for up to 128 GPIOs Communication Interface – I2C host interface with 100/400 KHZ operation; 4-pin host interface connector (Ground, Power, Clock, Data) 8x 20-pin 2.54mm pitch connectors with 16 I/Os, 2x VCC, and 2 ground 2x 4-pin interrupt connectors Data Storage – Microchip 24LC024 2K EEPROM with board info. 3.3V or 5V operation Dimensions – 95 x 95 mm You can find out to use the board in the Wiki for code for Raspberry […]

February 19, 2016February 19, 2016 by Jean-Luc Aufranc (CNXSoft) - 6 Comments

$4 Wemos D1 mini ESP8266 Board Supports Shields with a Temperature Sensor, a Button, a Relay, or a micro SD slot

Wemos D1 board, a $9 ESP8266 board in Arduino UNO form factor, now has a little brother with Wemos D1 mini. The board looks somewhat similar to NodeMCU with breadboard friendly I/Os on the sides and a micro USB port for power and programming, but what could make it more interesting, beside the $4 price tag, is that the company also developed several shields (aka add-on boards). Wemos D1 mini specifications: WiFi 802.11 b/g/n module based on ESP8266EX with 4MB flash Expansion – Through holes with 11x digital input/output pins (3.3V) supporting interrupt/PWM/I2C/one-wire (except D0) 1x analog input (3.3V max input) Reset and power signals (5V, 3.3V, GND) USB – micro USB port Misc – Reset button Power – 5V via micro USB or 5V pin Dimensions – 34.2 x 25.6 mm Weight – 10 grams The board is said to be compatible with Arduino IDE and NodeMCU firmware. ESP8266 […]

October 5, 2015October 5, 2015 by Jean-Luc Aufranc (CNXSoft) - 4 Comments

ATT7039AU Micro-controller Features an Energy Meter Unit for Power Meters

About two years ago, I purchased Northwest T8 power meter, and it worked fine for about three months, but one day the top plastic broke as as unplugged it, rubber bands prolonged its life for a few more weeks, but eventually the display stopped working, and keep it in my drawer for long while, until today, when I decided to have a closer look at how it was done. The PCB is called CZ-7039-B2, and the top includes the display, 4 user buttons, as well as JTAG through holes (P2) and 2.54mm header (P1) with TDO, TMS, GND and 3.3V signals, as well as a pin called P1600, but I still haven’t found out what it might be for. I’ve also taken the board out completely, to find out everything is basically handled by a single 48-pin chip called ATT7039AU. After a Google search, I quickly found out the chip […]