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Free tables available for embedded open source showcase
COM Express module takes the heat
Panel PC has antimicrobial case
MIPS-based networking processor gains Linux support
ATCA blade cranks it up with six-core Xeon
มูลค่าแอพฯมือถือทะลุ $17.5B ในปี 2012
Open Source Washing Machine Project
แอปเปิลแบนฟิล์มกันรอยในร้านค้าของตัวเอง
ARM cortex-M3 prototyping on a budget
NGX Technologies sent us this Blueboard LPC1768-H to play with. It’s basically a breakout board for an NXP LPC1768 ARM cortex-M3 microcontroller (datasheet). The board adds a few extra goodies, such as a choice of mini-USB connector or barrel-jack to provide regulated power to the chip. There’s also a clock crystal for the internal RTC and an Atmel 256kb EEPROM chip. This chip has 70 I/O ports, accessed through the pin headers on top and bottom of the board. The 20-pin header to the left is for a JTAG programmer (yes, you’ll need a separate programmer). Coming in at only $32.78 this is a very accessible route for projects that require more power than some of the traditional hobby controllers. The shipping seems to have come down since NGX’s last offering, now it would be under $10 to ship to the States.
The LPC1768 is the same controller from the mbed that we reviewed. What’s missing is some of the interface hardware and the boot-loader, but the tradeoff comes with a $66 savings. This is to mbed what an AVR board is to the Arduino, a way to get even closer to the hardware.
There are a few things we think are missing. Most notably, there isn’t a datasheet or user guide for the board itself. The only information available is a schematic (PDF), but that should be enough for those already well versed in working with microcontrollers. There is also a 12MHz clock crystal on the board but it doesn’t seem to be jumpered in case you wanted to use a different frequency. We’re not sure if this is much of an issue, the internal RC oscillators offer a lot of flexibility including operation up to 100MHz.
We feel this is a solid platform that will help to get more people into ARM development because of its low price. Let us know your thoughts in the comments.
Arduino balloon tracking
The Ferret is a high-altitude balloon tracking hardware package. Created by [Adam Greig] and [Jon Sowman], it uses an Arduino to gather NMEA data from a GPS unit, format the data into a string, and transmit that string on narrow-band FM. The project, built in one afternoon, is a tribute to the prototyping simplicity the Arduino provides.
The unit was powered by four AA batteries, using the Arduino’s on board voltage regulator. This provided a bit of heat which helps in the frigid reaches of the upper atmosphere. The bundle above was put in a project box and attached to the outside of the balloon’s payload, then covered with foam for warmth and moisture resistance. This tracking is a lot less complicated than some of the photography setups we’ve seen for balloons. It’s also more versatile because it broadcasts the GPS data so that many people can track it, rather than just logging its location.
Kohjinsha เปิดตัวเน็ตบุ๊คจอสัมผัสพลังหมี Rilakkuma!
Simple dot matrix clock with Arduino
This dot matrix is a great project for Arduino and dot matrix display newbie’s. Fun part is that this project doesn’t use a regular Arduino board, but instead it is assembled on a breadboard with ATmega168 with Arduino bootloader. Project uses a temperature compensated RTC clock with internal crystal chip DS3232 that gives great accuracy (±2ppm in normal conditions).
Clock is as it is without ability to set time – so there is place for improvement and design. This clock can be powered by two 10F 2.5V super caps that allow RTC clock running for several days.
กระทู้ล่าสุดที่มีคนตอบ
Freeduino board

แผ่นปริ้นท์ freeduinomax232ss เกรด A ราคา 100 บาท
ชุดคิท freeduinomax232ssAtmega168 ราคา 320 บาท
ชุดลงปริ้นท์ freeduinomax232ssAtmega168 ราคา 450 บาท
สาย RS232 ราคา 70 บาท DC อะแดปเตอร์ 9 volt ราคา 120 บาท
ค่าส่ง EMS 60 บาท
การใช้งานชุด freeduinomax232ss จะต้องประกอบด้วย ตัวบอร์ด, สาย RS232, อะแดปเตอร์ 9 โวลท์ชนิดที่มีขั้วบวกอยู่ตรงกลาง
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