If you’re old enough (or have followed the US 2012 presidential race), you must know an Etch a Sketch is a drawing board that you can erase by shaking it. The Boogie Board LCD eWriter has basically the same functionality, but instead of using aluminum powder, it’s using a Reflex LCD display and a stylus, and instead of shaking it to erase content, you’ll just press a button. Like E-Ink, reflex LCD displays do not use power when content remains unchanged. The first version was released in 2010, and appears to be relatively easy to find in the US (online retailers, Wallmart…), but not so in the rest of the world. There are 5 versions of the Boogie Board, but the last 2 that will only be available for Xmas 2013: Original 8.5 – 8.6″ display, external adhesive magnets Original 10.5 – 10.5″ display, replaceable batteries Jot 8.5 – 8.6″ […]
EZCast Is a Wi-Fi Display Solution (Miracast, DLNA, etc..) to be Used With Actions Micro HDMI TV Dongles
This morning I’ve come across an interesting video via Google+ (in Chinese) that showcases the features of EZCast, an application that can be installed on Android or iOS, and supports screen mirroring, DLNA, and Miracast with HDMI TV Dongles designed by Actions Micro. The company is not to be confused with Actions Semi The company is a subsidiary of Actions Semi, an IC company that provides ATV6003 SoC used in HDMI TV Dongles such as iPush. If you’ve watched the video above, beside DLNA and Miracast, you’ve found out it can also be a nice presentation tools, allowing for PowerPoint slideshows, and notes writing via your smartphone. After further research, I found the application has recently been published on both Apple App Store and Google Play. The App description is only available in Chinese, but here’s the (unedited) Google Translation of the description: EZCast is a powerful home media sharing […]
How to Buy an Arduino Leonardo (Clone) Kit for Less than $20
Borderless Electronics Indiegogo campaign for their $9 electronics kit with an Arduino Leonardo clone went so well that the owner of the campaign decided to limit the total number of boards to 15,000, and basically stop the campaign early to avoid production delays. For $12 ($9 + shipping), you could get a full kit with: Arduino Leonardo clone A mini breadboard with 10 Jumper wires A plug for a 9V battery A few components: 6 LEDs, 10x 330 Ohm resistors, 10x 1 KOhm resistors, 3x push buttons, 2 NPN transistors, 5 diodes, a light sensor, and a sound buzzer A micro USB to USB cable Although they may start a new one campaign in a few months, the campaign is over, and you can’t get this cheap Arduino kit anymore. But one of my reader (onebir) let me know that for less than $20, you can get an Arduino Leonardo […]
Lantronix Unveils xPico Wi-Fi Module For the Internet of Things
With Texas Instruments SimpleLink Wi-Fi CC3000 and Qualcomm Atheros AR4100P embedded Wi-Fi processors that fully handle Wi-Fi internally, and transfer data to an MCU with an SPI interface, and solutions such as Electric Imp, there are already ways to add Wi-Fi at relatively low cost to appliances. There’s now another solution available on the market with Lantronix xPico Wi-Fi Module. Listed features and specification of xPico Wi-Fi: SoC – ARM Cortex M3 class processor with 1MB on-chip Flash and 128 KB SRAM Storage – SPI Flash storage Wireless LAN Interface IEEE 802.11 b/g and IEEE 802.11n (single stream) WLAN interface (2.4 GHz only) IEEE 802.11 d/h/i/j/k/w/r WPS 2.0 support u.FL connector for external antenna Serial Interface Two Serial CMOS Ports (3.3V, 5V tolerant) 300 to 921.6 Kbps Flow control XON/XOFF, RTS/CTS (SPort 1 only) Lantronix tunneling application (SPort 1 only) Host Interface – Dual Serial Port, SPI, USB 2.0 (device), […]
CheapCast Chromecast Emulator for Android (Beta) is Available for Download
Yesterday, I wrote developers were working on making any media App and any Android device compatible with Chromecast. Sebastian Mauer has taken care of the latter, by publishing CheapCast (Beta) in Google Play. Several people have been trying it successfully, including in iMito MX1 mini PC. I’ve been less lucky. I’ve tried it by running YouTube App in Zopo ZP900S smartphone (Android 4.0.4) with 4 devices: Tronsmart T428 – “Works” but the video won’t start playing. (Bug reported in Github’s issue tracker) [Update: It now works with the latest version in Google Play]. MK908 – Refused to install anything in Google Play today… (Older Android 4.1 firmware) Wandboard Quad – “Works” but the video won’t start playing. CX-01 – CheapCast will crash when playing video I can’t really play YouTube videos over 360p without buffering here, so the reason the video won’t start in T428 or Wandboard Quad might be […]
$275 HackRF Open Source Software Defined Radio (SDR) Platform
HackRF is an open source hardware project to build a Software Defined Radio (SDR) supporting a frequency range between 30 MHz and 6GHz in both directions (Tx and Rx, half-duplex) with a maximum bandwidth of 20MHz. Jawbreaker (shown below) is a beta hardware that has been tested by several developers and beta testers, and applications such as Digital Audio Broadcasting (DAB), Bluetooth monitoring, spectrum sensing, wireless microphones, AIS, FM radio, etc.. have already been ported to the platform. In order to lower the cost of the hardware, Michael Ossmann has launched a Kickstarter campaign to fund mass production. There seems to be many SDR enthusiasts as the campaign has already reached its funding target ($80,000) and received for over $300,000 in ledges. What is Software Defined Radio (SDR) and What Can it Be Used for? Before providing details about the hardware and software, it may be useful to provide some […]
Fritzing Open Source Software Designs PCB Layouts from Breadboard Drawings
Earlier this year, I’ve tried Gumstix Geppetto, a web-based application that let you easily design and order boards. You can just add some building blocks in Chrome browser, connect them, and you’re ready to order a PCB. However, the setup fee of $1999 reserves it to businesses. Don’t worry If you’re just a hobbyist as Fritzing, an open source software supporting Windows, MacOS and Linux, allows you to draw breadboard connections, and automatically route the schematics, and the PCB layout. You can then export the gerber files, or order directly from Fritzing Lab. The software is not exactly new, but it’s the first time I’ve come across it. I’m using Ubuntu 12.04 64-bit, so let’s download, install and run the corresponding version:
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wget http://fritzing.org/download0.8.3b/linux-64bit/fritzing-0.8.3b.linux.AMD64.tar.bz2 tar xvf fritzing-0.8.3b.linux.AMD64.tar.bz2 cd fritzing-0.8.3b.linux.AMD64/ ./Fritzing |
I’ve decided to connect an LED on the breadboard, and control it with an Arduino Leonardo board to try the software. Alternatively, you could also play around […]
MK908 Rockchip RK3188 mini PC Android 4.2.2 SDK Leaked
We’ve had the Linux source code for RK3188 for a little while, which allowed a preliminary Ubuntu image to boot on devices such as Tronsmart T428. But AFAIK, we did not have any Android SDK for RK3188 HDMI TV Stick, until now. A new user on ARMTvTech has uploaded 5 rar files that can be decompressed into a single 3.2GB file called mk908_RK3188_R-BOX_ANDROID4.2.2-SDK.tar.gz. I’ve had a look, and this is the content of the file which appears to be a complete Android 4.2.2 SDK for MK908. There’s 2 documents in Chinese: mk908_checklist.doc – Apparently some instructions, or recommendations specific to Android MK908_checklist_kernel.docx – Some details about the kernel config There are also more documents and directories in RKTools/docs, but I haven’t checked the details:
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ls android分区修改说明.pdf Camera_for_RockChipSDK参考说明_v4.0.pdf Infrared remote control R-Box Platform User Manual_V0.9.pdf RK29OR30_ota.pdf RKeMMCSupportList Ver1.09_2013_4_15.pdf RKNandFlashSupportList Ver2.61_2013_4_15.pdf RKRemoteControl RK USB Application Note_V2.0.pdf ROBX-SDK 发布说明(RK3188_R-BOX_ANDROID4.2.2-SDK_V1.0.0_130514).pdf Rockchip Parameter File Format Ver1.3.pdf SDK 发布通知.pdf wifidisplay |
Back to the root directory, we’ve got a Makefile, and mkimage.sh script, but both are called by 3188.sh script which apparently builds all, and generates […]