Network Impedance Matching Calculator

Network Impedance Matching Calculator

由Network Impedance Matching Calculator.

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Energy Harvesting Wireless Sensor Modules, Receiver & Transceiver Modules and Accessories in 868 MHz | EnOcean – Products

Energy Harvesting Wireless Sensor Modules, Receiver & Transceiver Modules and Accessories in 868 MHz | EnOcean – Products

由Energy Harvesting Wireless Sensor Modules, Receiver & Transceiver Modules and Accessories in 868 MHz | EnOcean – Products.

 

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Energy Harvesting Wireless Technology for Home and Building Automation – EnOcean Alliance

 

由Energy Harvesting Wireless Technology for Home and Building Automation – EnOcean Alliance.

About Us

The Wireless Standard for Green and Sustainable Buildings

The EnOcean Alliance develops and promotes self-powered wireless monitoring and control systems for sustainable buildings by formalizing the interoperable wireless standard.

• Profile
  The wireless standard for sustainable buildings – No Wires. No Batteries. No Limits.
• Board of Directors
  Get to know Board of Directors of the EnOcean Alliance.
• Our Members
  Promoters, Paticipants and Associates of the EnOcean Alliance

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EE Times – 10 Projects Showcasing the Raspberry Pi\’s Versatility

由EE Times – 10 Projects Showcasing the Raspberry Pi\’s Versatility.

Slideshow

10 Projects Showcasing the Raspberry Pi’s Versatility

Caleb Kraft
7/26/2013 05:50 PM EDT
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The Raspberry Pi is showing up in all kinds of places. Last time we brought you 15 accessories for the Raspberry Pi, and now we’re going to show you some of the cool projects these things are being used for. Keep reading for examples of the Raspberry Pi in the kitchen, at the bank, in your phone, feeding your dog, giving brains to R2D2, and more!

 

 

Click on through to the next page to begin!

 

Raspberry Pi LED display board
Jeroen Domburg, known online as “Sprite," was given a very interesting piece of hardware to bring back to life: a dual-color 224×48 LED display board that had previously been used to display information for some kind of transportation system. In a rare occurrence, he was also given all the necessary power supplies and the industrial computer to drive it.

Right in the middle of Jeroen’s project documentation you’ll get a glimpse into the art of computer hacking. The computer boots up, gives him the hardware specs, then goes to a blank screen. His task was to find out how to get access to this computer and gain full control over the network in a few minutes using publicly available tools.

Once he had the display working like it was originally intended, he had to take it a step further. This is where the Raspberry Pi comes in. With its power, network access, and gpio pins, it was a perfect fit to drive the display. Jeroen loaded a linux distrubution and video client on the board and got the results you see above. Note that the flickering is due to the refresh rate of the screen and the refresh rate of the camera overlapping — it doesn’t have this issue with the naked eye.

Audio player remote embedded in a retro phone
Kees Van Weert had a really cool idea to use one of those retro phones that many of us have lying around as an interface for his audio system. He’s got a Raspberry Pi in there interpreting his commands and serving out the proper results. You can see in the video above that he can control playback and volume as well as change stations, all from the keypad.

You can see how he constructed the whole thing on his personal site.

 

 

Raspberry Pi bitcoin miner
Everyone puts their Raspberry Pi to work controlling various things, but what about having it earn money for you? In this tutorial, Collin Cunningham shares how to use a Raspberry Pi to “mine" bitcoins. If you’re unfamiliar, bitcoin is an open-source digital currency that has been making quite a bit of a stir lately, and “mining" is one way you can earn currency. Not only will this setup mine bitcoins for you, it will show you a real-time breakdown of the rate you are earning, the real-world currency exchange rate, as well as other diagnostics that will be very helpfull.

 

 

The Atari emulator
The small form factor of the Raspberry Pi allows for some unique cases. In this instance, it is being housed inside an Atari game console cartridge. Considering that this Raspberry Pi is acting as an Atari emulator, the shell is quite appropriate. Aside from that unique shell, this project goes a step further to make an entire portable gaming system out of the Atari itself. At first glance, it appears like a normal Atari, but when you lift the hinged top of the case, an LCD is revealed allowing you to play the games from the classic machine right there.

 

Raspberry Pi for automated gardens
Another interesting use of the Raspberry Pi might be to actually help grow raspberries. In this case, it happens to be growing tomatoes, but the concept is the same. The Raspberry Pi is tracking temperature, moisture, and lighting for this grow box. It makes adjustments as needed, including watering the tomatoes and controlling the lights. Results and stats are tracked and displayed via Flickr and Twitter.

 

Raspberry Pi-Powered Ultimate Microwave
The typical application for the Raspberry Pi around the kitchen is usually tweeting status updates of some sort. But Nathan Broadbent has gone so far beyond that, we wonder why his brainchild isn’t a commercial product. He has integrated a Raspberry Pi into his microwave and incorporated a long list of additional features. Just check out what this Raspberry Pi-controlled microwave offers, including:

• A re-designed touchpad
• Nicer sounds
• Automatic clock updates from the Internet
• Voice-command controls
• Can use a barcode scanner to look up cooking instructions from an online database
• The microwave has a webpage so you can control it from your phone (why not?), and set up cooking instructions for products
• Tweets after it’s finished cooking something

 

Note the part above where the microwave can read a barcode and consult a webpage. There was no webpage with a database of cooking instructions, so Nathan built that too.

The voice-controlled coffee machine from Sascha Wolter on Vimeo.

Making coffee with a phone call
The team at The Developer Garden, together with help from people at Oracle, made this fun little project. It is a coffee machine that is controlled via a phone call. As you can see in the video above, it is functional at least as far as a prototype. You could, in theory, give it a call on your way to work and have a nice, fresh cup waiting upon your arrival. Adding cream and sugar will be in the next system upgrade.

 

Raspberry Pi is a dog’s best friend
Dog may be man’s best friend, but in this case, Raspberry Pi is easily a dog’s best friend forever. Judd’s owner took on this project as a learning exercise as well as a chance to do a project centered around his dog. He’s using a Raspberry Pi to check an email address. When there’s a new message, the machine dispenses a treat and snaps a picture. Judd takes care of the rest.

The code and plans are available on the project page if you would like to make a new best friend for your dog. The new exercise program for your dog that will be required if email traffic is heavy is not included.

 

 

Raspberry Pi arcade table
Pong never looked this good! The tiny footprint and decent power of the Raspberry Pi makes it perfect for emulating classic arcade machines. Here we can see a nicely constructed coffee table arcade which would look good in any lounge or dorm room. Not only can this table support a variety of arcade games, but also it can browse the web using a wireless mouse and keyboard.

All the materials for this were low-cost, reused, or recycled. Considering that, the final product looks really great.

 

R2D2 brought back to life
What should an industrious engineer get for a girlfriend’s (or boyfriend’s) birthday? A fully functional R2D2 of course!

A Raspberry Pi was the last hope for this broken R2 unit. Luckily, that Raspberry Pi did a fantastic job of taking over operations. The new and improved brain of this R2 brings voice control, facial recognition, WiFi control, motion sensors, and ultrasonic distance detection. You can see it in action in the video above, as commands are issued that R2 follows.

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松翰 Sonix Technology Co., Ltd.

Sonix Technology Co., Ltd.

SN93300

Wireless multimedia processor

[放大圖]

 

Sonix SN93300 series is a 2.4GHz wireless multi-media processor that target on wireless transmission for video, audio and data applications. It supports at least 3 popular types of 2.4GHz RF transceiver, including Nordic® nRF24L01, AMICCOM® A7121, MuChip® MV400. Within bandwidth limit of 2Mbps, 3Mbps and 4Mbps data rate for each brand RF transceiver, SN93300 supports 1-way video, 2-way audio and 2-way data transmission. SN93300 implements most popular LCD panel interfaces and supports ISP CMOS sensor interface. For PC peripheral applications, it supports USB 1.1 interface and follow UVC/UAC driver-less class compliance of Microsoft® XP® SP2 or VISTA® OS.

 

 

Support 2.4GHz ISM band FSK RF transceivers. Firmware protocol base adaptive FHSS (frequency hopping spreading spectrum). Meet telecommunication regulations. FCC 15.247 CE ETSI EN 300 328-1 Built-in baseband supports antenna diversity for receiver. Built-in PLL for internal clock generation with input crystal frequency of 12MHz. Built-in wake up function for remote power-on/off control. Using external serial flash to store customized code and data. No external SDRAM needed. Path delay from Tx camera to Rx display has less than 0.1 second for video and audio. Remote command delay has less than 0.01 second. Packages of LQFP 48/80/100 USB 1.1 interface. USB Video Class 1.1 compliant. USB Audio Class 1.0 compliant. Support ISP CMOS sensor interface with 16-bit YUY2 format. 1/2, 1/4 image scaling function to keep fully view angle for small size panel. Support 1.5X or 2X digital zoom-in function for VGA sensor. For VGA sensor, combined scaling and windowing function provides similar view angle for QVGA/QQVGA output format. Built-in JPEG codec. Built-in TV encoder. Support image DSP technology to eliminate blocking effect. Support digital microphone interface to eliminate MIC interference by RF antenna. Support snapshot function and store images in serial flash. Preview snapshot by LCD panel PC software via USB download Receiver image frame rate Max. 30 frame/sec @ QQVGA Max. 30 frame/sec @ QVGA Max. 15 frame/sec @ VGA Support OSD (On Screen Display). Maximum 128 characters. Each character has 16×16 or 8×8 dot matrix option. Each character has 4 colors, 1 background color and transparency option. Support panel types: TFT/CSTN/LTPS Video output interfaces: UPS051 RGB Dummy 8080 IF (CPU IF) Parallel RGB (8 bit x 3) YUV422 (Sensor IF) BT601 (output h-sync, v-sync, 8/16 bit data, 13.5MHz clock) BT656 (output 8 bit data, 27MHz clock) CVBS Video input interfaces: YUV422 (Sensor IF) BT656 Built-in 4 of 10 bit, 8K/16K sampling rate ADC for microphone, AD key, battery detection and general purpose analog input. Built-in 10 bit, 8K/16K sampling rate DAC for analog audio output. Support GPIO and PWM pin for local or remote control. PWM pins support stepper motor control. Each GPIO has wakeup capability. Support multiple ID for security. System current assumption: Camera-site : 100mA~200mA (RF+PA+SN93300+Sensor) Monitor-site : 100mA~200mA (RF+PA+SN93300+Panel)

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聯陽半導體 ITE Tech. Inc.

ITE Tech. Inc.

IT9500: ccHDtv Transmitter

 

IT9500 is a series of highly integrated transmitter for ccHDtv camera, and other personal, community, or professional digital TV head-end applications. The core of IT9500 is a DVB-T COFDM modulator. The high level of integration of IT9500 significantly decreases the power consumption, board size and cost of modulators in digital TV transmitter. With IT9500, a low cost, low power, compact, reliable, high bandwidth and wireless (or wired) full HD delivery solution is easily achieved. IT9500 offers very low total bill of materials (BOM) solutions. It includes processing units for forward error correction coding and digital modulation, D/A IQ converter, low-pass filters, and local oscillator for the external mixer. IT9500 series also supports flexible input interfaces, including embedded USB 2.0 interface, and serial/parallel TS interface input/output with built-in de-multiplexer. IT9500 series is compliant to the non-hierarchical transmission specified in DVB-T (ETSI EN 300 744). A (204,188) Reed-Solomon encoder capable of correcting 8 error bytes is used to generate parity bytes for each input TS packet. The code rates of the punctured convolution encoder include 1/2, 2/3, 3/4, 5/6, and 7/8. Only native interleaving is used in IT9500. The output signal bandwidth is configurable from 2 MHz to 8 MHz. The supported signal constellations include QPSK, 16-QAM, and 64-QAM. FFT modes of 2k and 8k and guard intervals of 1/4, 1/8, 1/16, and 1/32 specified in EN 300 744 are supported. The transmission parameters are register-programmable, and are embedded in the Transmission Parameter Signaling (TPS) information as required by EN 300 744. A complete set of application programming interface (API) is available, facilitating fast and easy integration into products on Windows Mobile, Windows CE, Windows 8, Windows 7, Windows XP, Vista, Linux, and many other operating systems.Furthermore, a complete set of USB drivers for Windows 8/7/XP/Vista, Windows Mobile/CE, and Linux are providedfor IT9500.

http://www.ite.com.tw/TW/products_kind.aspx?CategoryID=2

nModulator nETSI, DVB-T/H (EN 300 744 V1.5.1) Compliant baseband transmitter for Digital Terrestrial Television nConfigurable code rate: 1/2,2/3,3/4,5/6,7/8 nProgrammable QPSK, 16-QAM and 64-QAM Symbol Mapping nConfigurable support for 2k and 8k FFT nProgrammable Guard Interval (1/4, 1/8, 1/16, 1/32) nSupports variable channel band width from 2 MHz to 8 MHz nZero I/F complex base band I/Q output with integrated DAC and anti-aliasing filter nMER > 40dB nCarrier Suppression > 50dB nSpectrum Shoulders: 55 dB for perfect adjacent-channel operations

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ccHDtv – 解決方案 – DTV CAM

ccHDtv – 解決方案 – DTV CAM

Full HD DTV CAM

Features for DTV CAM

• Versatile Medium
  • Air (wireless)
  • Coaxial Cable
  • Twisted Cable
  • Parallel / Twin lead / Ladder Cable
• Deliver Full HD 1920x60p video and audio
• Long Distance, RG-6 up to 500M+, w/o repeater
• A single cable for
  • Transmit 100+ Cam’s HD 1920X11080X60P Video / Audio
  • AC / DC Power on cable (POC) design
  • Full duplex PTZ command control
  • Full duplex audio support
  • CVBS video for backward compatible DVR
• Low cost transceivers
• Well approved and mature transmission protocol
  • Cost-effective peripheral components, test equipment, debug tools
• Ultra Low Transmission Latency, 2ms

 

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台灣安全監控新的傳輸規格ccHDtv (HDCCTV 和 ccHDtv 傻傻分不清楚!! )

台灣安全監控新的傳輸規格ccHDtv (HDCCTV 和 ccHDtv 傻傻分不清楚!! ).

ccHDtv  就是將 數位電視DVB-T 的技術 用到安全監控這裡….
DVB-T 他是有一個規範所約束的。縱使一條同軸電纜 他的可以時傳送多台頻道,但每一個頻道有一個頻寬的極大值。目前極大值是  32M bit/sec

也就是說,有這個上限,所以在傳輸高解析度的影像時候，前端攝影機一定要壓縮…
不可以直接傳送raw data..

一般的電視都有附送數位電視機上盒,就可以直接收看影像,
但如果要同時看若干路的影像, 那麼就要去裝若干路的 Tuner….
比如說好了,如果我有看一路的影像,我就直接用電視的數位電視接收盒就可以看到,
但如果我要同時看四路，就要有四組數位電視接收盒,
因此,ccHDtv 的整個Roadmap 也會有類似  4ch video decoder 一樣, 會出一顆 4ch 的Tuner

和HDCCTV  一樣, 他也是要有 TX 和RX , 一樣是走同軸電纜, 同軸電纜用兩光的就可以了
具體數據如下:
3C2V: 500公尺(M) RG59: 500公尺(M) RG6: 900公尺(M)
CAT5/CAT6: 275公尺(M)
再來談談時間延遲( Time latency),
HDCCTV 和 cctv 都是real time.
ccHDTV 和ip camera 都會有latency.
只是 ccHDTV  的latency 是可以預測的, 一旦選定某種傳輸格式,
Latency 是固定的, 不會隨機變動
IP CAMERA 傳輸延遲, 在網路上是無法預估的, 點對點可能只有幾 ms, 但在較大網路就可能到 數百ms, 或 second  等級 而且是不可以預測的，隨機變動的

以下簡單的比較一下各種傳輸方式

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夢想天空: 穴道按摩功能與圖解-健康你的人生 – yam天空部落

夢想天空: 穴道按摩功能與圖解-健康你的人生 – yam天空部落

由夢想天空: 穴道按摩功能與圖解-健康你的人生 – yam天空部落.

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辨別積分球的好壞 !

如何判別積分球好壞? 要判別積分球的好壞之前,先讓我們介紹一下積分球的工作原理:
積分球之基本工作原理如圖一所示；光線由輸入孔入射後，光線在此球內部被均勻的反射及漫射，因此輸出孔所得到的光線為相當均勻之漫射光束。而且入射光之入射角度、空間分布、及極化皆不會對輸出之光束強度及均勻度造成影響。您可以想像當光線射入積分球後，將在球內完全混光，最後均勻的分布在積分球內部表面。因此不管您將出光口開於何處理論上您看到的光線強度及顏色都要相同；或者換個方式來說同一束光線，不管您以任何角度進入積分球，只要能確定所有光線都有進入球內部，那您在出光口所觀察到的光線強度及顏色都要相同!

圖一： 積分球之工作原理如何能使積分球接近理想的狀況? 要使積分球能夠達到上述的理想工作狀況須有幾個因素;首先反射率需夠高，反射率高，才能夠讓光線在球內漫射的次數提高，光線才能在球內部均勻的分布；其次則是積分球的結構設計最好是讓光線在射出出光口之前能經過越多次反射越好，儘量不要讓光線經過一兩次漫射後就進到出光口!! 如何檢驗積分球的優劣? 已經了解理想的積分球工作狀況；那麼對一般使用者而言，最簡易的評估方式為何呢? 就是將待測光源 (如LED) 不論置於積分球內之任 Input Port Output Port Light Ports Inc.  何地方，測試出來之結果皆應相同。因此您可以試著將LED 置於積分球內，並朝不同的方向來進行測試，甚至將待測物置於球壁及球中心進行測試；若您得到非常一致性之結果,恭喜您,您所使的的積分球均勻性非常好!! 我們的積分球採用特殊之設計, 讓您只要遵守我們建議之量測方式, 便可得到非常一致性之結果!! 以下為我們的積分球, 搭配我們的量測系統所進行之均勻性實驗; 對於同一顆LED, 我們置於兩個不同位置, 分別測試其結果。
位置一:

將LED 置於專用治具上, 由積分球之球壁來量測。
位置二:
 將LED 置於積分球內之測試平台上 (平台可拆卸), 執行自吸收補償後進行量測。

測試結果:

 兩者之結果亮度差異約為1%, 光功率差異約為2%, 色座標幾乎沒有差異!
http://www.lightports.com/led_c.htm



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