tag 标签: pi

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  • 热度 9
    2023-8-12 11:48
    2255 次阅读|
    2 个评论
    DesignCon是一个年度的技术会议,专注于高速通信和电子设计领域。 该会议旨在为电子工程师、系统设计师、IC设计师、测试和测量工程师等专业人士提供一个交流和学习的平台。DesignCon是世界一流的高速通信和系统设计大会,个人觉得这是学习高速电路设计非常好的平台,提供的文章质量也非常高,是硬件及相关行业的工程师不可多得的学习资料。建议下载深入学习 DesignCon聚集了来自全球各地的行业专家和领导者,他们分享最新的技术趋势、挑战和解决方案。会议涵盖了广泛的主题,包括高速信号完整性、高速串行链接、射频和微波设计、电源完整性、信号完整性、电磁兼容性、电源管理、测试和测量等。 在DesignCon上,与会者可以通过参加技术演讲、研讨会、实验室教程和展览等活动,了解最新的设计技术、工具和产品。此外,与会者还可以与同行交流、建立业务联系,并参与各种专业讨论和解决方案。 DesignCon的目标是促进行业创新和技术进步,帮助设计工程师和相关专业人士在高速通信和电子设计领域取得成功。通过提供一个全面的平台,DesignCon为与会者提供了深入了解行业趋势、学习最佳实践和解决方案的机会。 DesignCon是一个年度的技术会议,专注于高速通信和电子设计领域。它提供了一个平台,让工程师、设计师和研究人员可以分享他们在电子设计中的最新发现和创新。 DesignCon的主题涵盖了 信号完整性、高速通信、电源完整性、射频和微波设计、电磁兼容性、嵌入式系统设计 等等。会议通常包括技术演讲、研讨会、展览和论坛等。 关于DesignCon的更多信息和链接,可以访问以下网站: 官方网站: https://designcon.com/ DesignCon论坛: https://designcon.com/technical-program/technical-forums 设计Con(DesignCon)是一个专注于高速电路和信号完整性领域的会议和展览,关注高速电路设计、信号完整性、射频(RF)设计等方面的技术和最佳实践。以下是下载链接: 历年 DesignCon下载链接分享: 链接: https://pan.baidu.com/s/1BJIouvWeh4YlCNoNuWdtCA?pwd=qxcc 提取码:qxcc 持续更新中。。。。。
  • 热度 18
    2016-1-22 18:25
    1622 次阅读|
    0 个评论
    One of the artifacts I've long been planning on featuring in my Caveman Diorama is an H.G. Wells-esque Time Machine (see also Caveman Floodlights ).   Over the past few months, I've spent a lot of time trying to work out how to create this model. In fact, I recently invested is a set of 36" x 24" prints of Chris Perrotta's Time Machine drawings, which represent a dimensionally accurate version of the M.G.M. movie prop as it existed in George Pal's 1960 movie, The Time Machine . (You can obtain these drawings by Clicking Here , selecting the "Products" link, and then selecting the "Drawings" option.)   Sad to relate, the aforementioned drawings -- which (it has to be said) are very, very tasty -- may simply end up being framed and hung on my office wall. This is because a reader, Fmotta, recently pointed me at this 3D model of the Time Machine on the TurboSquid.com website.   OMG, this is soooo cool, but now that I see this little beauty in all its glory, I realize that it's going to be a bit of a bugger something of a little rapscallion to fabricate. Remember that I'm working at 1/32 scale, so a 6' tall man would be 2.25" tall in my diorama. Thus, guestimating the machine as being around 8' long by 3' wide in the real world translates to 3" x 1.125" in our diorama universe.   I was talking to my chum Adam Carlson about this yesterday. As you may recall, Adam is something of an enigma -- an aerospace engineer who makes model submarines and a mechanical engineer who designs electronic systems. Adam is an expert at 3D modelling and 3D printing, and we agreed that -- if I do opt for the full-up H.G. Wells Time Machine -- then there's a heck of a lot of detail that has to be squeezed into a very small model.   Hmmm, I think I'm going to have to go back to the drawing board on this one. My first thought was to create my own interpretation of the Time Machine. I had always planned on making my version a two- or three-seater anyway, thereby explaining my wife's presence in the diorama (although I don’t know what she's going to say when she finds herself dressed like Raquel Welch in the movie One Million Years BC ).   One idea that would be much simpler to construct would be to have a larger, more cylindrical engine mounted vertically, and to have three chairs presented around the engine at 120° to each other as illustrated below (I'm sorry about the blurry quality to this image -- I'm afraid it met a cup of coffee on the way to the scanner):   (Source: Max Maxfield / EE Times)   In addition to being easier to create, this version provides a lot of space to store cargo between the chairs. We could keep the wooden plinth at the bottom, and we could also mount an H.G.Wells-type umbrella-disk on the top of the engine if we wished.   One downside to this approach is the final machine would be quite large. If the plinth were 10' in diameter, this would equate to 3.75" in our diorama, which is a lot bigger than you might expect (it's almost as wide as the pool in the cave.   While I was ruminating on this, I had what I consider to be a brainwave (I can’t help myself)-- as opposed to a Time Machine, what about having a Time Portal (think Stargate )? One solution would be to have this portal mounted directly on the floor as illustrated below:   (Source: Max Maxfield / EE Times)   The great thing about the portal concept is that it can be made to be visually impressive while consuming relatively little of the cave's real estate.   Another possibility would be to make the portal appear to float in the air. This could be achieved by having some rocks positioned a little way behind the portal with a hidden support as illustrated below:   (Source: Max Maxfield / EE Times)   I'm thinking the size of the inner portal (excluding the surrounding "frame") should be around 4' wide by 6'6 tall in the real world, which equates to 1.5" wide by 2.44" tall in the diorama. This would give a diagonal of around 3.75". The reason I mention the diagonal is my next upper-cunning idea, which is to have a small LED or OLED or TFT display forming the portal itself.   This means could have something like a Raspberry Pi streaming video to the portal display. The simplest thing would be to have a constant "mirrored ripple" effect going on, like dropping a pebble in a pool of water. But we could enhance this by occasionally switching to short video snippets showing scenes from around the modern world -- like a beach, or mountains, or a jungle. We could also show occasional images of futuristic and/or alien worlds.   Ooh! Ooh! I just had another idea (you should see what life's like inside my noggin). What if the portal occasionally opened on a street scene or in an office building or anywhere with people? Whoever was on the other side would stop and point and have an expression of astonishment. In addition to being one of the figures in the diorama, I could have a cameo part in one of these video snippets. So could you! Once I get this up and running, I'll post another blog inviting anyone who is interested to send me an appropriate video snippet for inclusion in the portal.   One final consideration relates to the portal's frame. From what material(s) should this be formed? Do we like stone a la the portal in Stargate for example, or would we prefer a futuristic stainless steel look-and-feel. Perhaps the whole thing should be translucent white illuminated from within by a neon glow. Alternatively, how about a dark cherry wood frame inlaid with brass accoutrements (possibly including arcane symbols and esoteric inscriptions) to give a nod to the look-and-feel of the original Time Machine?   What do you think -- original time machine vs. my three-chair version vs. time portal? If the latter, do you prefer the floor-standing model or the "floating in air" realization? Do you have any suggestions relating to the type of display I should use for the portal? And how about the scenes that might occasionally appear? As usual, all comments and suggestions will be very gratefully received.
  • 热度 32
    2014-4-20 00:55
    2686 次阅读|
    5 个评论
        同事在年前的时候收到一个树莓派,知道我对硬件比较感兴趣,就让我试玩一下,对这种好事我向来都是不会拒绝的。只是年后的事情一直都比较多,没周末也杂事颇多,就给耽误了,今天终于空出时间来把玩一下这块板子了。对于树莓派(Raspberry Pi)的由来、参数什么的我就不介绍了,如果有不了解的,百度或者谷歌一下就好了。   据说这块只有信用卡大小板子的功能非常强大,你可以用它来开发各种酷炫的产品,包括机器人和可穿戴式电脑。在前不久深圳举办的Maker Faire上我还见到过一些创客用树莓派DIY的产品。不过我是还没打算用这块板子来DIY什么新奇的产品出来,那个以后再说,今天就先让它运转起来再说。   图1:树莓派开箱图。   图2:树莓派正面。   图3:树莓派反面。     由于我同事给我的只是一块纯粹的电路板,要想树莓派运行起来的,还需要自己准备一些东西,还好这些东西我家里基本都有。需要准备的东西有:4G以上的SD卡一张、5V 1A左右的电源一个、RJ45网线一根、USB接口的鼠标和键盘各一个、HDMI线一根和带HDMI接口的电视机或者显示器。   除此之外,还需要到树莓派的官网上去下载一个系统镜像,你可以选择只下载一个单独操作系统镜像,也可以下载NOOBS那个镜像。我选择的是NOOBS,这个镜像里面包含好几个操作系统,离线文件1.3G左右。   然后按照NOOBS里面的安装指南,又去SD卡的官方网站(https://www.sdcard.org/downloads/formatter_4/eula_windows/)下载一个格式化SD的工具,按照提示安装后,格式化SD卡,格式化的时候注意“格式化选项设置”里的“逻辑大小调整”需要选择开启。格式化后,将NOOBS解压缩后拷贝进SD卡。最后把SD卡插进树莓派上,连接好各种线后,就可以开机了。   图4:连接后线后的树莓派。   开机后进入安装系统的界面,如图5,在这里可以根据你SD卡的空间大小,选择安装一个或者几个系统。我选择了安装推荐的Raspbian系统和另一个可以播放视频的RaspBMC系统。选择好后,点确定就行了,然后就是等待了,跟我们安装Windowns系统的过程基本差不多。   图5:安装操作系统选择界面。   图6:操作系统安装过程。   操作系统安装完成后,就可以选择进入的系统了。我先进入Raspbian系统,启动过程会出现一系列的初始化命令行。然后就会出现一个类似电脑BIOS界面设置界面。在这个界面里可以设置树莓派是否以窗口模式启动、系统语言、更改密码、区域和时区等等。设置好后,点击完成。重新启动就可以进入窗口模式了。   图7:Raspbian系统界面。   现在看到的界面跟我们常用的Windowns界面差不多了,然后就可以尽情体验里面的乐趣了。还发现里面竟然还有一个Pi Store,商店里的几款游戏还是收费的。   图8:树莓派上网界面1。   图9:树莓派上网界面2   图10:Pi Store。   另外,发现鼠标不一定需要有线的USB鼠标,无线免驱动的鼠标也完全OK。这次的试玩就先写到这里了。      
  • 热度 21
    2014-2-27 14:06
    1993 次阅读|
    0 个评论
    If you are an 80s kid in the United States, you undoubtedly remember a toy called "Teddy Ruxpin." Your feelings of this bear likely range from fondness, such as happy memories of it "reading" you a story; dread, possibly fear; or curiosity about how it worked. Maybe you even felt some envy at the time if you didn't have one, likely replaced years later by curiosity about what made you want one.   Nearly 30 years later, you might again think upon that doll and realise that with modern microcontrollers, like the Arduino, this doll could be made into something different and debatably better than what it was originally intended for. Fortunately, if you'd like to start tearing into one, you can build on the excellent work of others. Mechanically, the bear is extremely simple, using one servo to control both the eyes and the mouth. Although I haven't personally disassembled one, I would guess that here is a mechanical linkage (possibly a cam) that keeps the eyes open while the servo travels through a certain range. This would allow it to actuate the mouth to "read" the story while the eyes stare creepily ahead until the servo was fully lowered. To get to the electronic goodies, you'll have to remove a flap on the back of the bear's shirt. The tape player then needs to be removed to get to the three servo wires inside the bear's body cavity. There are also two apparent power wired in this space, but if you're going to replace its centrally-located "brain" with your own controller, these likely won't be needed. There are some more pictures on wgz.org that help illustrate what is needed here. The other three wires can then be hooked up to your own controller solution for whatever mischief you'd like to cause with it. An Arduino, Raspberry Pi, or even a pyMCU come to mind. This article on Ars Technica uses an Arduino as a method for a computer to "possess" the bear, and sync up mouth movements with the Windows voice synthesiser. If one wanted to go even further, a Raspberry Pi would seem like an idea candidate for a stand-alone system. Going even further, I'd love to see one with servos embedded in the shoulders to allow for some crude arm movement, or maybe something to actuate the eyes. LEDs might be an even better solution to allow them to glow at opportune times. Of course, that doesn't even get into the possibility of using some sort of sensors for feedback. Maybe a passive infrared sensor could be used to surprise unsuspecting passers-by. It's not too early to think about your Halloween display this year! Taking a different tack, maybe you'd rather see 80 of them talking in sequence . Maybe a Bluetooth or WiFi connection could be used for something similar if a stand-alone system was devised. It seems like a strange thing for kids to want today, but it was the best selling toy of 1985-1986. On the other hand, maybe I just don't possess or understand the psychology of a 5-year-old anymore. This is probably a good thing. Finally, if you're wondering what a "Teddy Ruxpin" is, or just want a reminder, check out this YouTube channel for a sampling of what this little animatronic bear is all about . Jeremy Cook is a manufacturing engineer with 10 years experience and has a BSME from Clemson University.  
  • 热度 17
    2013-3-31 16:07
    1006 次阅读|
    0 个评论
    天九电子科技,专业的电子元器件IGBT,MOSFET,集成电路IC,二三极管的现货库存代理商。 公司只做原装正品。大量现货库存。 深港两地。代英飞凌,西门康,TI,IXYS,maxim,IR ,FSC,PI,Sanken等国际品牌产品。www.igbtic.com   **一批现货:   TOP244PN            PI        35K   DIP FGH40N60UFD   FSC   64K    TO-247AC IKW40N120T2      INF   19K     TO-247 IKW40N120H3    INF    24K    TO-247 IXFK27N80Q       IXYS    6.5K   TO-264 SK70DT16          西门康   2K    ‘ UC3846N           TI            37.5K    DIP-16 UC3895DW       TI             35K      SOP 更多现货库存,请致电 0755-23345452    www.igbtic.com
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