s******7
发帖数: 158 | 1
This is a bad example. It's hard to maintain similar brightness among
paralleled LED lanes. You cannot make sure P-N junction of each LED is
identical, so any small voltage change across the junction would introduce a
large current change and thereby introduced observable brightness
difference among LEDs. The underlie physics is that the current through a P-
N junction is an exponential function of applied voltage. Easiest way is
making all LEDs in series so that every LED's through current can... 阅读全帖 |
|
k*1
发帖数: 498 | 2 新车，刚过1000mile，两个个问题，实际上是三个：
1. 发动之前放在ACC等自检，检完了黄的引擎灯，同时提示我电池low voltage，引擎
灯只有在ACC自检的时候亮，车发动了就没了，不知道什么时候开始的。 电池low
voltage报警从一开始就有，我以为某次开久点就好了，但是发现不是这样的，开了五
次200mile+都不能把电池充满，每次ACC自检都会报警。
问题1）引擎灯的情况正常么？
问题2）电池的情况正常么？
2. 发现在强烈的阳光下，前挡风玻璃会有清晰的纹路，不规则，就像是裂了一样，但
是显然不是裂了，除了强光照射其他情况下看不出来。最近降温，稍冷。
问题3）这样的情况正常么？会不会有潜在的隐患？
车在warrant里，没有任何事故，我就想知道需不需要送去修。
P.S.吐槽小切的transmission |
|
W***n
发帖数: 11530 | 3 1 eninge off, turn on headlight for 10 min
check the battery terminal voltage
should be 12-12.5 V
2 start engine, check the battery terminal voltage
should be around 14 V, if less than 13 V
most likely t alternator is bad
btw, make sure t alternator drive belt is in good shape |
|
m******8
发帖数: 1676 | 4 no load voltage 9.18V
Loaded Voltage 8.22V
今天回家停车， 看见仪表板上电池的指示灯亮了，
进屋拿了东西想去DEALER， 但车已经打不着了。 以为4.5 年的电池死了。
就叫AAA来换电池。AAA来了后， 我一打， 车又着了， 但除了电池灯以外， 其他两个
别的灯也亮了。
AAA 拿仪表一测， 出现上述数字， 说是ALTERNATOR坏了。不能卖给我电池。
只有明天拖到DEALER去修。
修这个大概多少钱？ |
|
h*********2
发帖数: 208 | 5 I have one Philips 8500X AC ADAPTER 15V DC 360mA QT4070 POWER SUPPLY
Wallmount Adaptor Direct plug in Charger Class 2 IV.
MANUFACTURER: Philips Electronics North America Corp.
* MODEL NO.: 8500X
* INPUT Voltage: AC 100-240V ~ 50/60Hz 9W
* OUTPUT Voltage: DC 15V 360mA
* CONNECTOR TYPE: 2Pin female fig B
* CONNECTOR / Pin Dimension: 5 x 8 x 11 mm approx.
* DIMENSION: 5.8 x 4.1 x 2.5 cm approx. Protuding parts are not included
* WEIGHT: 60 GRAMS
TO USE WITH: Philips QT4070 Charger for hair cutting ... 阅读全帖 |
|
t**l
发帖数: 206 | 6 目前在招聘以下职位，Intertek是全球最大的安规认证公司之一，是美国Nationally
Recognized Testing Laboratory (NRTL)。此职位prefer电气工程（电力电子，电器，
电力系统，自动化等）背景，其它专业比如机械等，条件不错也可以考虑。公司
Sponsor H1B和绿卡。谢谢！
联系email: [email protected]
12881BR
Project Engineer - Energy
United States
Cortland
New York
Job Description
This position is responsible for providing engineering expertise to evaluate
conformance of inverters, wind turbines, generators, solar panels and other
power generation equipment to industry standards, creating evaluation
r... 阅读全帖 |
|
h*********2
发帖数: 208 | 7 I have one Philips 8500X AC ADAPTER 15V DC 360mA QT4070 POWER SUPPLY
Wallmount Adaptor Direct plug in Charger Class 2 IV.
MANUFACTURER: Philips Electronics North America Corp.
* MODEL NO.: 8500X
* INPUT Voltage: AC 100-240V ~ 50/60Hz 9W
* OUTPUT Voltage: DC 15V 360mA
* CONNECTOR TYPE: 2Pin female fig B
* CONNECTOR / Pin Dimension: 5 x 8 x 11 mm approx.
* DIMENSION: 5.8 x 4.1 x 2.5 cm approx. Protuding parts are not included
* WEIGHT: 60 GRAMS
TO USE WITH: Philips QT4070 Charger for hair cutting ... 阅读全帖 |
|
s*********7
发帖数: 1 | 8 家人从国内给带来紫砂多功能全自动煎药器。 用了几次，用来给太太调理身体。效果
很好。 因为怀孕了，就不需要这个煎药器了。所以现在以友情价转让。地点在大华盛
顿地区，Arlington-close to Virginia Square metro.
以下说明来于生产商网站：
祺鑫自控式多用煎药器主要用于煎煮中药，炖煮中药补品、汤料、咖啡等。
1、煎药器优质紫砂泥料，传统工艺结合现代科技精心烧制；
2、煎药器全自动煎药，无须专人看管，不煎干，不沸溢；
3、煎药器全自动保温，不回吸药液；
4、煎药器符合传统煎煮中药的药液要求（液量约一食碗）；
5、煎药器现代设计奖，传统煎药，有效提炼药材。
额定电压(V)：220
额定功率(W)：300
给买家的温馨提示： 您可以在Amazon 上买一个电压转换器。我买的是300瓦的，$26.
71 . 我的电压转换器不卖，因为我还有别的国内带来的电器需要转换电压。
Power Bright VC300W Voltage Transformer 300 Watt Step Up/Down converter 110/
120 Volt - 220/240 V... 阅读全帖 |
|
k*****n
发帖数: 9823 | 9 ☆─────────────────────────────────────☆
digitalcat (magnificent Chopin!!) 于 (Tue Dec 13 10:57:37 2005) 提到:
First note I'm not an expert on electronics, Xin himself can answer your
questions better, since you've already posted on his forum.
But for the problem he mentioned about standard pin and voltage, I think it's
because what he had in mind is a portable amp powered by 2 AAA batteries, and the op-amp can be swapped out by end-users, so ultra-low working voltage and standard pins are impo |
|
A*********l
发帖数: 2005 | 10 In general speakers don't have "power supply". The receiver sends both the
signal and the power to the speakers through speaker cables (i.e. sending
the amplified signals to the speaker).
Sub-woofer often have their own amplifier built-in, which will have voltage
problem.
Receiver does have voltage problem. |
|
j********n
发帖数: 792 | 11 明白了。引用某网某人的一段，如果他说的是对的，我就不担心了。
The truth is at normal listening levels, very little power is needed to get
the most out of a relatively efficient speaker. Whether you have an 80W amp
or a 220W amp, the channel still follows Ohm's law. Normal listening volume
means voltage is low, which means current is also low. The load to the
receiver should be close to constant around 8 ohms. We're really talking
like 10-20 watts.
It's a complete misconception (and a very popular one) to think a more
powerful... 阅读全帖 |
|
S********n
发帖数: 4 | 12 【 以下文字转载自 Texas 讨论区 】
发信人: SPShouston (灌水加压), 信区: Texas
标 题: FMC has opening for 3 positions
发信站: BBS 未名空间站 (Mon Oct 24 12:01:18 2011, 美东)
Hi Folks
FMC has 3 openings for the subsea processing system, if you are interested,
you can send me your resume in txt to my bbs mail box. Thanks.
1. Electrical Power Engineer
Summarize briefly the major function and purpose of the position.
Conceptual design of high-voltage subsea power distribution systems
to support the overall design of
subsea ... 阅读全帖 |
|
A*******s
发帖数: 23 | 13 【 以下文字转载自 JobMarket 讨论区 】
发信人: AppleJobs ((can help refer)), 信区: JobMarket
标 题: [Apple Jobs]Power system, AC-DC, backlight driver
发信站: BBS 未名空间站 (Tue Feb 5 01:48:09 2013, 美东)
Send resume with position title to a****************[email protected]
Sr. AC-DC Designer
Sr. Power Systems Engineer
Sr DC-DC Power System Design Engineer
Sr. Backlight Driver Chip Definer
Sr. AC-DC Designer
Job Summary
Imagine what you could do here. At Apple, great ideas have a way of becoming
great products, services, and cus... 阅读全帖 |
|
a*m
发帖数: 6253 | 14 【 以下文字转载自 EE 讨论区 】
发信人: aTm (Aggie), 信区: EE
标 题: Opennings: senior PMIC designers
发信站: BBS 未名空间站 (Thu Aug 1 01:27:31 2013, 美东)
The successful candidate will be involved in research, definition, design,
simulation, layout supervision, characterization and release to production
of high-performance state of the art BiCMOS integrated circuits in the
following areas:
Power Management – LDOs, SMPS, Battery chargers, LED drivers, Charge Pumps,
Audio Amplifiers – Class D, AB, …
Interface Circuits –SPI... 阅读全帖 |
|
t**l
发帖数: 206 | 15 目前在招聘以下职位，Intertek是全球最大的安规认证公司之一，是美国Nationally
Recognized Testing Laboratory (NRTL)。此职位prefer电气工程（电力电子，电器，
电力系统，自动化等）背景，其它专业比如机械等，条件不错也可以考虑。公司
Sponsor H1B和绿卡。谢谢！
联系email: [email protected]
12881BR
Project Engineer - Energy
United States
Cortland
New York
Job Description
This position is responsible for providing engineering expertise to evaluate
conformance of inverters, wind turbines, generators, solar panels and other
power generation equipment to industry standards, creating evaluation
r... 阅读全帖 |
|
y****r
发帖数: 211 | 16 Java Engineer/QA openings
Contact me by replying this message
============ Junior/Senior/Principal Engineer ============
Job Description
We are looking for a Software Engineer to help us build our personalization,
recommendations, and merchandising platform and applications.
We are building a team from scratch so you'll jump in at the ground floor.
You'll have the autonomy, responsibility, and access to all parts of the
technology stack (think UI to web services to Hadoop) that you'd never have... 阅读全帖 |
|
A*******s
发帖数: 23 | 17 Send resume with position title to a****************[email protected]
Sr. AC-DC Designer
Sr. Power Systems Engineer
Sr DC-DC Power System Design Engineer
Sr. Backlight Driver Chip Definer
Sr. AC-DC Designer
Job Summary
Imagine what you could do here. At Apple, great ideas have a way of becoming
great products, services, and customer experiences very quickly. Bring
passion and dedication to your job and there's no telling what you could
accomplish.
Key Qualifications
See below
Description
Job Descripti... 阅读全帖 |
|
m****s
发帖数: 18160 | 18 【 以下文字转载自 EE 讨论区 】
发信人: aTm (Aggie), 信区: EE
标 题: Opennings: senior PMIC designers
发信站: BBS 未名空间站 (Thu Aug 1 01:27:31 2013, 美东)
The successful candidate will be involved in research, definition, design,
simulation, layout supervision, characterization and release to production
of high-performance state of the art BiCMOS integrated circuits in the
following areas:
Power Management – LDOs, SMPS, Battery chargers, LED drivers, Charge Pumps,
Audio Amplifiers – Class D, AB, …
Interface Circuits –SPI... 阅读全帖 |
|
c*****n
发帖数: 195 | 19 Position Summary
Work at the Bio5 Oro Valley, AZ. Experience with electrophysiological assays
is required. Priority will be given to candidates with extensive experience
in small molecule drug screening using patch clamp and voltage clamp assays.
Duties and Responsibilities
*Perform ion channel recording.
*Perform drug screening using two-electrode voltage clamp assays.
*Develop antiviral assays.
*Large scale protein expression, purification, and characterizations.
*Collaborate in the in... 阅读全帖 |
|
p**********g
发帖数: 9385 | 20 Voltage may be a little bit lower than required.
Try Philips-brand light tube may be helpful if you
are using other brands such as GE. Philips requires
slightly lower voltage to start. |
|
O*******d
发帖数: 20343 | 21 In North America, regular residential houses are served with SINGLE PHASE,
CENTER TAPPED 120V/240V system. This system has 3 wires, two hot and one
neutral. The voltage between each hot wire and neutral wire is 120V. The
voltage between two hot wires are 240V. Most room receptacles are wired
between a hot wire and the neutral wire, providing 120V. Large electric
appliances, such as stove, oven, cloth dryer and central AC are using
electricity supplied from the two hot wires.
A 3 wire system |
|
g*****9
发帖数: 4125 | 22 You are some what right. But here is how the "problem" was solved.
Since one phase-to-neutral voltage (phase 'B') is higher than the others, no
single phase loads can be connected to this phase. This eliminates the
ability to use one third of the breakers in a panel for single-phase loads.
Further, the lack of loading on the high leg will result in an unbalanced
load. However, many new fluorescent ceiling fixtures utilize ballasts which
automatically sense line voltage. These fixtures are design |
|
g*****9
发帖数: 4125 | 23 Dewalt is one of the best, if you want to start a collection, buy 18V, they
have most tools in that voltage, you don't need higher voltage than 18. |
|
B****0
发帖数: 15 | 24 Half Hollow Hill school is one of the best is Suffolk county. The
particular neighborhood is not desirable location in Dix Hills:
1. High Voltage Power Line running through
2. Close to Wyandanch
It's still a good choice for first time buyer as long as the house is far
away from high voltage power line, but the one you have listed is VERY
close.
If you check google map, the HV power line is 3-4 property north to the
house.
guy |
|
g****d
发帖数: 88 | 25 It is not 高压电站 It is a transmission station which transe high voltage
electricity to lower voltage for local use. |
|
w**7
发帖数: 1265 | 26 ☆─────────────────────────────────────☆
shmimy (睡在窗台上的猫) 于 (Wed Jun 30 00:24:10 2010, 美东) 提到:
gauge 14的speaker wire从墙后穿到地下室，在墙里的部分要放在conduit里吗？
☆─────────────────────────────────────☆
sharpdressed (man) 于 (Wed Jun 30 00:57:23 2010, 美东) 提到:
不知道你当地code如何。不过speaker线有专门in-wall的，贵一些。
☆─────────────────────────────────────☆
ffviii (当当当) 于 (Wed Jun 30 01:12:54 2010, 美东) 提到:
UL listed?
☆─────────────────────────────────────☆
anywhere (春风再美也比不上你的笑) 于 (Wed Jun 30 01:15:47 2010, 美东) 提到... 阅读全帖 |
|
m*****n
发帖数: 5611 | 27 你说的这种应该是14 gauge的延长线
100 ft 13 amp的voltage drop是8V
如果你换成12 gauge，同样情况voltage drop是5V
够不够用只有你知道 |
|
|
k**n
发帖数: 3989 | 29 AP238-PS13-30
Features
Mounting version: Under cabinet
Available Dimension: 30" x 22" x 11.7" (W x D x H)
Voltage: 120v @ 60 Hz (USA & Canada Standard)
Speeds: 4 Speeds with Timer Function
Airflow: 385CFM / 490CFM / 615CFM / 900CFM
Noise Level: Low Speed: 46 dB to Max Speed: 69dB
Motor: Ultra Quiet Dual Squirrel Cage Motor
Keypad: Touch Sensitive Control Panel with Blue LED Lighting
Lighting: 2 x 20 W Dimmable Halogen lights
Venting Size: 8" Round Duct Vent on Top
Filters: Dishwasher Safe Stainl... 阅读全帖 |
|
s***a
发帖数: 299 | 30 I will say 6-10KV.
I think there is a transformer behind the tree.
so if the low voltage side is 110 or 220 V, the high voltage side can not be
too high |
|
n********r
发帖数: 2228 | 31 正在建新房子，预布线有两种方案
1, 传统数字监控RJ45 CABLE与LOW VOLTAGE POWER SUPPLY， Builder报价预布线四个
点要$85一个点， 共$340
2, 无线数字监控Pre-Wire 110V供电，每点要$35
现在比较纠结的是，这个钱是不是真的值得花？如果花的话，应该选哪个方案？
FOSCAM无线的很方便，但不适合室外环境，现在市场有什么合格便宜的适合室外环境的
无线摄象头吗？
现在市场上有没有比较便宜的用Low voltage的Camera可以不需要硬件控制盒子的适合
自己DIY的方案? |
|
c**********e
发帖数: 276 | 32 are you sure this is due to the low voltage power lines? I do not think it
is a big issue with the low voltage lines. |
|
s**********9
发帖数: 1238 | 33 我的吊灯也曾经有同样问题。查了一下，灯是LOW VOLTAGE的，后来专门买了个LOW
VOLTAGE的DIMMAR就没响了。 |
|
g*****a
发帖数: 204 | 34 看中一房子，家门口的路边上有个类似下水道井盖的东西，上面写着“high voltage".
里面能看到一捆黄色线也标着“high voltage"请问这到底是什么？多谢。 |
|
|
G***G
发帖数: 16778 | 36 the battery shows full charge.
but the voltage meter says 0 voltage in the output port of the battery.
what's wrong with the battery? |
|
i******t
发帖数: 149 | 37 在网上看了几款抽油烟机，准备买一个42“ island mount. 想在 XtremeAir 和
theRangehoodStore 中选一个。两个产品都没在网上查到评价。烦请用过的朋友给点意
见，多谢！
http://www.xtremeairusa.com/shop/product_info.php?cPath=5&produ
Pro-X Series
Model: PX06-I36 / PX06-I42
AVAILABLE SIZES: 36", 42"
MOUNTING TYPE: Island mount, residential use only.
BODY FINISH: Brushed finish.
BODY DESIGN: Full seamless square corner, T-shape.
MATERIAL: Super thick 1.0mm, Non-Magnetic commercial grade high quality
stainless steel.
FILTER: Swing-able & removable flat baffle fi... 阅读全帖 |
|
i******t
发帖数: 149 | 38 在网上看了几款抽油烟机，准备买一个42“ island mount. 想在 XtremeAir 和
theRangehoodStore 中选一个。两个产品都没在网上查到评价。烦请用过的朋友给点意
见，多谢！
http://www.xtremeairusa.com/shop/product_info.php?cPath=5&produ
Pro-X Series
Model: PX06-I36 / PX06-I42
AVAILABLE SIZES: 36", 42"
MOUNTING TYPE: Island mount, residential use only.
BODY FINISH: Brushed finish.
BODY DESIGN: Full seamless square corner, T-shape.
MATERIAL: Super thick 1.0mm, Non-Magnetic commercial grade high quality
stainless steel.
FILTER: Swing-able & removable flat baffle fi... 阅读全帖 |
|
F***Q
发帖数: 6599 | 39
subzero is supposed to consume very little power. many new models is below
100W.
my 24 yr old subzero (501R) has a label next to the door hinge, on the upper
side. It shows the model, manufacture date, operating voltage (115V) and
current (3.0 amp). If these are AC voltage and currents, then the average
power is supposed to be 115*3/2=172 Watt. |
|
|
m*********2
发帖数: 2788 | 41 Residential的当然和commercial/Public work不一样。有些trade要你给up to 65%
deposit, such as low voltage。当然你可以根据自己的喜好来制定付账的程序，但是
contractor是不是接受则是另外一回事，要看你谈判的技巧，或者你有什么bargain的
chip可以让contractor接受你的条件。都说了，自己监督盖房子是个受累不讨好的活。
另外不要小看预算外的花费，我老板的房子，已经和图纸上的设计大不一样了，很多
change的。
另外，随便给你列一下你要打交道的trade:
concrete, frame, termite treatment, fire sprinkler, dry wall, painting,
flooring, electric, mechanic, low voltage, civil (grading, underground
utilities), landscaping & irrigation, stone veneer (if), garage, masonry,
rebar,... 阅读全帖 |
|
|
N*****r
发帖数: 2108 | 43 好像是电压的问题
design voltage 14.40v
voltage 16.03v |
|
|
k****a
发帖数: 4944 | 45 Worldwide voltage adjusts automatically
Great for travel, the Philips Norelco 6945 features a protective cap for
safe portability. It has a worldwide voltage function that adjusts from 100
to 240 volts AC, making it ideal for international trips. |
|
S********n
发帖数: 4 | 46 【 以下文字转载自 Texas 讨论区 】
发信人: SPShouston (灌水加压), 信区: Texas
标 题: FMC has opening for 3 positions
发信站: BBS 未名空间站 (Mon Oct 24 12:01:18 2011, 美东)
Hi Folks
FMC has 3 openings for the subsea processing system, if you are interested,
you can send me your resume in txt to my bbs mail box. Thanks.
1. Electrical Power Engineer
Summarize briefly the major function and purpose of the position.
Conceptual design of high-voltage subsea power distribution systems
to support the overall design of
subsea ... 阅读全帖 |
|
s**********l
发帖数: 629 | 47
Not that bad. Those are more like "one-time" expense, no need to worry. What
's more expensive is the more or so unavoildable daily expenses.
Please dont bring them unless the voltage of these 小家电 is good for 220V.
Otherwise, you need voltage converters and so on, most likely not worth it.
Even in that case where your applicances are good for 220V, you will still
need to bring plug converters since the shapes of the plugs here are
different from the ones in the US.
I do receommend buying some |
|
c******g
发帖数: 246 | 48 直接乘起来就可以了吧。
不linear是在一定的电压范围内不linear，比如foward voltage前后就不一样，但是能
正常发光肯定是forward voltage以上了，有固定的drive current，消耗的power直接
乘就可以了 |
|
J******h
发帖数: 6102 | 49 这是wiki的回答。
这样看来，对于阿巴拉古的情形，怠速是可以充电的。
Does the alternator charge your battery when the car is idling?
Answer
Yes and no.
Yes: The alternator will charge the battery any time the engine is
running (even at idle) if the battery's voltage is below the
threshold (usually around 12 volts) so that the voltage regulator
triggers the alternator to generate power (around 14 volts) until
the battery is charged up.
No: If there is not enough consumption of power, the battery may be
charged enough and the |
|
G******l
发帖数: 2087 | 50 6月10日晚间消息，据国外媒体报道，近期美国版权组织(USCG)向华盛顿特区联邦法院
提起诉讼，指控5万名BT用户非法下载盗版电影。
世纪之交，反盗版大战诉讼风生水起，各大音乐厂牌对Napster上大量非法音乐下
载的用户提起诉讼。
现在，第二轮诉讼开始了。这次，接近5万名BitTorrent用户要面临电影制片厂的
起诉。
《拆弹部队》(The Hurt Locker)的制片商Voltage Pictures起诉2.5万名BT 用户
非法下载该影片。几周前，《敢死队》(The Expendables)的制片商Nu Image对2.3万名
BT用户提起了诉讼。
这两起诉讼均由美国版权组织向华盛顿特区联邦法院提起，该组织由位于华盛顿的
Dunlap、Grubb & Weaver律师事务所共同成立。
数字权利组织Electronic Frontier Foundation知识产权理事Corynne McSherry称
：“他们是靠版权诉讼牟利的人，采取拉网式诉讼。”USCG对此未予置评。
而Voltage Pictures和Nu Image发言人则表示：“这些律师只不过是在完成自己的
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