...ains coils, such as transformers or inductors. These components use electromagneti** to convert AC main power to low-voltage DC power. The varying magnetic fields generated by these components can cause them to physically vibrate at high frequency, resulting in a high-pitched noise. Most modern AC a...
...是一个由Q&a网站组成的社区驱动分组。 问题 尽管反磁铁规则屡屡被重复,以至于成为法律,但它实际上是硬件安全的硬性规定吗?超级用户读者Aequitarum Custos想弄清这一切: When I first started using computers, law of the land in compute...
...e Evil Mad Scientist blog. He used cheap mason jars, LEDs, and a coin cell batteries to make what looks like a garden solar light but without the expense, you know, of buying an actual solar light. So clever! The only thing I’d suggest is that you buy your coin cell batteries online. If you go to ...
...ile you can download. 使用免费的Photoshop操作自动删除背景 如何用photoshop操作在几秒钟内编辑数百张复杂的照片 The previous tip provided you with a ready-made, downloadable Action file for removing backgrounds automatically. You can create Photoshop Acti*** to perform ...
...he battery “rotating” idea does not make sense electrically unless the batteries are in parallel (rarely used that way). Nearly all battery circuits are in series (which you can tell if their polarity is reversed one from another within the battery compartment). The resistance of a weak battery ...
...池的寿命: I have two tricks I use for getting more juice out of my batteries before throwing them away. The first is “the swap” and the second is “the conveyor”. I’m not sure why this works (maybe the individual terminals in electronic devices don’t have equal pull from the batteri...
对新硬件的审查和讨论已经开始结束,但在接下来的一周里还有一些小工具需要讨论。不管你信不信,现在也是时候开始谈论2021年的消费科技了。不,不是CES,而是三星。外界普遍预计,该公司将在1月份举行GalaxyS21活动,而不...
...诉你什么。例如,您将能够获得更多关于您的汽车“检查发动机”指示灯为何亮起的信息,并且您甚至可以在发生事故时获得有关您的车辆的一系列详细信息(如果这些信息有助于表明您没有错,则特别有用)。OBD-II有线设备的...
...。 什么是螺线管(a solenoid)? 螺线管是指盘绕成螺旋状的电线,如下图所示: A solenoid If the wire is long and thin, when a current is sent through the wire a uniform magnetic field forms inside the solenoid. The magnetic field strength for this uniform field can be give...
...单极(无论是n极或s极)不存在的性质。如果我们把一块磁铁分成两块或多块,每一块都会形成一个磁场(magnetic field that is a popular topic of discussion is that an electric monopole (single charge) exists but a magnetic monopole (either n-pole or s- pole) does n...