For this step you probably should assemble the electronics on a solderless breadboard before soldering them together. The schematic to build the circuit is attached along with the hex file to load on the microcontroller. The Arduino 0007 code file is in the introduction so you can tweak it or make changes as you need.

It is very important to plan where all of the parts go, so all of the electronics will fit in the box the first time, If not it could be very frustrating and cause much grief.

It is also important to note that the NPN power transistor(s) will heat up, to overcome this I mounted them to contact the aluminum base of my project box, This way it acts as a heat sink, preventing a spectacular fire. You will also need to come up with something similar to remove most of the heat from the box.

Once the electronics are built, there is a section of code in the program to uncomment and and then load onto the chip to test the orientation of the coils. It pulses the coils off, pulling up, and pushing down, also indicated by the LED.

If you hold a magnet under the electromagnets and it doesn't follow the pattern, reverse the wires.

在制作電路板之前，先將電子元器件按照電路原理圖組裝在面包板上，然后再將這些電子器件焊好。電路原理圖與hex文件一起放在附件中。Hex文件是微控制器加載的文件，在它的介紹里提供了Arduino-0007代碼，讀懂它之后，若你口味重，你都可以對(duì)這些代碼進(jìn)行微調(diào)或者改變，以便做出你自己需要的效果。

能匹配盒子大小的面包板。

安裝和焊接芯片，電容等元器件。

組裝完大致就是這幅光景，看似一團(tuán)亂麻，但是你一定要心如明鏡！

特別提出，需要嚴(yán)格計(jì)劃各個(gè)部位的動(dòng)作，以便所有的器件在第一時(shí)間配合戒指盒做出反應(yīng)。要是你不乖不聽(tīng)我勸告，輕則麻煩不斷，重則胎死腹中。

值得提出的是，NPN功率管會(huì)發(fā)熱滴，它要是憤怒起來(lái)足夠引發(fā)一場(chǎng)小型“火災(zāi)”！我在基座的底部加了一塊鋁片充當(dāng)熱沉散熱。你也可以增加一些類似的方法將盒子中多余的熱量導(dǎo)出去，例如加個(gè)風(fēng)扇啊什么的……

電路板做好后呢，程序中的一部分代碼會(huì)自動(dòng)加載到微處理器芯片當(dāng)中，然后測(cè)試線圈的極性是否安裝正確。它對(duì)電磁線圈增加脈沖電流，測(cè)試上升，下降，同時(shí)在LED燈中有對(duì)應(yīng)指示。如果你在電磁鐵下面放置一個(gè)小磁鐵，但是它不按照既定路線辦事的話，則說(shuō)明你把線接反了……你只能重新接線。