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  • Hi gang! I'm listening to my portable crystal radio. All the power comes from the radio waves.

    嗨,夥計們!我在聽我的便攜式水晶收音機。我在聽我的便攜式水晶收音機。所有的動力都來自於無線電波。

  • Notice there's no ground connection. And the antenna is in here.

    請注意,沒有地線連接。而天線就在這裡。

  • As you can see there's not a lot to it. There's a crystal earpiece for listening

    正如你所看到的那樣,並沒有很多東西。有一個水晶聽筒,用於聆聽。

  • to.

    到:

  • Here's the adjustable capacitor for tuning in a radio station.

    這就是調入電臺的可調電容。

  • Here's a diode.

    這是一個二極管。

  • And this is the coil that the capacitor resonates with.

    而這就是電容諧振的線圈。

  • But the trick is that this coil also acts as the antenna.

    但訣竅是,這個線圈還可以作為天線。

  • This type of antenna is called a loop antenna, for reasons you can probably guess.

    這種類型的天線被稱為環形天線,原因你大概能猜到。

  • Here's how I made it. I started with an extra large pizza box.

    這裡'是我怎麼做的。我先用一個特大的披薩盒。

  • I could have just wrapped the coil around the outside of the box but I wanted it

    我本可以把線圈繞在盒子外面,但我想讓它... ...

  • protected. So I put it on the inside. That meant the coil needed some internal structure inside

    受保護的。所以我把它放在了裡面。這意味著線圈需要一些內部結構

  • the box. I decided to use the corners of the box's cover for that.

    的盒子。我決定用盒子'蓋的邊角來做。

  • Start by making the corners of the box's lid like this.

    先把盒子'的蓋子四角做成這樣。

  • The actual dimensions don't matter much, except that this length here needs to be

    實際尺寸並不太重要,只是這裡的這個長度需要是

  • about one inch longer than the box is deep.

    比盒子的深度長一寸左右。

  • Then cut the corners off the lid.

    然後把蓋子的邊角剪掉。

  • You should now have two pieces from the front and two pieces still attached at the

    現在,你應該有兩片從前面和兩片仍然連接在前面的

  • back.

    後面的。

  • Next we need to make slots for this piece to go through the box.

    接下來,我們需要為這一塊做槽,讓它穿過盒子。

  • First use one of the pieces to mark the where the slot should you go for all four corners.

    首先用其中一塊標記出四個角的槽應該去哪裡。

  • Then cut them.

    那就把它們切開。

  • And then tape the pieces in place.

    然後用膠帶把這些片子貼好。

  • And there's the finish box.

    還有'的完成箱。

  • Next we need to make the tuning capacitor.

    接下來我們需要製作調諧電容。

  • We need two pieces of aluminum foil cut six inches by six inches each.

    我們需要兩片鋁箔,每片6英寸,每片6英寸。

  • A piece of paper cut seven inches by nine inches.

    一張7英寸乘9英寸的紙。

  • A paper towel roll.

    一卷紙巾。

  • And some tape. It doesn't matter what kind.

    還有一些膠帶。不管是哪種。

  • Tape one of the pieces of aluminum foil to the paper towel roll near one end.

    將其中一塊鋁箔貼在紙巾卷靠近一端的地方。

  • Tape the other piece of aluminum foil

    粘貼另一塊鋁箔

  • on one end of the piece of paper.

    在紙片的一端。

  • Next, take the paper with the aluminum foil and wrap it around the tube.

    接著,拿帶鋁箔的紙包住管子。

  • Wrap it around tightly,

    緊緊地包住它。

  • but not so tightly that you can't slide it back and forth.

    但不要太緊,以至於你不能來回滑動。

  • Next, I'm going to make electrical contact with the aluminum foil for each of these pieces.

    接下來,我'要為每一塊鋁箔做電接觸。

  • To do that I've got this wire, and I'll strip it bare for a long length.

    為了做到這一點,我'了這根線,我'會把它裸露出來長長的。

  • And then

    然後

  • wrap it around like this

    繞來繞去

  • and twist it on.

    並把它扭上。

  • And there we go. That's contact with one end.

    就這樣,我們走了。這就是與一端的接觸。

  • Now repeat the same thing for this end right here.

    現在在這裡重複同樣的事情。

  • And there we go. Two wires now attached

    我們走吧兩根電線現在連接起來

  • to the variable capacitor.

    到可變電容器。

  • Finally, I cut a tab out of the top of the box for putting the capacitor on

    最後,我在盒子的頂部剪掉了一個標籤,用於放電容器

  • when in use.

    在使用時。

  • Next is to make the loop antenna coil. I'm using twenty six gauge (AWG) wire and doing

    接下來就是製作環形天線線圈。我'使用二十六號(AWG)電線,並做了

  • fourteen turns.

    十四轉。

  • Twenty two gauge, eighteen gauge and so on will also work. Just make sure it's insulated.

    二十二號、十八號等也可以用。只要確保它'的絕緣。

  • As you can see the more turns you have, the harder it is to pull the wire. But doing

    大家可以看到,圈數越多,拉線越難。但做

  • like I'm doing here works quite well.

    像我'在這裡做的工作相當不錯。

  • Finally, I cut the wire, leaving long ends to work with.

    最後,我把鐵絲剪斷,留下長長的兩頭來加工。

  • And then secure the ends in place by putting them through holes one corner.

    然後將兩端穿孔一角固定好。

  • Next to connect it all together.

    接下來要把這一切聯繫起來。

  • Here's the wiring diagram but I'll show you each connection as I make it.

    這裡'是接線圖,但我'會告訴你每個連接,因為我使它。

  • First remove the insulation from the ends of the coil wires.

    首先將線圈導線兩端的絕緣層拆除。

  • Open the capacitor to its fullest length. That's so that you know how much wire is needed

    將電容器開到最大長度。這樣你就可以知道需要多少線了。

  • to reach inside the box.

    以達到箱內。

  • Then connect one end of the coil to one of the capacitor wires. It doesn't

    然後將線圈的一端連接到電容線的一端。它不'。

  • matter which one.

    不管是哪一個。

  • Then connect the other end of the coil to the other capacitor wire.

    然後將線圈的另一端與另一根電容線相連。

  • Then connect one wire to either of the places where you connected the coil

    然後將一根線連接到你連接線圈的任何一個地方。

  • and capacitor wires together.

    和電容線在一起。

  • Next for the diode.

    接下來為二極管。

  • It has to be a germanium diode. In my case part number 1N34.

    它必須是一個鍺二極管。在我的情況下,零件號為1N34。

  • Find the end of the diode that doesn't have the stripe on it. Connect the other end

    找到沒有條紋的二極管的一端。連接另一端

  • of that wire to that end of the diode.

    的那根線到二極管的那一端。

  • Next, connect another wire to the end of the diode with the stripe on it.

    接下來,將另一根導線連接到帶有條紋的二極管末端。

  • The other end of that wire goes out the top of the box.

    那條線的另一端從盒子的頂部出去。

  • Connect another wire to the other place where you connected the coil and capacitor wires

    將另一根線連接到連接線圈和電容器線的另一個地方。

  • together and run the other end out of the top of box.

    一起,並將另一端從盒子的頂部跑出來。

  • Now you can close the box.

    現在你可以關閉盒子了。

  • Lastly, the earpiece. For this circuit it has to be a crystal earphone, also called a

    最後是聽筒。對於這個電路來說,它必須是一個水晶耳機,也就是所謂的。

  • crystal earpiece. I'm using on I made myself by hot-gluing a hollow tube

    水晶聽筒。我使用的是我自己做的熱膠空心管。

  • to the opening of a piezoelectric buzzer.

    到壓電蜂鳴器的開啟。

  • Connect the wires of the earphone to the wires you just ran out of the top of the box

    將耳機的線與剛才從盒子頂部跑出來的線連接起來。

  • in the previous steps.

    在前面的步驟中。

  • And you're ready to test.

    而你'就可以測試了。

  • To test it, start with the capacitor in some position and rotate the box. The flat side of

    測試時,先將電容放在某個位置,然後旋轉盒子。扁平的一面是

  • the box should be facing a radio station. If you don't know where one is, then keep

    盒子應該是面對一個電臺。如果你不知道哪裡是一個,然後保持。

  • slowly rotating it.

    慢慢地旋轉它。

  • If you don't find something, then readjust the capacitor and try again.

    如果你沒有發現什麼,那就重新調整電容,再試一次。

  • Nice and loud right there. It sounds like news.

    很好,很響亮,就在那裡。這聽起來像新聞。

  • I'll put it in the microphone.

    我把它放在麥克風裡。

  • Hopefully you heard that.

    希望你能聽到。

  • Loud and clear.

    響亮而清晰。

  • Well thanks for watching! Check out my youtube channel, rimstarorg, for more

    好吧,謝謝你的觀看!查看我的youtube頻道,rimstarorg,瞭解更多。

  • videos like this. That includes one on how to make your own crystal earphone. One

    這樣的視頻。其中包括一個如何自制水晶耳機的視頻。一個

  • with a bunch of crystal radio troubleshooting tips. And for variety,

    與一堆水晶收音機的故障排除技巧。而對於各種。

  • one on how a rocket works to get from Earth to orbit using SpaceX's Falcon 9

    一個關於火箭如何使用SpaceX公司的獵鷹9號火箭從地球進入軌道的工作原理

  • as an example.

    為例。

  • And don't forget to subscribe if you like these videos or give a thumbs-up or leave

    不要忘了訂閱,如果你喜歡這些視頻,或給一個大拇指或離開。

  • a question or comment below.

    在下面提問或評論。

  • See you in a bit!

    一會兒見!

Hi gang! I'm listening to my portable crystal radio. All the power comes from the radio waves.

嗨,夥計們!我在聽我的便攜式水晶收音機。我在聽我的便攜式水晶收音機。所有的動力都來自於無線電波。

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自製可攜式電晶體收音機(Portable Crystal Radio using Loop Antenna and Pizza Box)

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    Why Why 發佈於 2013 年 04 月 06 日
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