This Instructable contains both English and Chinese versions. 此instructable 包含中文版

Quadcopters are quite expensive now, but if one can make his own quadcopter, he will not need to spend so much money. Every part of my Quadcopter was bought on the internet, and I just need to put them together. Sounds easy, right? It is actually easier than it seems to be.

Chinese version:

四轴无人机现在售价昂贵，但若能自行拼装，制作成本将大大减小。这架四轴无人机的所有部件均在淘宝上购买，总费用850人民币。拼装非常简单，任何人都能完成。

Step 1: Purchase Needed Items (购买零件）

It is super easy to make a quadcopter.

Everyone can make his or her own quadcopter with about 140 dollars. The first step is buying needed items.

1. High speed motor *4

2. ESC *4

3. Propeller *2pairs+

4. Q250 frame

5. Battery & charger

6. Flight control (CC3D recommended)

7. Remote control (FS-i6 recommended)

8. LibrePilot (a free software on the computer)

Items below are not required but recommended

1. Heat Gun

2. eCalc (a special calculator)

3. Hexagonal screwdriver

Chinese version (中文版)

制作自己的四轴无人机非常简单，只需要约850人民币。以下是需要购买的部件。

电机*4：

https://item.taobao.com/item.htm?id=42200796373&ali_refid=a3_430582_1006:1103594726:N:%E9%93%B6%E7%87%952204:dd4f84816c70c1b932b55fdc20db2c5f&ali_trackid=1_dd4f84816c70c1b932b55fdc20db2c5f&spm=a230r.1.14.11.oJ51Dd#detail

ESC*4：

https://item.taobao.com/item.htm?spm=a230r.1.14.16.VtNlT4&id=44328898519&ns=1&abbucket=11#detail

叶片：

https://item.taobao.com/item.htm?spm=a230r.1.14.12.w4EjUw&id=531431625398&ns=1&abbucket=11#detail

飞控（标准版直针）：

https://item.taobao.com/item.htm?spm=a230r.1.14.25.dhgZh7&id=44883875000&ns=1&abbucket=11#detail

机架：

https://item.taobao.com/item.htm?spm=a230r.1.14.12.OvQl1h&id=541200993183&ns=1&abbucket=11#detail

遥控器：

https://item.taobao.com/item.htm?spm=a230r.1.14.32.ivgX7t&id=520487317861&ns=1&abbucket=11#detail

Step 2: Build the Frame of Your Quadcopter(组装机架）

The Q250 kit usually contains a Manual, so we just need to follow it. A hexagonal screwdriver is required. Don't afraid that the battery cannot be put into the frame once it is finished; the battery should be of the premium size and can be implemented or taken out easily.

Chinese version

Q250 机架包含说明书，按说明书组装就可以了。安装将需要六边螺丝刀。不用担心在完成机架后无法安装电池，因为电池的尺寸刚刚好。

Step 3: Implement Motors and ESCs(安装电机与电调）

Solder the wires of ESCs on the PDB(the Power Distribution Board is contained in the Q250 kit) and put the ESCs under the frame and consolidate them with transparent sticky tapes. Don't hurry to solder 3 wires on ESCs to motors because their sequence is unknown now. Solder the ESCs to motors only after adjusting. You can temporarily put them together with Conductive Tapes. Glue the flight control and remote control receiver on the upper deck of the quadcopter and go to the next step.

Chinese version

将电调的正负极分别焊接在PDB版的正负极上。PDB版已经被Q250机架包含在内了。将电调用透明胶固定在机架下方。此时不用将电调的电源线焊接在电机上，可以用导电胶带暂时链接，等调试完毕再焊接。将飞控与无线电接收器粘在上甲板上。

Step 4: Connect Wires(接线）

The connection between the flight control and the ESCs is like this:

Right front: 1

Left front: 2

Left behind: 3

Right behind: 4

The connection between the flight control and the remote control receiver is like this:

First, attach the only bind with three wires the channel 1.

Then, from channel 2 to 6, the sequence of color of lines is : Brown, Red, Orange, White, and Yellow. In fact, the sequence of wires on the flight control is of the same sequence of wires on the receiver.

Chinese version

飞控与电调的接线如下：

右前：1

左前：2

左后：3

右后：4

飞控与无线电接收器的连线如下：

先把唯一一根把3根线绑在一起的接在CH1

从CH2到CH6的线的颜色依次为：棕，红，橙，白，黄。其实，无线电接收器上的线的顺序与非空上线的顺序是一致的。

Step 5: LibrePilot Configuration (LibrePilot调试）

This step is rather simple; the guide on the Librepilot is simple enough and very easy to follow. Just follow all their steps and your quadcopter will be succesfully adjusted. Click the big yellow button on the right upper corner to start, and configure your remote control immediately to avoid mistakes. The sequence of wires between the ESCs and motors will be determined during the adjustment process.

Chinese version:

这部非常简单，只需要跟随LibrePilot的向导就可以顺利的完成调试。点击右上方的巨大黄色按钮开始调试。在飞机调试完成后建议立即调试遥控器以避免出错。电调与电机之间的线的顺序会在调试过程中被确认。

Step 6: Battery Charge & Install(电池的充电&安装）

Normal batteries cannot provided electric current strong enough to power high speed motors, so specialized batteries are needed. I recommend 3S 25C level battery because it is both powerful and light. This kind of battery also need special chargers to prevent explosion. Also, the Q250 frame may not contain wires that connect its PDB the the battery. Better consult the seller if their Q250 have wires and shown in the third picture. You will need to buy this wire if your Q250 frame doesn't contain it.

Chinese version:

一般的电池无法为高速电机提供足够的电流，必须使用航模专用电池。建议使用3S 25C等级的电池以提供澎湃的动力。这种电池需要专门的充电器以避免爆炸。您所购买的Q250机架可能没有PDB板与电池的连接线。在购买前可以询问商家是否赠送充电线，如果没有则需额外购买。

Step 7: First Flight(第一次飞行）

It is not easy for new comers to control a quadcopter. It respond to your controller really fast and may move to directions with out control. Don't fly too high on your first flight and make sure that no one is surrounding the quadcopter. If your quadcopter goes out of control, just close the accelerator and let it fall to the ground in order not to harm people. If the propellers are broken unluckily, you will have to use new propellers. This is why that you should but more than 2 pairs of propellers.

Chinese version

飞行四轴无人机并不简单。它反应速度很快，并且可能突然向未知方向移动。在第一次飞行时不要飞太高，并且确认飞行边没有人。若飞机失控，关闭油门使其自由落体，以避免对他人带来伤害。若桨叶损坏，您将不得不跟换新桨叶，所以建议购买额外的备用桨叶。