[Daily circuit diagram] 7, the design of a PCB process and details • Summary--to the layman's classmates or just into the students a macro view of the General circuit board design process of the article

Objective

The last two days using AD14 software designed a Bluetooth anti-loss circuit board (PCB) drawings, the middle of some details in this document, to facilitate the next design of the PCB reference. Also hope to give the layman's classmates or just into the students a macro view of the General circuit board design process of the article.

First, install AD14, crack, account registration, plug-in download method Daquan

Link: http://pan.baidu.com/s/1jHlgZT8 Password: lyg5

PS: This tutorial is for technical exchange only, it is recommended to purchase the software right from legal means, and maintain the rights of software developers.

Specific steps:

1, download the ISO image file, use Utrualiso or good pressure to load the image file and run the installation (all by default);

2, install after open AD, select Dxp->my Account, click Add Standalone license file, in the installation directory of license to choose one, If a registration message appears in the Standalone-offline column, the registration is successful.

3, (optional) If you want to display Chinese: at the bottom of the dxp->preference->system->general localization, tick this option and restart AD.

4, (choose to do) if you want to install some of the ad plug-ins: first to register the ad account, you can refer to this article:http://www.amobbs.com/forum.php?mod=viewthread&tid=5588598& Highlight=ad14 in the section, and then login to download the plugin.

5, (choose to do) sometimes need to save the ad project to Protel SE project, need to download the relevant plug-ins, and then save to the appropriate format, if you want to Protel 99se in the DDB How to import Altium designer can refer to:/http Jingyan.baidu.com/article/aa6a2c14da4e660d4c19c486.html

Second, the use of AD design PCB basic process:

1, according to the requirements of the system structure diagram

such as Bluetooth anti-loss device:

Basic requirements: Bluetooth 4.0, tri-Color LED status alarm indication, selfie, button battery, non-rechargeable but low power consumption

Module Required: Bluetooth 4.0 module +3 Color Light module + Button module + button battery module + Power Management module

2, sub-module research component selection and sub-module sketch design

such as Bluetooth anti-lost Bluetooth 4.0 module thinking:

1. What are some of the chips used in the market for Bluetooth 4.0 anti-loss/low-power Bluetooth module? --nrf51822, CC2540 ....

2. Access to relevant information including: Chip datasheet, PS, reference manuals, tutorials, forums, etc. to find the basic electrical characteristics of each chip, cost, whether it is convenient to purchase, function, etc., at the same time will be combined with the overall schedule requirements to select the appropriate chip (sub-module design first determine the main unit selection)

3. Design the Bluetooth module sketch according to the official reference manual or other information--nrf51822 the official reference manual provides 3 Bluetooth 4.0 three different designs, we choose the most suitable one:

4. Design the schematic diagram of the sub-module, download the specifications of the components in the sub-module, search the cost of each component component and purchase link (rough estimate cost), and use the corresponding file classification to save good

5. Finally, the whole system of the sub-module datasheet, purchase links, sketches, electrical characteristics and so on to clear the chest, next is the sub-module schematic design

3, sub-module symbols, package design and sub-module schematic drawing

Because ad itself with a part of the schematic library of components and packaging library, such as the basic resistor capacitance, commonly used flash, interface What, this part does not have their own design; On the other hand, we can download from the Internet other people designed schematic library and PCB packaging library, of course, you can also design the package yourself.

1. Create a new schematic library:

2. Take the common-yin tri-color lamp as an example to design a component: Click the Add button below the top left panel to add a component by selecting the line, shape, and pin components in the placement (e.g. each lamp in a tri-color lamp is a diode, a total of 2nd pins, 3, 1, 4 anode pins for RGB lamps The pin corresponds to the datasheet of the selected component). It is important to note that one end of the pin with the star is placed outside.

3.PCB Library is similar, to strictly follow the introduction of the component Datasheet size design!!! Through the wizard mode can be generated some common ~ in the custom design of the various pads are commonly used to change the properties of the pads into!

4. The corresponding component bindings for the PCB package in the schematic library:

4. With the design of sub-modules in accordance with the sub-module sketch design sub-module schematic, the following is the Bluetooth anti-lost Bluetooth module as an example of Bluetooth sub-module:

4, the use of sub-module schematic design of the general schematic diagram and compiled to generate engineering grid table

5. Generate PCB Diagram

1. Create a new PCB diagram with the same name as the schematic, and click Design->update PCB document XXXX. PcbDoc

2. According to the schematic diagram drag the relevant components in the PCB to the approximate position (I usually in accordance with sub-modules placed), placed after the manual wiring (do not do automatic wiring!!!) ）

2.1. When the selected components in the schematic switch to the PCB diagram, these components are highlighted, switch to click on the top of the document label, not the mouse to switch directly (in the case of side-reading)

2.2. Manual routing when switching between different traces: in the Microsoft Native Input method under shift+ space

2.3. All the ground pins are directly serialized on the pad near the properties of the ground

2.4. Turn green When you right-view the conflict and change the rules

2.5. Want to rotate any angle point edit--Move ...

2.5. Normal rotation 90 degrees: Left press and hold the component hit enter

2.6. Unified Font Adjustment: Select a component's letter--right-click the application (all letters automatically selected), modify text width and text height

2.7. Wiring needs to pass through the board in the crossing point put a hole, the attribute of net to the target net can communicate up and down (the size of the hole should not be too small, too large, general 25-12mil)

2.8 .....

3. Manual wiring after the placement of some of the vias (placing thermal expansion of the PCB copper to break), so that the effect is roughly as shown (board shape one will say):

4. Positive and negative copper and regional copper:

4.1. Select the face to apply copper to, such as the top Layer

4.2. Because the antenna part of the front and the surface can not be applied, so choose to let the part is not enough: placement----------------

4.3. Click: Place-and-polygon to apply copper to the area where copper is required

4.4. The reverse is also the same, finally remove the forbidden wiring area

5. Redefine the Board shape: general production when the board shape can be determined by the MECHANICAL1 layer or keep-out layer layers, the need for designers to PCB manufacturers point out. If the keep-out layer as a guideline only need to draw the area in this level, you can achieve the hole and other complex effects (but in the ad 3D display is not visible!) ); If the MECHANICAL1 layer is the same, you need to draw an enclosed area in the M1 layer (to make it easy to click on the layer below, right-clicking on the M-layer mode), and then selecting the enclosing area, design-and-board shape, as defined by the Selection object.

But using the M1 method is not easy to design the skeleton, there is a just to see (in fact, there is no egg) of the Hollow method (looks hollow): Place---polygon fill knockout, in the area where you want to open a polygon, modify its properties for board cutout.

6. Preview of Final effect

PS: go home tomorrow, work overtime today to write good ~ If you feel good, point a praise, let more people benefit ~
@beautifulzzzz 2016-02-02 continue~
E-mail:[email protected]

[Daily circuit diagram] 7, the design of a PCB process and details • Summary--to the layman's classmates or just into the students a macro view of the General circuit board design process of the article