Introduction to protell 99se schematic and PCB

 

I,Schematic:

1. Note the electrical graphical symbols and encapsulation forms of commonly used protel99 components:

1) commonly used in the Resistance diagram of the RES1-RES4; pin encapsulation form: AXIAL translated into Chinese is the axis, from AXIAL-0.3 to AXIAL-1.0, the suffix number represents the gap between the two pad, measured in Kmil.

2) capacitor schematic commonly used name for CAP (non-polar capacitor), ELECTRO (polar capacitor); pin encapsulation form: non-polar capacitor for RAD-0.1 to RAD-0.4, the polarity capacitor is RB.2 /. 4 to RB.5/1.0, where ". 2 "is the Pad Spacing,". 4 "is the outer diameter of the capacitor cylinder.

3) the commonly used name in the potentiometer schematic is POT1 and POT2; pin encapsulation form: VR-1 to VR-5.

4) the commonly used components in the DIODE schematic are DIODE (Common DIODE) and diode schottky (symmetric DIODE) duide tunnel (tunnel diode) diode varctor (Variable-capacity DIODE) ZENER1 ~ 3 (Voltage Regulator DIODE). Pin encapsulation: DIODE0.4 and DIODE 0.7

6) The commonly used names in the transistor schematic diagram are:, NPN1 and PNP, PNP1; pin encapsulation form TO18, TO92A (Common Transistor) TO220H (High-Power Transistor) TO3 (high-power dington pipe)

7) The common names in the schematic of the FET are jfet n (N-channel junction FET) and jfet p (P-channel junction FET) N (N-channel enhanced Transistor) the encapsulation of the P (P-channel enhanced tube) pins of the MOS is the same as that of the transistor.

8) the commonly used name in the schematic of the bridge is BRIDGE1 and BRIDGE2, pin encapsulation form for D series, such as D-44, D-37, D-46, etc.

9) The CON series is commonly used in the single-row multi-pin socket schematic. From CON1 to CON60, the pin is encapsulated in the form of SIP series, from SIP-2 to SIP-20.

10) the commonly used name in the diagram of the dual-line direct plug-in component varies according to the function, and the pin encapsulation form DIP series.

11) commonly used name in the schematic diagram of the serial port type is DB series, and the pin encapsulation form is DB and MD series.

12) SMD Resistor

0603 indicates that the package size has no relationship with the specific resistance value, but the package size is related to the power. Generally, the package size is 0201 W.

0402 1/16 million

0603 1/10 million

0805 1/8 million

1206 1/4 million

The relationship between the shape size and encapsulation of the capacitor resistance is as follows:

0402 = 1.0x0.5
0603 = 1.6x0.8

0805 = 2.0x1.2

1206 = 3.2x1.6

1210 = 3.2x2.5

1812 = 4.5x3.2

2225 = 5.6x6.5

2. Common shortcut keys:

Q -- switch between the display unit mil and mm

P -- pop up the place menu

Tab -- start the Properties window of a floating Graph

End -- refresh the screen

Del -- delete the component from the vertex (1)

Ctrl + del -- delete the selected component (2 or more)

X + a -- cancel the selection status of all selected Widgets

Space -- rotate a floating widget 90 degrees

3. Common component libraries and other component libraries:

1) commonly used schematic library files:

Miscellaneous Devices. ddb

Dallas Microprocessor. ddb

Intel Databooks. ddb

Protel DOS Schematic Libraries. ddb

2) Common PCB Component Libraries:

Advpcb. ddb

General IC. ddb

Miscellaneous. ddb

3) Other Component Libraries:

Protel Dos Schematic 4000 Cmos. Lib (40. Series CMOS Integrated Block Library)

4013 D Trigger

4027 JK trigger

Protel Dos Schematic Analog Digital. Lib (Analog Digital Integrated Block Component Library)

AD series DAC series HD Series MC Series

Protel Dos Schematic Comparator. Lib (comparative amplifier Component Library)

Protel Dos Shcematic Intel. Lib (80 series CPU Integrated Block Component Library produced by INTEL)

Protel Dos Schematic Linear. lib (Linear component library) Example 555

Protel Dos Schemattic Memory Devices. Lib (Memory Component Library)

Protel Dos Schematic SYnertek. Lib (SY series Integrated Block Component Library)

Protes Dos Schematic Motorlla. Lib (Components Library produced by Motorola)

Protes Dos Schematic NEC. lib (Integrated Block Component Library produced by NEC)

Protes Dos Schematic Operationel Amplifers. lib (Operational Amplifier Component Library)

Protes Dos Schematic TTL. Lib (transistor Integrated Block Component Library 74 Series)

Protel Dos Schematic Voltage Regulator. lib (Voltage Adjustment Integrated Block Component Library)

Protes Dos Schematic Zilog. Lib (Z80 series CPU Integrated Block Component Library produced by Qi Ge)

II,PCBAspect:

1,The basic process for making PCB:

After importing the network table, set the mesh size-> draw a roughly closed physical boundary on the Keepover Layer (which can be adjusted later)-> draw a mechanical positioning hole (Aperture 3mm, the hole center is 5.08mm away from the edge of the Board) ---> place the components (first place the components at a fixed position related to the structure, such as connectors, after these devices are placed, LOCK them with the LOCK function of the software so that they will not be moved by mistake in the future. Then place special components and large components on the line, such as IC. Last placed on a small device) --> wiring (signal line and power line) ---> Finally, use copper to apply the remaining ground line (Specific 1) ---> View 3D effects and modify the improper position. until the entire board is completed.

Figure 1

Add or delete a tear pad: Tools --> tearsdrops appears. Select Add or Remove in the Action option:

2,Note:

Draw a signal line can be 8 mil wide line, through the hole is not too large, about 20 mil outer diameter, 12 mil internal diameter. The power cord and bottom line must be thicker. For example, the power cord can be 16mil wide. The power cord can be at a right angle, and the signal cable cannot.