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来自Jack's Lab
2014年11月25日 (二) 18:40Comcat (讨论 | 贡献)的版本

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目录

1 开发手记

1.1 PIN

Atmega328p-TQFP32-pin.jpg


W5100-pinout.jpg



1.2 PCB

打样工厂工艺限制:
  • 最小线宽:6mil
  • 最小间距:6mil
  • 最小阻焊桥宽:0.1mm
  • 板厚孔径比:8:1
  • 钻孔孔径:0.3mm--6.35mm
  • 成孔孔径:0.3mm--6.30mm
  • 孔径公差:0.08mm
  • 外形尺寸精度:± 0.2mm
  • 字符字宽不能小于0.153mm(6mil),字高不能小于0.811mm(32mil), 宽高比最好为5的倍数,例如:字宽0.2mm 字高则为1mm


Eagle 层:
  • 17 Pads --> DIP 件焊盘
  • 18 Vias --> 过孔
  • 20 Dimension --> PCB 板外围形状尺寸
  • 21 tPlace --> 顶层丝印
  • 23 tOrigins --> 器件定位原点,隐藏后就无法移动器件
  • 25 tNames --> 器件Name
  • 29 tStop --> 阻焊层
  • 31 tCream --> 焊膏层
  • 39 tKeepout --> 器件最小需要的空间范围



1.3 RF TX

简单的使用声表谐振器的发射电路图:

Rf-tx-saw.png


L1:0.8mm 绕 3mm 圆柱 4.5 圈

减小8050基极电阻的值,通讯距离会加大 50% 甚至更远,但会导致电路工作状态不稳,有时发射失败

12V 供电的情形下,距离可达 800m


发射时,射频信号波形:

RF-TX波形.png



1.4 RF Decode

上图射频波形,有高频振荡的地方,表示高电平,否则为低电平,则:

 1001 1111 0010 1111


---

433门磁解码:Pulse_Length = 300,前导:1:31

 0110 0101 0110 0110 1000 1110



1.5 Power

宽电压输入、至少 90% 转换效率的降压芯片 MP2307 典型应用电路:

Power-mp2307.png


R1 的大小,控制输出电压的值



1.6 BOM

Part       Value               Device                        Package               Description                                                             
ANT1                           SMA--KE                       SMA-KE                SMA 50 Ohm
ANT2                           SMA--KE                       SMA-KE                SMA 50 Ohm
C1         100uF               CAP_POLF80                    NIPPON_F80            Capacitor Polarized                                                     
C2         100uF               CAP_POLF80                    NIPPON_F80            Capacitor Polarized                                                     
C3         10nF                CAP0603-CAP                   0603-CAP              Capacitor                                                               
C4         100nF               CAP0603-CAP                   0603-CAP              Capacitor                                                               
C5         3.9nF               CAP0603-CAP                   0603-CAP              Capacitor                                                               
C6         22uF                CAP_POL1206                   EIA3216               Capacitor Polarized                                                     
C7         22uF                CAP_POL1206                   EIA3216               Capacitor Polarized                                                     
C8         22uF                CAP_POL1206                   EIA3216               Capacitor Polarized                                                     
C9         100nF               CAP0603-CAP                   0603-CAP              Capacitor                                                               
C10        100uF               CAP_POLF80                    NIPPON_F80            Capacitor Polarized                                                     
C100       100nF               CAP0603-CAP                   0603-CAP              Capacitor                                                               
C101       100nF               CAP0603-CAP                   0603-CAP              Capacitor                                                               
C102       100nF               CAP0603-CAP                   0603-CAP              Capacitor                                                               
C103       100nF               CAP0603-CAP                   0603-CAP              Capacitor                                                               
C104       100nF               CAP0603-CAP                   0603-CAP              Capacitor                                                               
C105       100nF               CAP0603-CAP                   0603-CAP              Capacitor                                                               
C106       100nF               CAP0603-CAP                   0603-CAP              Capacitor                                                               
C107       100nF               CAP0603-CAP                   0603-CAP              Capacitor                                                               
C108       100nF               CAP0603-CAP                   0603-CAP              Capacitor                                                               
C109       100nF               CAP0603-CAP                   0603-CAP              Capacitor                                                               
C110       12pF                CAP0603-CAP                   0603-CAP              Capacitor                                                               
C111       12pF                CAP0603-CAP                   0603-CAP              Capacitor                                                               
C112       100nF               CAP0603-CAP                   0603-CAP              Capacitor                                                               
C113       100nF               CAP0603-CAP                   0603-CAP              Capacitor                                                               
C114       100nF               CAP0603-CAP                   0603-CAP              Capacitor                                                               
C115       100nF               CAP0603-CAP                   0603-CAP              Capacitor                                                               
C200       15pF                CAP0603-CAP                   0603-CAP              Capacitor                                                               
C201       15pF                CAP0603-CAP                   0603-CAP              Capacitor                                                               
C202       100nF               CAP0603-CAP                   0603-CAP              Capacitor                                                               
C203       10uF                CAP_POL1206                   EIA3216               Capacitor Polarized                                                     
C204       100nF               CAP0603-CAP                   0603-CAP              Capacitor                                                               
C205       100nF               CAP0603-CAP                   0603-CAP              Capacitor                                                               
C206       100nF               CAP0603-CAP                   0603-CAP              Capacitor                                                               
C207       100nF               CAP0603-CAP                   0603-CAP              Capacitor                                                               
C208       100nF               CAP0603-CAP                   0603-CAP              Capacitor                                                               
C209       10uF                CAP0805                       0805                  Capacitor                                                               
C210       10uF                CAP0805                       0805                  Capacitor                                                               
C211       10uF                CAP0805                       0805                  Capacitor                                                               
D1         S4                  DIODESOD                      SOD-323               Diode                                                                   
D2         S4                  DIODESOD                      SOD-323               Diode                                                                   
D3         S4                  DIODESOD                      SOD-323               Diode                                                                   
D4         S4                  DIODESOD                      SOD-323               Diode                                                                   
D5         1N4007              DIODESMB                      SMB-DIODE             Diode                                                                   
D6         SS14                DIODESOD                      SOD-323               Diode                                                                   
D7         SS14                DIODESOD                      SOD-323               Diode                                                                   
ETH        HLJ6115ANL          HLJ6115ANL                    HR911105A                                                                                     
IC1        ATMEGA168           ATMEGA168                     TQFP32-08                                                                                     
IC2        W5100               W5100                         LQFP-80               WIZnet W5100                                                            
J1         POWER_JACKPTH       POWER_JACKPTH                 POWER_JACK_PTH        Power Jack                                                              
JP         M04X2               M04X2                         2X4                                                                                           
JP1                            M06SIP                        1X06                  Header 6                                                                
JP2                            M06SIP                        1X06                  Header 6                                                                
JP3                            M081X08                       1X08                  Header 8                                                                
JP4                            M081X08                       1X08                  Header 8                                                                
JP5                            M04PTH                        1X04                  Header 4                                                                
JP6                            M03PTH                        1X03                  Header 3                                                                
JP7                            M04PTH                        1X04                  Header 4                                                                
JP9                            M07                           1X07                  Header 7                                                                
L2         10uH                INDUCTORCR54                  CR54                  Inductors                                                               
LED_ETH_RX                     LED0603                       LED-0603              LEDs                                                                    
LED_ETH_TX                     LED0603                       LED-0603              LEDs                                                                    
PWR_IC     MP2307              MP2302                        SOIC8                 MP2302                                                                  
PWR_LED                        LED0603                       LED-0603              LEDs                                                                    
R1         10K                 RESISTOR0603-RES              0603-RES              Resistor                                                                
R2         6.8K                RESISTOR0603-RES              0603-RES              Resistor                                                                
R3         26.1K               RESISTOR0603-RES              0603-RES              Resistor                                                                
R4         10K                 RESISTOR0603-RES              0603-RES              Resistor                                                                
R100       1K                  RESISTOR0603-RES              0603-RES              Resistor                                                                
R101       1K                  RESISTOR0603-RES              0603-RES              Resistor                                                                
R102       1K                  RESISTOR0603-RES              0603-RES              Resistor                                                                
R103       1K                  RESISTOR0603-RES              0603-RES              Resistor                                                                
R104       1K                  RESISTOR0603-RES              0603-RES              Resistor                                                                
R105       49.9                RESISTOR0603-RES              0603-RES              Resistor                                                                
R106       49.9                RESISTOR0603-RES              0603-RES              Resistor                                                                
R107       49.9                RESISTOR0603-RES              0603-RES              Resistor                                                                
R108       49.9                RESISTOR0603-RES              0603-RES              Resistor                                                                
R109       300                 RESISTOR0603-RES              0603-RES              Resistor                                                                
R110       12K                 RESISTOR0603-RES              0603-RES              Resistor                                                                
R111       1M                  RESISTOR0603-RES              0603-RES              Resistor                                                                
R112       10K                 RESISTOR0603-RES              0603-RES              Resistor                                                                
R113       10K                 RESISTOR0603-RES              0603-RES              Resistor                                                                
R114       1M                  RESISTOR0603-RES              0603-RES              Resistor                                                                
R200       1K                  RESISTOR0603-RES              0603-RES              Resistor                                                                
R201       0                   RESISTOR0603-RES              0603-RES              Resistor                                                                
R202       10K                 RESISTOR0603-RES              0603-RES              Resistor                                                                
R203       10K                 RESISTOR0603-RES              0603-RES              Resistor                                                                
RX_IC      RXB6-MODULE         RXB6-MODULE                   RXB6-MODULE                                                                                   
S1         SMD                 SWITCH-MOMENTARY-2-SMD-1101NE TACTILE-SWITCH-1101NE                                                                         
T1         SI2302              -MOSFET-N-SMD                 SOT23-3                                                                                       
W25Q8      SPI_FLASH-X25XXSMD1 SPI_FLASH-X25XXSMD1           SO08-EIAJ             8pin SPI Flash series x25xx
X1         16MHz               CRYSTALHC49US                 HC49US                Crystals                                                                
X2         25MHz               CRYSTALHC49US                 HC49US                Crystals                                                                



2 测试记录

* A1 号门磁,315

环境:大雪科大住所,发收间距离5米左右

发射器贴木质门框上,收到的信号很微弱,狗狗没法辨识

拿手上,信号则很强




















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