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Housing P2BBASP315/006082

但是這些都是一個仁者見仁，智者見智的問題;從不同角度考慮擺放位置都可以不一樣。其實自己畫了原理圖，明白所有元件功能，自然對元件擺放有清楚的認識（如果讓一個不是畫原理圖的人來擺放元件，其結果往往會讓你大吃一驚^_^）。

對于初入門的，注意模擬元件，數字元件的隔離，以及機械位置的擺放，同時注意電源的拓撲就可以了。

2）接下來就是布線。這與布局往往是互動的。有經驗的人往往在開始就能看出哪些地方能布線成功。如果有些地方難以布線還需要改動布局。

對于fpga設計來說往往還要改動原理圖來使布線更加順暢。布線和布局問題涉及的因素很多，對于高速數字部分，因為牽扯到信號完整性問題而變得復雜，但往往這些問題又是難以定量或即使定量也難以計算的。所以，在信號頻率不是很高的情況下，應以布通為第一原則。

3）OK了？別急，用DRC檢查檢查先。這是一定要檢查的。DRC對于布線完成覆蓋率以及規則違反的地方都會有所標注，按照這個再一一的排查，修正。

4）有些PCB還要加上敷銅（可能會導致成本增加），將出線部分做成淚滴（工廠也許會幫你加）。最后的PCB文件轉成gerber文件就可交付PCB生產了。（有些直接給PCB也成，工廠會幫你轉gerber）。

5）要裝配PCB，準備bom表吧，一般能直接從原理圖中導出。但是需要注意的是，原理圖中哪些部分元件該上，哪些部分元件不該上，要做到心理有數。

對于小批量或研究板而言，用excel自己管理倒也方便（大公司往往要專業軟件來管理）。而對于新手而言，第一個版本，不建議直接交給裝配工廠或焊接工廠將bom的料全部焊上，這樣不便于排查問題。的方法就是，根據bom表自己準備好元件。等到板來了之后，一步步上元件、調試。

Housing P2BBASP315/006082
DYNISCO PT130-2.5M PRESSURE TRANSDUCER*

WOMENS GAP DENIM JEANS SKIRT SIZE 14 35

RIDGID 87 ASCT CABLE TRIMMER WITH 6 DIES LINEMANS TOOL 

WOMENS BONGO FRAYED DENIM JEANS SKIRT SIZE 5 30

 PANDUIT PV14-P47-C 16-14 WIRE PIN CONTACT 100CT*

MINARIK SL52 REVERSING DC DRIVE SPEED CONTROL 115 VDC*

 PANDUIT PV14-P47-C 16-14 WIRE PIN CONTACT 79CT*

 ADALET XIHLFCX ENCLOSURE 3/4" HUB 

WOMENS CHARLOTTE RUSSE BLACK COTTON SKIRT SIZE SMALL 27

DARKROOM MEDICAL X-RAY SAFELIGHT INCANDESCENT 2058 

 NUMATICS L1SII452BP SOLENOID VALVE 5 PORT*

 ALLEN BRADLEY 42KB-D1LNSD-A2 PHOTOSWITCH 12-24 VDC*

 ALLEN BRADLEY 800T-16HC17KB6AX SELECTOR SWITCH*

WOMENS ANN TAYLOR RAMIE FLOWER LINED SKRIT SIZE 10 31

WOMENS CLAUDIA RICHARD COTTON FLOWERED SKIRT SIZE LG 38

WOMENS LANDS END ONE PIECE SWIMSUIT SIZE 8

NWOT GIRLS PLACE SIZE 10 JEANS ADJUSTABLE WAIST FLARE

WOMENS LIZ CLAIBORNE GOLF AUDRA SHORTS SIZE 4 30

WOMENS UNIONBAY DENIM CAPRI SHORTS SIZE 7 34

WESTINGHOUSE BAB3030H CIRCUIT BREAKER 3 POLE 30 AMP

 SQUARE D QOB220 CIRCUIT BREAKER 2 POLE 20 AMP

 SQUARE D OVERLOAD RELAY 9065 TR 5.5 1 AMP (12)

 SQUARE D OVERLOAD RELAY 9065 TR 5.5 1 AMP 

WESTINGHOUSE EB2050 CIRCUIT BREAKER 2 POLE 50 AMP

SIEMENS ITE ET-1565 CIRCUIT BREAKER 2 POLE 50 AMP

 EPPENDORF ENVIROTIPS PIPETS 2249042-7 8 pack

SQAURE D Q1370 CIRCUIT BREAKER 3 POLE 70 AMP

WOMENS VNTG CHIC BRITISH VOGUE CARDIGAN SWEATER NO SZ

WOMENS EVAN PICONE WOMAN PLUS SIZE 20W SKIRT

 CENTRICON MILLIPORE 4208 CENTRIFUGAL FILTER DEVICE

CINCINNATI ELECTROSYSTEMS 416-4-5-11 BOARD 

CINCINNATI ELECTROSYSTEMS 4161-4-5 BOARD 

 RELIANCE ELECTRIC 45C40 115V INPUT MODULE CONTROL*

 GE 15507 Q100CL/MC MINICANDELABRA SCREW BASE BULB*

POK-IT TOOL J02069 BANDING KIT FLANDERS CUTTING TOOL

 RELIANCE ELECTRIC 45C60 115V OUTPUT MODULE CONTROL*

 ALLEN BRADLEY 140-MN-0160 OVERLOAD MOTOR STARTER*

WISA DIAPHRAGM AIR PUMP 110 VAC SERIES 1000

 CORNING PYREX 3160 PETRI DISH SET 150 X 20 12 COUNT

JOHNSTONE H24-219 TEMPERATURE TESTER 

GASTECH GT-2400 PORTABLE GAS DETECTOR MONITOR MULTI GAS
NIP TYCO ELECTRONICS SL-2/0-3 HOLE SPLICE KIT

KIMAX 26500 4000 BEADED TOP TAPERED FLASK NARROW MOUTH

KIMAX 27060 BEADED TOP TAPERED FILTER FLASK NARROW OPEN

 ALLEN BRADLEY 1492-SP2C300 2 POLE CIRCUIT BREAKER

VWR SCIENTIFIC PRODUCTS 4000 ML FLASK TAPERED BEADED

 DIONEX 045230 DEUTERIUM LAMP AD20 ABSORBANCE DETECT

 PILOT PL-2230B COATED LENS HALOGEN DRIVING LAMP *

 NORTH SAFETY PRODUCT 8N30 NEOPRENE DRYBOX GLOVES

 NORTH SAFETY PRODUCT 8NY30 HYPALON DRYBOX GLOVES

 BIO RAD 223-9500 MICRO TEST TUBES 1.5ML

 ZYMARK 160-96R 96 TIP RACK ROBOTIC TIP 200UL

S & C LOADBUSTER LOADBREAK TOOL 5300R2 

 GE TEDST12 SHUNT TRIP FOR E150 CIRCUIT BREAKER ACES

 GE PRECISE EXZ 20835 HALOGEN LIGH BULB 12 VOLTS*

BRAINTREE SCIENTIFIC BSP 99 SYRINGE PUMP FOR PARTS

 GE 97670 12 VOLT 50 WATT BULB 2 PIN BASE HALOGEN

NWOT WOMENS LANDS END TANKINI SWIMSUIT TOP SIZE 10

NWOT WOMENS LANDS END TANKINI SWIMSUIT TOP SIZE 6

NWOT WOMENS LANDS END TANKINI SWIMSUIT TOP SIZE 10

NWOT WOMENS LANDS END TANKINI SWIMSUIT TOP SIZE 10

NWOT WOMENS LANDS END TANKINI SWIMSUIT TOP SIZE 6

WOMENS MIMI MATERNITY LINEN RAYON DRESS SIZE LARGE

MENS SOUTHPOLE SS DRESS SHIRT SIZE XL

WOMENS JUNIORS MY MICHELLE DRESS SIZE SMALL

 SIEMENS 3RT1015-1BF41 CONTACTOR 110 VOLT*

 SIEMENS 3RH1122-2AB00 CONTATOR 2 NO 2 NC*

NIM HAMAMATSU DEUTERIUM UV LAMP LIGHT*

 GE TEB111060 CIRCUIT BREAKER 1 POLE 120 VOLTS*

 ALLEN BRADLEY 400-DP40NJ3 CONTACTOR 40 AMP 3 POLE

HONEYWELL L91A 1078 PRESSURE CONTROL BOILER *

 GARDNER BENDER GDT-292A DIGITAL MULTI METER LCD

 ALLEN BRADLEY W36 HEATER ELEMENT*

ALLEN BRADLEY 800H-NP31 800H-1HVX7 800H-QP10G QP10R

 GE FXL PROJECTION LIGHT BULB 82 V 410 W QUARTZ HALO

 WESTINGHOUSE BAB2030H CIRCUIT BREAKER*

 HAMAMATSU H957-06 PHOTOMULTIPLIER MODULE PMT*

 WARNER ELECTRIC CBC-200 CLUTCH BRAKE TORQUE CONTROL

 THOMAS BETTS 1/2" COMPRESSION LUG 750 MCM CRIMP

DOBLE TR3100 DIGITAL CIRCUIT BREAKER TEST SYSTEM W/XTRA

GREENLEE LINEMAN 1985 HYDRAULIC HAND CRIMPER IN BOX 750

 LOUIS ALLIS RECTIFIER PRX-C446PB 30HP MOTOR *

MOTOROLA RADIUS P200 BATTERY CHARGER 6 PORT 

 SYLVANIA QTP2X40T12/120 RSN-B 2 LAMP BALLAST

 ADVANCE 71A5770-001D BALLAST 250W METAL HALIDE

 QTP2X59T8/277 ISN-A BALAST 277 VOLT T8 ELECTRONIC 

 BULLARD 20RT RATCHET HEADBAND RESPIRATOR MASK 

 REX HP 820K3.25 TABLETOP CONVEYOR CHAIN 10 FT

 APPLETON GRLB50 1/2" JUNCTION OUTLET EX PROOF*

 CUTTLER HAMMER BAB3030H CIRCUIT BREAKER 30 AMP 3 P

 HIRSCHMANN 731-365-106 PG9 GLAND SCREW GREY 

 PHILLIPS 35MRC16/IRC/FL36 LIGHT BULB 35 WATT

 CORNELL DUBILIER DCM302UO75BC2B CAPACITOR 

 TYCO ELECTRONIC RAYCHEM RDSS-IT-16 DUCT SEALING SYS

 LUFKIN NO 12 INSIDE CALIPER 4"

 ALLEN BRADLEY 800T-2TAR PUSHBUTTON STATION 

 LUFKIN NO 12 INSIDE CALIPER 5"

VINTAGE SHEET MUSIC CRAFT NOT COMPLETE

 BURNDY FCI GAR1726 GROUNDING CLAMPS 4AWG

 DAYTON 2E209 10 MINUTE PERCENT CYCLE TIMER 

 STARRETT 436P-1 OUTSIDE MICROMETER 0-1"

Housing P2BBASP315/006082