如何做一个合格的电子工程师

1TTLTTL2RS2323RS485/4224121274073740447400574LS5736ULN2003774LS244874LS240974LS2451074LS138/23811CPLD(EPM7128)12116113max69114max485/7517615mc148916mc148817ICL232/max2321889C511231)2)3)4567LED8892N5551101231eeprom2I/O3ADDA4LEDmax7129121)2)3)31)2)1231231)TTL―2)TTL―3)TTL―4)TTL―LED85)―6)―41)―2)TTL―5CPU61)2)3)4)1.2.5)6)7)8)1.2.1RS4222RS2323481)DC122)RS2323)43”84)5)4331”81)DC5V2)RS2323)311843434)5)6)5PCL725MOXAC168P1)DC5V2)PCL725/MOXA8RS2321.PCL725DB372.MOXAC168PDB623)685.083.814)103.815)RS2321.LED2.4RS2324TXRX03.4.DB9C51N80%30005000……..1)2)3)1)2)RS232/485/canbus//USB3)TTL4)4~20ma0~10ma0~5V1)RS232/485/canbus//USB2)TTL3)4~20ma0~10ma0~5V4)LED5)6)1)8512)32armatmel51armarmarmUSBARMatmelARM9115515151I/OA/DD/AARMARM5151I/OA/DD/AA/DD/AARMI/OI2CI/OA/DD/ASPILEDMAX7219RAMEPROMA/DD/A515121.atmel89C51winbond78E52philipsISP2.max691/ca1161DS1832MaxDSIMPmax691max691ca116151PDFflashgetpdfpdf://……1.2.MCS-513.......PDFadsl……2.12.27474://://–6=125533TTL0-11-027407–6=125518DC30V39mA87406374LS57374LS373–874LS373=12917174LS573……RAMmovx@dptr,Ans12M1usmovP0,A;clrLEsetbLEclrLE;LE0-1-074ls57374LS373PCB474LS244–––)3V15V742)1/201/213)1=0=0V4)1TTL5)100K6)CD406014/74://(SSR)MC14132003ULN20037ULN20088ULN2003=148212ULN20082.5I/O1)2)1)TLP521-1/TLP521-2/TLP521-4124HP)4N25/4N35motorola)6N136HP~20mATLP521119200tlp521-10.7~14N25/4N3536N13641..62.6.141)=02)=13)4)8054740741bece0V0bece5VIB×IbeIceVceVce0.1VPNP2N555140mALED24V2.6.27407ULN2003PCB1~27407ULN20032.TTL3.4.RS2325.RS4222.62.72.82.92.102.112.122.132.142.152.162.17.521)2)2232TTL5V1NPNB2N55510V0.1V2N55515V3K2.62.6.11)2)3)4)5)220u/50V50V220u2.6.11.220u/25V0.1u0.01u0.1u0.01u2.5553.max232max23201.u2.6.225V100u.72.7.12.7.1.110WCCTV1/8W7LEDLEDLED20mALED2×62640mALed20mALEDLED2.7.1.21nN=102502103……102=10*10210001K502=5K104=10*104pfpf1u=1000000pf104=100000pf=0.1u222.7.1.3sipn5021039sip98851P0740751P02.7.1.41LEDLEDLED82.7.2axial0.4axial0.6axial0.8axial0805protelPCB-123ISAPCI34CPU5PCB[]2.8.121COM2normalopenNO3normalcloseNC2PCBAC24VAC220VidecOMRONfujitsunationalOMRON50DC5V/DC9V/DC12V/DC24V/SPST/SPDT/DPDT/?DC30V/1ADC30V/2AAC110V/0.2APCBDIP16DIP16DIP168DIP162.8.2445100300AC220VAC380V21DC5VDC12VDC24V2AC220V/1A/2A/4A4AOMRON2A8.9PCB27805AC220V100KhzAC220VDC5V78051E9V12V9V12V2321/W24Dc5V/0.25A1.25W78055050%6WDc5V/0.25A3V6V6×1.48.4VAC6V/6W78nationalsemiconductorLM780XMC780X278LM2930LM2937LM2940CLM299044NIC35%7550mVat5Voutputtypical5mVDCDCDC-DC2.103.3V5VDC5VDC3.3VDC5V3.3V1.8VARM3.3VARM1.8VarmcoreMAXIMLINEARTImaximmaximPowerSuppliesandBatteryManagementSwitchmodeDC-DCPowerSupplies408IsolatedPowerSupplies22Low-DropoutLinearRegulators75WhiteLEDDrivers13Low-SideMOSFETDrivers14High-SideMOSFETDrivers6ORingMOSFETControllers2BatteryChargers36BatteryProtectors,SelectorsandMonitors17Regulator+ResetCircuits4CurrentSenseAmplifiers22LCD/ECB/CCFLDisplayBiasSupply87ALSOSEE:Hot-SwapandPowerSwitchingALSOSEE:VoltageReferencesSwitchmodeDC-DCPowerSuppliesnstep-downstep-upphilipsDC24VDc5V/2ADC/DCmaximmaximMAX724LT10762150uHDc5VDC5VDc10VDC40Vmax7245ADC5VMaxim724=153160LT1076=157742ARMTITPS767D318=1221225V5VDC/DCDc12V/DC5V500mA30.11TIMCMAXIMLINEARmax7219MAXIMMAX7219CNG0323PYMAXIMMAX7219CNGCNG721903200323235252---511051keilC1248C51protel99se--LED-RS232/RS422/RS485-protel994PCBDOSprotel3.16-PCB-C51-BBS100--5×87×165280012002nnARMCPLD/FPGA510LOTUSnotesIBM300IBM100010010GE200GE[zhen5241],