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PCB·ǵɼԭ

ʱ:2013-7-23 8:24:54   :habao   Ժδ: 

һPCB·Ҫ

ѡõ·߲鼼ܣܹ߻߲Сģɵ·оƬijëģ¡ĵV/IԡоƬĹòĸԭǼⲢоƬ/״ص״淶״ֵб⣬Ȼб𱻲оƬDzȷоƬ״·ÿģڼӵ״ܽŵ߼״(Դء衢źŵ)֮ܽν硢֮߼硣ķë״ͨҪĶܹѺõ·ϵĸICĵ״ȡݿУȻͬëĵ·б⣬Ȼ׼ȷҳëλVIԲ鹦ģܸϣģ¡֡רġɱԼģģĵIJ顣ͨ̽ѱ߻ȡ΢Ļϣմݵ繤ѵëȷʱʵ⵽VIȴĹ淶߽б⣬ë

ڵѹΪDzĿ겻ֵֻ·ģҲܶģµ·ģΪһǵùģڲѡ˽ڵѹ鼼ܡͨԱĿʩҵѹɺȡڵĵѹӦֵ淶Ϣ⣬ԱбëλòdzҪ⣬еֲᡢ鿪ϵԼȸ鹦á

ɣ1Ӳģ飬ɱЯʽƬɡ䵥ƬںٿɱĿݵռݵ繤֤Щü£Ƭ·ҪռٿءãݽڲѡMCS-51ϵ8031Ƭѡ2764ΪROM6264ΪRAMоƬ·Ϊ74LS138ΪдͨѶѡMCl488MC1489RS-232CƽTTLƽĻ任ƬϵʱƵѡ6MHzͨѶѡ2400Ƭѡҵ취3дͨѶʱT1Ϊ취2趨SMOD=1ʱ̳F3HԵƬ߽󣬽Ÿɣѡ74LS24474LS245

ٿص·ҪɲTTLCMOS޵IJٿأѡ4SPST()DG211ģ¿أزٿ·74LS373˳ɡΪ֤DG211ʱڳ(OFF)״ٿ(10k)·ΪоƬʩӲźţѡ΢ͼ̵źŲٿأźݻ74ACT244Ϊ֤Ҫѡ4·취ΪֹģLCд壬ά·ռ·ȡоƬӦѡ˫ѹLM393źŲٿءĹĵͣ⾫ȸߣҿTTL߼ݡLM39374LS373ɵƬٿضݡѹD/A·VIнݵѹѡ8λD/A任MC1408оƬԴѹΪ+5V-12V֡ĵѹɺѹԴTL431ѡ˫·LM348ɡĻռA/D·ʩвݵռ·ѡøص輰·LM343Բеѹ棬ĵֵ任ΪA/DĻ·ܹõĵѹѡAD7574λαʽA/DĻ·任ʱΪ15S+5VԴ硣ĵѹѡVREF=-8VѹģΪ0~+|VREF|ٿоƬRD˷һͿA/D任2ģ飬ɱЯʽغͨпڽвٿأݵ繤ϸ֤ƬɼٿءռҵһüٿɱЯʽɡײͨѶ߲߹ò״VIԲڵѹֲᡢ鿪ϵԼȼҪģɡ

·߲鼼ܣ1߲ԭ߲ĸԭDzΪӡƵ·ϵıоƬ뼤һںٿռرоƬӦ״ֵͨصһ״ֵ淶״ֵ⣬Ȼб𱻲Ŀë״2鼼ܣ鼼Ҫֵ·߲顣ʵڱĵ뼶(ǰоƬ)˲̬ʹλҪ߻ͣԱʩӲ鼤ͼΪ˱֤Ե·ϵĽйò飬бҪǿĵ߼ƽбҪܹջĵ淶ļ(00-53/1)Ƽĺȫ淶ǵΪ240mAʱ200msڡͨʵ飬ܹϺõضԱĽһҲ֤˱ĵİȫԡ

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