以下网址可以下载超声波测距电路图http://www1.upweb.net/index272-img/showlog.php?id=10588&partname=http://218.16.124.196/bbs/bbs_content.jsp?bbs_sn=127362&bbs_page_no=58&bbs_id=1000http://www1.upweb.net/index269-img/showlog.php?m=12&y=2017&id=10588