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描述
一个微型电池充电器5V 800mA 它使用 MCP7386 (U4) 为电池充电,使用 LTC3402EMS (U2) 将电压转换为高达 5V。 我决定将它用于使用树莓派零的小型凸轮记录器。 该连接器提供以下电压: 1:+Vbat,电池正极 2:SW1,外部开关端子,用于将电池与升压转换器分离,从而关闭电源。它连接到与 Vbat 相同的终端。 3:SW2,外部开关的另一端。 4:+5V升压转换器的输出电压 5:地 6:接地 二极管 D1、D2、D5 用于显示电池的状态。 连接器 J4 是一个微型 USB 连接器,用于提供电压和为电池充电。 物料清单如下: "RefDes","值","模式" "C19","100nF","CAP_0603" "C20","470nF","CAP_0603" "C21","100nF","CAP_0603" "C22","10uF","CAP_1206" "C23","100u","CAPAE-5.3x5.3h7" "C24","100nF","CAP_0603" "C25","100nF","CAP_0603" "C27","100u","CAPAE-5.3x5.3h7" "C28","100nF","CAP_0603" "D1","","DIO_0603" "D2","","DIO_0603" "D3","","SMB" "D4","","DIO_0603" "D5","","DIO_0603" "D6","","SMB" "D7","","SMB" "J4","","934" "J5","","HDR-1x6T/2.54/15x2" "L1","","SRP7030F" "Q1","","SOT23" "R13","6.19k","RES_0603" "R14","7.3k","RES_0603" "R15","10k","RES_0603" "R16","6.19k","RES_0603" "R23","6.19k","RES_0603" "R24","2.2k","RES_0603" "R25","1.19k","RES_0603" "R26","0R","RES_0603" "R27","10k","RES_0603" "R30","10k","RES_0603" "R31","6.19k","RES_0603" "R32","6.19k","RES_0603" "R33","6.19k","RES_0603" "R34","6.19k","RES_0603" "TP1","","测试点" "TP2","","测试点" "TP3","","测试点" "U4","","SOJ-16/8.65x1.27" "U5","","MSOP-10" PCB+原理图
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工业现场经常用到的 RS485 通信,原来它的收发机制是这样的
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