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zhaoliang_0801_926809075 2006-10-7 08:16: 电容降压式电源原理及电路-2; 电容降压电源原理和计算公式这一类的电路通常用于低成本取得非隔离的小电流电源。它的输出电压通常可在几伏到三几十伏，取决于所使 ...; 4497 9 0 9

zhaoliang_0801_926809075 2006-10-7 08:15: 电容降压式电源原理及电路-1; 电容降压式电源将交流市电转换为低压直流的常规方法是采用变压器降压后再整流滤波，当受体积和成本等因素的限制时，最简单实用的方法就是采用电容降压 ...; 5674 9 1 10

zhaoliang_0801_926809075 2006-10-5 08:29: down-芯片中文手册-DS18B20; 5478 12 3 15

zhaoliang_0801_926809075 2006-10-5 08:27: down-芯片中文手册-max232; 5674 8 19 27

zhaoliang_0801_926809075 2006-10-5 08:26: down-芯片中文手册-AT89s51; 5598 10 0 10

zhaoliang_0801_926809075 2006-10-5 08:25: down-芯片中文手册-DS12887; 5047 9 1 10

zhaoliang_0801_926809075 2006-10-5 08:24: down-芯片中文手册-DS1302; 5659 10 6 16

zhaoliang_0801_926809075 2006-10-5 08:22: down-芯片中文手册-AT89S52; AT89S52; 4431 8 1 9

zhaoliang_0801_926809075 2006-10-5 08:19: down-芯片中文手册-AT24C02; 6152 7 12 19

zhaoliang_0801_926809075 2006-10-5 08:18: down-芯片中文手册-74ls245; 5464 8 1 9

zhaoliang_0801_926809075 2006-10-5 08:16: down-芯片中文手册-74LS138; 5573 9 1 10

zhaoliang_0801_926809075 2006-10-5 08:14: down-芯片中文手册-74ls21; 4967 10 0 10

zhaoliang_0801_926809075 2006-10-4 21:24: 老外教你练焊接; Help on soldering -Use a good soldering iron with fine pencil tip. Radio-Shack irons are good and reliable. -It is important to have acle ...; 5604 9 2 11

zhaoliang_0801_926809075 2006-10-4 09:30: down--串口调试助手; 串口调试的好软件，非常的方便串口调试助手.rar; 4742 7 0 7

zhaoliang_0801_926809075 2006-10-4 09:29: down--LCD1602芯片文档; 1602芯片的两片文档说明。; 5160 12 3 15

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