搜索 - 科创

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不要用并口ISP下载线，我同学的爸爸是部队的，专门做单片机程序，他说用并口+74HC373做的ISP下载线很容易坏，寿命到不了一个月……图纸在下一个回复，我是从STC89C51的数据手册上抄的http...

不要仿真器，用电脑仿真最准确（proteus）可以在pudn下载。实验板买划不来，自己用STC89C51系列的单片机做就行了。电路很简单，只要电脑有串口就行。需要MAX232一片，6个电容，一个晶振，...

　　几乎所有的电子电路都需要稳定的直流电源，特别是在检定检修指示仪表时，除了要有合适的标准仪器外，还必须要有合适的直流电源及调节装置。传统的直流稳压电源已经具备了上述功能，且在稳压方面已经达到了很高的...

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