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超声波发射电路请教!?

院士
2006-09-17 18:14:16     打赏
超声波发射电路请教!?



关键词: 超声波     发射     电路     请教    


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院士
2006-12-22 22:43:00     打赏
2楼
问 我用MCU产生40k方波,经过74HC00提升功率,但是只有5v,想升高电压,网上介绍都用中周,我想用比较器后,产生一个12v的40khz的方波,行吗? 1: 用变压器是最简单的办法也可用推挽放大器。 2: 我先用2110试试看!

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