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这个三极管能做开关用吗
2011-12-23 14:22
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- 42
- 7811
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大家帮我看看这个电路 到底是怎么回事
2011-12-17 10:38
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- 51
- 6890
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CR2032在使用中的问题?
2011-12-16 20:38
- 电源技术
- 35
- 9270
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7805接负载后电压降为2V左右
2011-12-29 08:57
- 电源技术
- 47
- 10990
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2
3
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