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发表于 2009-3-25 11:06:40
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1) some diodes in the bridge are reversed. 2ap9 can be used for rectification, if the voltage / current ratings are sufficient.
2) 10vac rectified into about 13vdc.
3) the electrolytes have their polarity reversed.
4) both eletrolytic capacitors don't have sufficient voltage rating.
5) the zener should have a current limiting resistor in it and its polarity is reversed.
6) the 1m resistor may not be an error, depending on how much current you want out of the power supply.
7) if the transistor is functioning as a regulator, it shouldn't have the capacitor in its base.
8) if the transistor is functioning as a regulator, you need to check the resistor values for proper biasing.
9) 2ax31 is a pnp transistor and its polarity is reversed.
10) the diode in serial with the 1k resistor has its polarity reversed.
11) if the transistor is functioning as a regulator, it shouldn't have a dc blocking cap on its output.
1 整流桥里一些二极管接反，2ap9二极管，如果当前的电压不超过额定值是可以用的。
2 10v 交流 整流为 13v直流电压
3 电解电容极性接反了
4 两个电解电容的耐压值不够。
5 齐纳稳压二极管当前应该有限流电阻，电路里稳压二极管接反了
6 接1m的电阻不会出什么错误，只要是根据当前需要的供电要求而定
7 如果晶体管导通作为调整管，那基极不应该接电容
8 如果晶体管导通作为调整管，应该考虑适当的偏置电压用到的电阻值
9 2ax31是pnp管，而且极性反了
10 串接1k电阻的二极管接反了
11 调整管的c集接了电容，这样是没有直流输出的 |
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楼主
，【28楼】 wajlh 说了讨论这个没意思~~~
