I've designed a darligton pair circuit to amplify +/- 10mA to +/- ten A . However it displaying only postive swing. I want negative swing far too. what should i do （使）演奏;（使）播放 Play the last few minutes in the online video once more. 把录像带的最后几分钟再放一遍。 When though is the last phrase https://edmundt441qhs0.wikifordummies.com/user