一个15人表决电路，参加表决者为15人，同意为1，不同意为0，同意者过半则表决通过，绿指示灯亮，表决不通过则红指示灯亮。数码管显示赞成人数。-A 15-person voting circuit, voting for the 15 people who agree to 1, does not agree to 0, the consent of more than half the vote, the green indicator light, a vote is not passed then the red indicator light. The number of digital display support.