▍一个自动售邮票的控制电路。 用两个发光二极管分别模拟售出面值为六角和八角的邮票,购买者可以通过开关选择一种面值的邮票,灯亮时表示邮票售出。用开关分别模拟一角、五...
emitting diodes were simulated sold hexagonal and octagonal face value of the stamps, the purchaser can select a switch with a face value of stamps, stamp lights that were sold. Analog switch, respectively, of the iceberg, the Pentagon and one-dollar coins into. Representing the light-emitting diode...