### 全局电路鸟瞰图
![circuit_overall](img/circuit_overall.jpg)

### 译码器电路示意图
![decoder_up](img/decoder_up.jpg)
![decoder_down](img/decoder_down.jpg)

### 数字屏电路示意图
![screen_left](img/screen_left.jpg)
![screen_right](img/screen_right.jpg)