add .svg to README.md

108e93e5 · 李川 · c2df2e21 · 108e93e5
--- a/README.md
+++ b/README.md
 # 说明
 ADC0809 模/数转换器
\ No newline at end of file
+# 原理图
+![ADC0809](https://www.codecode.net/engintime/Dream-Logic/Intel-classic-chips/ADC0809/raw/master/ADC0809.dlsche.svg)
\ No newline at end of file