You need to unblock this content by setting your broser.
ブラウザーはこの内容をブロックしないように設定してください。

INFO:
Hello Sirs! I have a project but I cannot where I did go wrong. I have to build a clock timer using 74192. MM:SS clock where it should count 59:59. But when...
74192 clock down counter | All About Circuits