Connecting a 1.5-volt AA battery-powered quartz clock mechanism directly to 120 volt AC mains power seems like a bad idea. But this Chicago Lighthouse clock somehow makes it work, in a very wrong way.

Time flow:
0:00 Introduction
1:16 Unboxing
2:51 Quartz mechanism
5:06 First test
6:37 Opening the cover
8:19 Circuit analysis
13:15 Conclusion

#clock #electronic #teardown