Safety Alarm Clock

Step 3 Wiring

For my clock I saw that all of the buttons that had any influence on the alarm shared a common ground! If your clock is based on any sort of microprocessor, this will probably also be the case. Even if the relevan buttons are far apart, you may be able to find a common ground point for them.

you can use a multimeter which has a continuity mode to test if two points on the circuit are connected. Or if no continuity mode, measure resistance, low resistance (ie zero) means a connection.