Quartz clock pendulum movement teardown with schematic.
7:03
Magnetic Pendulum
12:57
#84. Pendulum Quartz Clock Teardown
25:06
240V solar lead acid LED head torch. (With schematic.)
24:23
Repair and Restoration of a Pendulum Clock c1910
30:18
How microwave body detectors work. With RF section schematic.
15:24
(unrelated 6) What makes a clock tick - exploring the Lavet motor
19:02
Internals of Quartz Clock Mechanisms
6:13