[Aaron] has been wanting to build his own binary desk clock for a while now. This was his first clock project, so he decided to keep it simple and have it simply display the time. No alarms ...

Flip-flops are extremely simple electronic circuits, forming the basis of clock circuits, memory circuits, buffers, and shift registers. Through his dilly-dallying with digital logic, [Jeffrey ...

(the bridge plate between the two batteries is wired to "GND"). Why on earth would a simple digital clock circuit need a negative 1.5V? Even stranger is the fact that the clock does NOT appear to ...