This time last week, I had very little experience with electrical circuits but I've spent a lot of time reading and researching and over the weekend I discovered this site. I used the
Latched Output - Momentary to Constant Output - Positive Input/Positive Output to solve a problem.
The wiring diagram was easy to follow but I did stumble a bit on the diode shown on the relay on the left. Initially, I didn't understand why the diode was needed but a quick Googling answered that question. A snippet of one answer... "You need the flyback diodes because at the instant you open the switch, a relay's inductance will try to maintain the current. Adding a diode will create an easy path for this current to circulate until the relay's inductance has lost all its energy."
This leads me to two questions that Google has not helped with, likely because I've failed to come up with the proper search term.
First, why is a diode not needed across the coil of the relay on the right? That relay isn't directly connected to a switch in the same sense that the relay on the left is but it is ultimately switched (the ignition in my case).
Second, can someone explain what is going on that causes the coil to try maintain the current?
Thanks in advance!