Signals and slots work together to create digital signals. Signals are created when two or more electrical voltages are present at the same time.
Slots are simply spaces that allow for the passage of these signals.
When you want to send a signal, you put it into a slot. The slot then sends the signal out to where you want it to go.
When you want to receive a signal, you put it into a slot and the slot sends it to your device.
Slots can be used for a variety of things, such as sending and receiving data. Slots also come in handy when you need to create a signal in a specific place.
For example, if you want to create a signal that goes from your computer to your printer, you would put the computer into the first slot and the printer into the second slot.