In my home, I have a mechanical doorbell chime that I would like to replace with a new digital chime (a chime with features like volume control, different tones, plays through a speaker). Is it possible to easily replace the chime without too much complications? If so, how can I do this?
As long as both require the same voltages you will be fine. If you are in the U.S. the line voltage to the transformer is standard house voltage (120 volts AC). The output voltage of the transformer to the chime is nominally 16v.
Yes. Even if your current doorbell is totally mechanical, with no electrical power, you can install a digital one by going wireless. Search the web for "wireless door chime" or "wireless doorbell". They are inexpensive but run on batteries, or pick one up at your local hardware or department store.