Battery
Batteries are an inexpensive and dependable power source. With enough batteries a reader can run for many days or weeks. Batteries are electrically very quiet (low ripple) since the electron flow is from a chemical reaction.
Batteries are an inexpensive and dependable power source. With enough batteries a reader can run for many days or weeks. Batteries are electrically very quiet (low ripple) since the electron flow is from a chemical reaction.