Dozens of people turned out to see how they could use lifesaving equipment in emergencies.
A second defibrillator awareness day was held at Victoria Hall in High Street, Oakham, on Saturday.
Martin Fagan, national secretary of Community Heartbeat Trust, held demonstrations for those who visited.
A defibrillator is a lifesaving machine used on someone having a cardiac arrest to give the heart an electric shock.
Joyce Lucas, who helped organise the event, said: “The event went very well and it was well worth the effort.”
There are now four public defibrillators in the town, with a fifth one being planned for the new Co-operative in Braunston Road.