A man who authorities say used his computer to make fake $100 bills to buy lap dances at a strip club has pleaded guilty to counterfeiting charges, federal prosecutors said.

Strippers at Deja Vu in Nashville were suspicious of the bills and called police after Damon Armagost spent $600 of the fake money April 16, authorities said.

When officers arrived, Armagost first told them he got the money when he sold gold coins for $1,400 to an unidentified person.

U.S. Secret Service agents later determined that counterfeit bills with the same serial number had been passed in other parts of the country. When they went to Armagost's Smyrna home, about 20 miles southeast of Nashville, a family member told agents that an image of a $100 bill had been on a computer there.

Armagost then acknowledged that he had downloaded the image from the Internet and printed 14 of the bills, prosecutors said. He pleaded guilty Friday to manufacturing and passing counterfeit currency and has a sentencing date of Nov. 5.