The CD-to-cassette adapter project involves making a device to allow a personal "walkman" type CD player to be used in an automobile cassette tape player. This device allows a CD player to operate through a cassette tape player. The CD output is used to drive an electromagnet mounted inside an empty tape cassette. When installed in the tape player, the varying magnetic field from the electromagnet induces a current in the tape heads. The device can be used to adapt a CD player to a car tape deck.