Abstract: An assembly for causing a piece of jewelry to emit a flashing light in which a miniature circuit board has a pair of sockets presenting spaced pin-receiving openings. Cooperating with the openings is a jewelry mounting plate having a light-emitting diode mounted on the face thereof and having a pair of sharp stiff pins of small diameter connected to the diode and spaced to coincide with the socket openings. Mounted upon the circuit board is a module in the form of an integrated oscillator circuit having its input connected to a battery and its output connected to the sockets. The sockets provide frictional retention of the pins so that upon entry of the pins into the sockets, with a layer of clothing in between, the circuit board and mounting plate are mutually captive, with the pins completing a circuit between the light-emitting diode and the output of the oscillator for periodic flashing. The piece of jewelry is mounted upon the mounting plate integrated with the light-emitting diode.