Phone Bell

The noisebridge phone bell gets an old phone to ring by a motor turning between the line that rings the bell.

For this reason, the motor needs to be uneven so the line can ring back and forth.

The whole thing is driven by a 12 volt power supply, and connected with a simple switch that transforms into a switch when *pressed*.

When the switch is pressed, the motor will turn, and all being well, the bells will ring like an old telephone.