Ringing Phone Light Flasher

  
I have received several emails asking how to connect up some lights so that when the phone rings, they flash. This is very useful in a situation were there is lots of noise and it is impossable to hear the phone, such as a workshop. Here is such a device.
Ringing Phone Light Flasher - schematic

# You may need to use a lower voltage zener for D1 and D2. # You can use a regular relay instead of a solid state relay, but the arcing accross the contacts may destroy it pretty quickly. # Be very sure that you have not accidentally connected 120V



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