Here's a way to rig up a liver quivering
BUZZCOIL that runs good on twelve volts.
 They find much use on early spark plug
ignition systems , flame thrower exhausts
, and testing your bladder  . The relay in
question is a 12V NC/NO  . The coil is a
12V with internal resistor for space
requirements . Follow the "Essentials " link
at upper left to find all the parts in one box


THE BOZZ COIL  A NEARLY FREE BUZZCOIL