On 20 Oct 2016 at 21:50, Van Horn, David wrote:>=20 > Wire a 6V relay so that the normally closed contacts are in series > with the relay. Now add a shielded cable of about a meter, and > connect the shield to the battery side of the contacts, and the > center conductor to the coil side through a good capacitor that can > take some current, 0.1uF or thereabouts, and on the other end, > fabricate a small coil of 10-30 turns. Add a pushbutton in series > with the battery, and you have "Angry Bees".=20 >=20 > The pulses of current through the coil have significant energy, and > you can then probe around your system to see what's "sensitive".=20 Excellent, thanks for sharing. --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .