Seriously cool! Any chance that you can share pictures and build information when you are d= one? dwayne At 07:23 PM 4/21/2015, David VanHorn wrote: >Yup. The main solenoid is wired like a doorbell buzzer, and the resonator >is a series LC across the switch. > >So the current starts flowing, and after a while the switch opens. The >current then has no choice but to charge the C in the resonator (about 0.1 >or 0.15uF through the 10 turn winding of the resonator. When the current >drops below the critical point, the contacts close, shorting out the >resonator series LC circuit. There is a secondary on the resonator of >about 1100 turns, which is responsible for the HV output. > >I just want it to work at 12V. Seems like not too big a demand. Total >power consumption is about 40W. > >Around the turn of the century, they made these things in 220V, 110V and >32V (for farm users) but that's when they were sold as "medical" devices. >Now it's my ESD tester. The 50kV output is impressive, and any >non-disposable electronics should stay well clear. An inverter would >almost certainly get fried as it's in the path of the return current. --=20 Dwayne Reid Trinity Electronics Systems Ltd Edmonton, AB, CANADA (780) 489-3199 voice (780) 487-6397 fax www.trinity-electronics.com Custom Electronics Design and Manufacturing --=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 .