Hi, Does someone out there have a variable power supply circuit to be used in a magnetic choke utilized in a machine shop to hold a piece of metal against a grinding machine.. the PS should be able to supply a current of about 1 ampere and voltage of 50 to 150 volts dc. I've search the net but all i got was garbage. Any urls or links wil be most welcome. regards, Alan -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu