Twist Tie Wire Joule Thief.ASF
This shows a Joule Thief inductor coil made out of just plastic coated steel twist tie wire. There is no ferrite toroid core used to make the inductor in this video but one could be used. I also show a Slayer Exciter hooked up to the circuit. The device is running on one AA battery at less than 20mA. The spools of wire can be found in gardening or hardware stores and is very inexpensive. It would only be appropriate for some circuits because it is magnetic and does not conduct electricity as well as copper wire.