Curt Broadhead: Almost. A 12 Volt fan typically runs off 12 volts DC. Landscape lighting transformers put out AC. The quickest solution would be to get a small modular 12 VDC supply, as it would be very simple to wire up via the thermostat. While most thermostats are not designed to switch a lot of current, even at 12 volts, if the fan only uses 100 or 200 milliamps (0.100 to 0.200 amps), it should work fine. Much more than that and the contacts could "weld" as a result of arcing when they close. However, if you're handy with a soldering iron, and you really want to use that transformer, you could get a diode (half-wave rectification) or a bridge rectifier (four diodes arranged in a full-wave rectification configuration) and connect that such that it converts the AC to DC. It should work fine to run a DC fan, as they usually are tolerant of unfiltered and unregulated DC....Show more
Raven Purl: This seems reasonable as the fan and the lights will not be runn! ing at the same time , make sure you do not exceed the transformer rating
Foster Padgette: I don't know of an application for 12VAC to 1000VAC transformers, but if the power level is small, you could get 1000 volts from 12VAC by using a 120VAC-to-10,000VAC transformer from an oil burner. There are also transformers from old tube radios that have multiple secondaries, but finding the perfect one might be tough. It's common, for example, for a tube radio transformer to have a 120V primary and 6.3 volt filament winding, and 700+ volt HV winding. There is probably one out there with just the ratio you need, and some significant power handling capability....Show more
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