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Reply to "Smoke unit question MTH-ERR upgrade"

You can actually power your fan power off the smoke output as well, that way the smoke fan run with the smoke.  No relays in sight.

Truthfully, since the smoke motor only draws 30-40ma, you can do it with three components, a diode, 220uf 35V cap, and the LM7805T regulator.  40ma isn't worth wasting a switcher on.   I use the TO-220 regulator as it will run nice and cool with 40ma, the TO-92 low power one actually gets a little toasty with 40ma.

OGR Publishing, Inc., 1310 Eastside Centre Ct, Suite 6, Mountain Home, AR 72653
800-980-OGRR (6477)
www.ogaugerr.com

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