Thread: electronic powder despinsers

Originally Posted by zimmer

If you read my post I am not proposing either device as a solution, I am saying they just won't run a small load at any rate. The weak point of the whole set up is the Switched Mode PS. It is pointless interposing other devices before the SM PS. The ultimate solution is probably a regulated battery supply. This same topic was hounded to death on the Oz F Class forum recently but more focused on protecting expensive digital scales rather than dispensers.

Actually a switch mode power supply is usually a lot better than the old transformer for voltage stability. It continuously adjusts output to compensate for load and input voltage so is very stable. Because they switch in the order of 40kHz it is easier to smooth out the resulting voltage requiring smaller components. They are not as reliable as a basic transformer but are very easy and cheap to replace. Either way the additional voltage regulation in the device will cope with either. Things that are likely to have a greater influence of repeatable accuracy will be temperature variations, draughts, vibrations/movement and static charge build up.