Quote:
Originally Posted by Drac0
This is the type of thing I've been looking at, but really have no idea if it's suitable for what I want to do.
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Hi Mark - this looks like it can control the voltage as well...
so say you had something like a 20vdc source, and you wanted to
reliably reduce it to 12...
(the verbage implies it can be adjusted between 3-20v)
I cant tell if it actually does what you want though...(and i'm pretty sure the -ve is common - so likely it wont)
If all you want to to is make it impossible to blow up a device by connecting it the wrong way - then the two original options i suggested are the easiest.
1 diode will basically stop any reverse current, and you would have to re-connect the battery properly before it works.
A bridge rectifier will work regardless of how you connect the battery.
you might lose ~1 volt across a diode- but using my scope as an example - it doesn't seem to affect performance.
In my ciggie lighter supply, there is a single 1N1004 diode and it easily runs the scope.