This is only to power a noisy 9v guitar pedal, I didn't plan on making any connection to the case, should I? Never used one of these before...According to the data sheet, that will provide isolation up to 500V between input and output if case is connected to one of the grounds, so your proposed circuit should work.
What is the 9V output used for?
Don't see any particular reason to, unless it radiates switching noise into the system.I didn't plan on making any connection to the case, should I?
If you are referring to ground isolation...This is only to power a noisy 9v guitar pedal, I didn't plan on making any connection to the case, should I? Never used one of these before...
ThanksDon't see any particular reason to, unless it radiates switching noise into the system.
This is a multi pedal supply, powers 16 pedals total using multiple of the original schematic, have a couple that are radiating noise so adding these to isolate the grounds on the problem pedals (multiple tests using wall warts etc shows its a ground loop issue on this particular couple)If you are referring to ground isolation...
Use a 12-14vdc wall wart to drive the 9v regulator or the DC-DC converter, or a 9vdc wall wart to drive the pedal directly.
Usually the wall wart will have a transformer inside, so it will inherently have an isolated ground. If the wall wart has an internal step-down transformer, and has a two prong AC plug, then the output will be isolated from the input.Thanks
This is a multi pedal supply, powers 16 pedals total using multiple of the original schematic, have a couple that are radiating noise so adding these to isolate the grounds on the problem pedals (multiple tests using wall warts etc shows its a ground loop issue on this particular couple)
Why don't you think it will work? It's whole purpose is to isolate and the specs say it can...Usually the wall wart will have a transformer inside, so it will inherently have an isolated ground. If the wall wart has an internal step-down transformer, and has a two prong AC plug, then the output will be isolated from the input.
If the wall wart has a three prong AC input plug, then you can easily test for ground isolation with an ohm meter: Check for continuity from the Wall warts AC input "ground plug" to the barrel of the Wall warts output plug. If isolated, there will be NO continuity. (do this test with no power applied of course).
I doubt the DC-DC converter will help if ground isolation is what you are trying to achieve. In fact, it may cause more noise problems than it solves.
Isolate what?Why don't you think it will work? It's whole purpose is to isolate and the specs say it can...
It will remove one sort of noise and replace it with its own. Don't forget it is switching at 100kHz and that makes a lot of noise.Why don't you think it will work? It's whole purpose is to isolate and the specs say it can...