Swapping tips on a power supply...

[Murph7355]

I have two power supplies (5V. One is 1.5A, the other 4A) and need to switch the tip for the 1.5A onto the 4A (long story why).

Both just have two wires going to the tip/PSU. Would simply cutting the tips off and splicing them work? And is there an easy way to see which pole I have running to the tip...?

[Plotloss]

One of the two cables should be marked but you need to check they are both centre positive, or centre negative before you start.

Which isn't a show stopper, you just need to reverse the input if they're different.

[sparkythecat]

Murph7355 said:

I have two power supplies (5V. One is 1.5A, the other 4A) and need to switch the tip for the 1.5A onto the 4A (long story why).

Both just have two wires going to the tip/PSU. Would simply cutting the tips off and splicing them work? And is there an easy way to see which pole I have running to the tip...?

If you look carefully on the PSU, you should see a depiction of the polarity in symbols, usually expressed as a letter C and a dot. If The C has a + sign next to it, the outer contact is positive and if the dot has a + sign next to it, then the inner conatct is poitive.

Something like this



If the two cores of the cable joining the PSU to the adapter plug are black and black with a white stripe. The black core is usually (but not always) -ve .

To be absolutely certain, you should check with a multi-meter

Edited by sparkythecat on Thursday 22 July 00:22

[Murph7355]

Thanks fellas.

Will have a bash tomorrow I think

[Murph7355]

All done. Thanks chaps.

(Looks like I may have a dead PSU for the Roku Soundbridge that just got pulled out).