I have a small and compact DC 9v 1amp power supply that's from something or another but it does not list what polarity it is. It has a barrel plug which would fit a Famicom, Super Famicom or model 1 Genesis and I'd like to use it with one of those which I know needs a negative center barrel plug, the + ---C--- -
I have a multimeter, but it doesn't seem to help me find out this information either. Luckily, I can take it apart, and I've taken photos of the board.
I know that vcc lines are red and ground is black, but it seems the red line goes to the side of the large capacitor that has the stripe, meaning that's negative. odd. I simply want to know how to tell what polarity the adapter is. if its center pin positive, I should just be able to desolder the two barrel plug wires and swap them correct?
Thanks for any help.
I have a multimeter, but it doesn't seem to help me find out this information either. Luckily, I can take it apart, and I've taken photos of the board.
I know that vcc lines are red and ground is black, but it seems the red line goes to the side of the large capacitor that has the stripe, meaning that's negative. odd. I simply want to know how to tell what polarity the adapter is. if its center pin positive, I should just be able to desolder the two barrel plug wires and swap them correct?
Thanks for any help.