These are switch mode power supplies which mean the output is regulated to 9v and the capable output current is much higher 1000ma.
Arduino 12v wall wart.
Yeah you want to connect your wall wart to the 5v pin and leave the vin pin disconnected.
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My cat broke my live nudes neon sign years ago so i can t experiment with that now.
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Hey guys i am brand new to this arduino type stuff and am planning on buying an arduino uno tomorow.
Along with the uno i would like to buy a wall adapter to power it but the only problem is that i don t know exactly which wall adapter to get and i would like to know exactly which wall adapter to get.
If it is 12vdc from the wall wart powering the neon device then you switch the 12v using a relay or possibly a logic level mosfet.
Use google search box in upper right side of this page.
High quality switching wall wart ac to dc 9v 1000ma wall power supply manufactured specifically for electronics.
The output is center tip positive 5 5mmx2 1mm connector.