SparkFun Electronics Comments

Dickcheney on TOL-00298 - Wall Adapter Power Supply - 9VDC 650mA

2016-04-01T05:18:59-06:00

I usually make it a rule to only leave an adapter plugged in unattended (to charge a battery or power something that I want to keep on) if it is UL listed.

tweedius on TOL-00298 - Wall Adapter Power Supply - 9VDC 650mA

2014-05-20T08:24:32-06:00

Just bought the “new” version of this and it died in a little over 3 months. When I say died I mean that it turned into a sine wave generator peaking at ~14V.

Customer #522981 on TOL-00298 - Wall Adapter Power Supply - 9VDC 650mA

2014-04-24T10:50:30-06:00

If possible, ship with order 957252

Customer #168373 on TOL-00298 - Wall Adapter Power Supply - 9VDC 650mA

2012-07-28T15:56:59-06:00

I bought it, and finally tested it. Found out the unit is cracked. The screw isn’t holding it together, but it just lightly is snapped in. Won’t buy this anymore. The one from Amazon was same price, no issues!

cmlburnett on TOL-00298 - Wall Adapter Power Supply - 9VDC 650mA

2012-05-23T21:13:42-06:00

Ditto, and the metal pin was left in the socket. One of the few times I’ve intentionally had to test the insulation on my pliers.

Customer #302270 on TOL-00298 - Wall Adapter Power Supply - 9VDC 650mA

2012-03-14T21:44:55-06:00

It Says Center-positive 5.5x2.1mm barrel connector

IllogicGate on TOL-00298 - Wall Adapter Power Supply - 9VDC 650mA

2011-12-03T14:29:15-07:00

Try a 10K pull-down resistor to ground, might help stabilize the sensors by blocking some of the floaty-ness. :)

Customer #196151 on TOL-00298 - Wall Adapter Power Supply - 9VDC 650mA

2011-10-01T15:37:03-06:00

These make the best guitar pedal adapters! They take up one plug slot (very convenient) and they put out very clean voltage. If you play electric guitar I would recommend to buy a handful of these. Before you use them, remember to reverse the wires because you need negative tip with pedals. It takes 5 minutes to remove the cover and switch the wires, then you are good to go.

windrago on TOL-00298 - Wall Adapter Power Supply - 9VDC 650mA

2011-09-19T22:01:22-06:00

Does this work with Arduino 2009 or fries it?

JGG on TOL-00298 - Wall Adapter Power Supply - 9VDC 650mA

2011-09-19T10:46:22-06:00

Are the “guts” available just as a circuit board (populated), preferably with some mounting holes? If not, suggestions on where to buy something similar, or maybe make the schematic available? I’d like to use it as part of an embedded system.

Gizmo E. on TOL-00298 - Wall Adapter Power Supply - 9VDC 650mA

2011-08-21T17:45:21-06:00

Yep, mine did the same thing. Except mine actually cracked the whole faceplate in a couple places as well.
Reattached the prong, and still had to throw away adapter… put out 9V and seemed to short whenever a load was applied lol.
Still, the price is pretty hard to beat..

Tim R on TOL-00298 - Wall Adapter Power Supply - 9VDC 650mA

2011-05-11T20:56:36-06:00

Be careful with what outlets you plug it into. The prongs can be pulled out if the outlet applies too much pressure. The retail version I purchased from Micro Center last weekend ended up this way.

Ivan747 on TOL-00298 - Wall Adapter Power Supply - 9VDC 650mA

2011-04-26T19:07:25-06:00

Depending on the regulator: if it is a linear regulator (and it probably is) then no, the maximum output would be about 650mA. What a linear regulator does if to act as a series resistor, dropping 9-3.3V which equals 5.7V as heat. You might have used a resistor to drop the voltage going into an LED, tis works almost the same.
The difference between a regulator and a resistor, in this aspect, is that a regulator knows the current flowing and adjusts itself to compensate the difference. So basically is behaves like a smart resistor that adjusts it’s resistance based on the current flowing through it.

Young Maker on TOL-00298 - Wall Adapter Power Supply - 9VDC 650mA

2011-03-07T07:21:09-07:00

Solder on some dual conductor stranded wire between the connector and the cord, observing polarity :).

Customer #159066 on TOL-00298 - Wall Adapter Power Supply - 9VDC 650mA

2011-03-02T17:43:02-07:00

Is it possible to order this with a longer cord? The length works for what I need sometimes, but I could use a couple extra feet for some of the powered chairs I use these on.

UnderTwoBridges on TOL-00298 - Wall Adapter Power Supply - 9VDC 650mA

2011-02-28T13:29:20-07:00

Supposedly in the Quick Start Tutorial, It says that it’ll work with the Arduino Uno down in the Full Bio section

timballas on TOL-00298 - Wall Adapter Power Supply - 9VDC 650mA

2011-02-21T03:09:00-07:00

Man, I love you guys at Sparkfun. I really love the Phillips head screw and easy access tabs! It’s also great that you don’t squirt these things full of silicone or glue or whatever crap most have in them.

MatthewFarrow on TOL-00298 - Wall Adapter Power Supply - 9VDC 650mA

2011-02-09T14:57:47-07:00

15W 9V Adaptor
Claims to be UL and cUL approved. Not sure about CSA.

Maragnus on TOL-00298 - Wall Adapter Power Supply - 9VDC 650mA

2011-01-25T09:41:07-07:00

After a 3.3V voltage regulator, can I safely run this at a higher current? Say at 1A?

rfordh on TOL-00298 - Wall Adapter Power Supply - 9VDC 650mA

2011-01-05T14:47:17-07:00

That seems strange that your project isn’t working with a floating ground. What kind of sensors are you using?
If you really need a true ground, just connect a ground pin on your Arduino to ground directly. You don’t need the power supply to do it for you.

rfordh on TOL-00298 - Wall Adapter Power Supply - 9VDC 650mA

2011-01-05T14:38:42-07:00

The product description says “Center-positive 5.5x2.1mm barrel connector.”

BricoGeek on TOL-00298 - Wall Adapter Power Supply - 9VDC 650mA

2010-11-12T10:44:37-07:00

European plug please!!!

Scrubb on TOL-00298 - Wall Adapter Power Supply - 9VDC 650mA

2010-03-20T16:50:38-06:00

What is the configuration of the barrel connector? polarity/hot/etc? Is there a manual or schematic blow up?

SteveL on TOL-00298 - Wall Adapter Power Supply - 9VDC 650mA

2010-03-15T13:27:26-06:00

Could I use this to power an Arduino?

g123456 on TOL-00298 - Wall Adapter Power Supply - 9VDC 650mA

2009-08-24T16:54:54-06:00

This is not UL listed or CSA approved. Might be important if you need something that is.
Does anyone know where I can find a safety-certified version of a 9V >500mA adapter?

Aerodyno on TOL-00298 - Wall Adapter Power Supply - 9VDC 650mA

2009-08-16T15:33:10-06:00

And by three ‘pins’ I meant “prongs” … you know, the ones that go in the wall socket. Connect negative to ground, so your arduino gets a true ground instead of a floating one.

Aerodyno on TOL-00298 - Wall Adapter Power Supply - 9VDC 650mA

2009-08-16T15:06:59-06:00

If you could make one that has three pins, so the negative output is connected to ground, that would be awesome. Right now I’m having issues with some sensors because I don’t have a true ground on my arduino… Of course I discovered these problems only when I disconnect USB (which has true ground, through my laptop power supply) and connect this power adapter.

BB on TOL-00298 - Wall Adapter Power Supply - 9VDC 650mA

2009-07-25T03:41:34-06:00

Yes it does (works at 220V), but you’ll need a plug adaptor to fit your sockets.

h3X on TOL-00298 - Wall Adapter Power Supply - 9VDC 650mA

2009-06-30T11:43:32-06:00

Does this plug work in Europe? The pins look different from what I’m used to.