Going from 5volt 1A to equivalent from a 3V CR2 Battery

capacitancecapacitordcvoltage-regulator

I have a small camera with wifi that runs off a 3V CR2 battery. I'm trying to run it from line voltage. Could not find any small transformers that go to 3volt 750mA.
I have an Apple transformer for the iphone it outputs 5volt 1A. (I'm getting 5.33V on the crappy tester)
I've tested a fully charged 3v CR2 and it puts out 3.24volts ; I bought a NTE1904 which has a Vo 3.3V Io of 1A; when i hook it up to the breadboard I'm getting 3.25 volt output.

The mfgr of the camera said on their website that this is a 3V 750mA device; the device with the battery gives off considerable heat and only last a 1.5 hours on the battery.

When I plug it into the output of the voltage regulator straight the light comes on but it wifi doesn't work (bad because its the only way to connect to it); when i switch back to battery she works like a champ. I put 10mu caps on the output side but light didnt even come on.

Am i missing a major concept. I'm kind of a newbie. would appreciate any help.

overview of the problem

spec sheet of NTE1904
http://www.nteinc.com/specs/1900to1999/pdf/nte1904.pdf
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Camera Specifications
• VGA 640×480, QVGA 320×240, QQVGA 160×120, up to 30fps
• F2.8
• View Angle: 60 degree
• Focusing: 20cm to Infinity

Video Recorder
• Motion JPEG
• Compression mode : standard, high
• Typical bit rate: (VGA): standard (2500 kbps), high (1600 kbps) (QVGA): standard (1100 kbps), high (800 kbps) (QQVGA): standard (600 kbps), high (400 kbps)

Video Snapshot
• JPEG
• Compression mode : standard, high

Wireless Interface
• IEEE 802.11b/g 2.4GHz ISM Band

Wireless Security
• WEP 64/128, WPA, WPA2

Wireless Range
• Infrastructure: 20m (Typical)
• Adhoc: 7.5m (Typical)

Wireless performance*
• Infrastructure: 54Mbps, max. connection rate
• Adhoc: 11Mbps, max. connection rate
• Note: Wireless performance varies with distance and access point usage.

Antenna
• Single, internal

Dimension / Weight
• 30mm(Diameter) x 35mm(L)
• 100g

Power Supply / Consumption
• Battery operated
• Voltage: 3.0V
• Power: 750mAH (CR2)
• Current consumption: 320mA (typical); 350mA (maximum)

RoHS
• RoHS Compliant

User interface
• Menu driven via Embedded Web server on module

Best Answer

1) Check to see if the NTE1904 can operate off of a 5V supply -> if not you need a LDO (Low Drop Out)

2) make sure it's not over heating and cutting out. (5-3)[v]*1[A] = 2W -> heat sink.

3) Batteries are really good at handling peak currents, so the start up inrush current may be too high for the device. That means you may have to use a device that can put out more current than the nominal rating. -> if you have a scope and current sensing resistor you could capture that.

Those are the three big things to look for.

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