But the IP cam didn't work. I
Did you recheck you wiring? What type of regulator chip are you using? What is the voltage output of the regulator chip when the cam is connected to it? A 5v UBEC like below would probably make for an efficient regulator setup for the cam power.http://www.ebay.com/sch/i.html?_from=R40&_sacat=0&_sop=15&_nkw=ubec+5v&rt=nc&LH_BIN=1
You expect us to understand your problem better than you withouttelling us which IP cam model you have? Better post all the details of yourhardware if you want informed answers. Details matter and details cannotbe guessed.Please do read the sticky threads about posting, it saves everyone time andconfusion and you get better answers quicker....
What I tried to do was to make the IP cam work on using my rechargeable battery with 12v and initial current less than 1.6A then using its output to regulate to 5v using a IC regulator. But the IP cam didn't work.
You need to use a Switching regulator for that!Using an 78xx or any linear regulator, it throws away the extra voltage as heat. If you are pulling 1 Amp at the output of the voltage reulator (at 5 Volts) it is burning off 7 WATTS OF POWER! You need an enormuous heatsink to keep that regulator cool and happy, and you'll waste over 50% of the battery power to heat, not powering the camera. Yo do not want that.Get something like this: http://www.ebay.com/itm/301218533352 (there is a shitload of them on eBay)...// Per.
Well obviously, the camera requires 5V only, you have a mains supply generating 5Vand a 12V battery - what exactly did you do? Hopefully you didn't put 12V on thecamera directly?
So, I'm trying to make a variable voltage regulator to see if it will work. I will update if this gonna solve my problem.
The wireless IP cams take a good bit of power, your cam links say the power requirements are DC 5 V - 1.2 A . With your 7805 chip setup measure the output voltage, then connect the cam and see if the voltage stays at 5v or significantly drops (the large 7805 chips are good for about 1A).
I haven't run two 7805 chips in parallel, but it might be possible to supply the required current.
Why would you want to "make" a variable voltage regulator? You specifically want a fixed 5V regulator, and for that current it really wants to be a switchmode one as was suggested to you above. You do not want it to be variable to any other than 5V, and a switchmode regulator is all the more essential if you are going to power it from a battery.And ... building switchmode regulators as such is certainly not for the inexperienced.