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Old 09-16-2011, 06:14 PM   #1
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Converting a battery operated device to an AC adaptor


I have a parking device in my garage that uses 4 standard AA batteries and I would like to convert this device to use an AC power adapter. What would be my steps to convert this device and what parts would I need?

Thanks for you assistance

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Old 09-17-2011, 05:54 AM   #2
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Converting a battery operated device to an AC adaptor


Unless the device was designed for an AC adapter, this project is going to have a makeshift appearance (duct tape and baling wire so to speak).

Find the battery terminals in the device that lead to the circuitry (as opposed to connect one battery to the next). Using a voltmeter you would find which two (a positive and a negative) that register 6 volts with the batteries installed (4 ordinary batteries).

Purchase an AC adapter that outputs 6 volts DC. Ideally you need to find out how many milliamperes the circuitry draws (using a multimeter) but if it uses AA batteries, chances are that any commercially available AC adapter has enough output (in milliamperes).

Connect the positive lead of the adapter to the positive battery terminal (found above) of the device etc. No ground is needed. If using solder, be careful not to melt nearby plastic parts.

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Last edited by AllanJ; 09-17-2011 at 05:58 AM.
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Old 09-17-2011, 09:32 AM   #3
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Converting a battery operated device to an AC adaptor


In addition to what AllanJ said, you need to make sure the AC/DC power supply is a true regulated power supply. Some are really nothing more than a transformer with a diode bridge....lots of ripple....depending on the parking device, it make not like any AC....hence, you would need to put in a filter cap.

Also....measure the voltage...some of those adapters are 'around' 6 Vdc....some might be 8....others 5......

Is the parking device one of those things that tells you when your in far enough? Maybe it would be easier to train the driver.
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Old 09-17-2011, 08:12 PM   #4
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Converting a battery operated device to an AC adaptor


First you need to find out if all the batteries are in series or if part are in parallel.
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Old 09-17-2011, 09:05 PM   #5
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Converting a battery operated device to an AC adaptor


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Originally Posted by ddawg16
Maybe it would be easier to train the driver.
Im going to make a wild guess and say that your not married... :laugh:
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Old 09-17-2011, 11:40 PM   #6
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Converting a battery operated device to an AC adaptor


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Originally Posted by Master of Cold View Post
Im going to make a wild guess and say that your not married... :laugh:
Very married.....but then again, my wife knows how to drive, read a map, and use a remote.....as well as use all the power tools in my garage....while still looking good in a dress.....just don't ask her to keep a balanced budget.....
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Old 09-18-2011, 12:48 AM   #7
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Converting a battery operated device to an AC adaptor


Quote:
Originally Posted by ddawg16 View Post
Very married.....but then again, my wife knows how to drive, read a map, and use a remote.....as well as use all the power tools in my garage....while still looking good in a dress.....just don't ask her to keep a balanced budget.....
Who cares about a balanced budget, the important things are:

Does she know the difference between a receptacle and a plug?


Does she know the difference between a wye and a delta system?


Does she know the difference between grounding and and bonding?


I made my wife of 12 years learn this before I married her.

Yes I am an electrical code geek. I admit it.

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