Bunk-light & fan

[wavery]

I just spotted this at Walmart......way cool:
http://www.walmart.com/catalog/product.do?product_id=4767725

[dthurk]

I just spotted this at Walmart......way cool:
http://www.walmart.com/catalog/product.do?product_id=4767725

Wonder if that can be modded out to run on 12v socket on the celing light?

[fritz_monroe]

It uses 4 batteries, how about hooking 2 of them up inseries?  Maybe some sort of splitter?

[wavery]

Wonder if that can be modded out to run on 12v socket on the celing light?

It runs off of 4-D cell batteries. That means that it is 6v (4 x 1.5v=6v).

It could be adapted but you would need to get a voltage reducer:
http://cgi.ebay.com/REGULATED-CAR-POWER-ADAPTER-12V-DC-TO-3V-4-5V-6V-9V_W0QQitemZ9728636878QQcategoryZ60208QQssPageNameZWD1VQQrdZ1QQcmdZViewItem
You can get them at radio shack for about $10 (I think).

They are kind of handy to have in the camper. You can run just about anything that runs off of flashlight batteries with your 12v system in the PU.

Another option would be to use rechargeable batteries. It will run 12hrs on high and 48hrs on low, with the 4 D cells..

[flat_lander]

It runs off of 4-D cell batteries. That means that it is 6v (4 x 1.5v=6v).

It could be adapted but you would need to get a voltage reducer:
http://cgi.ebay.com/REGULATED-CAR-POWER-ADAPTER-12V-DC-TO-3V-4-5V-6V-9V_W0QQitemZ9728636878QQcategoryZ60208QQssPageNameZWD1VQQrdZ1QQcmdZViewItem
You can get them at radio shack for about $10 (I think).

They are kind of handy to have in the camper. You can run just about anything that runs off of flashlight batteries with your 12v system in the PU.

Another simply option is to build a simple voltage divider circuit.  In this case, the fan is essentially a resistive load which creates a 6V voltage drop on your 12V DC line.  Therefore you need only add  an equivalent load in line with your 12V source to drop or consume the remaining 6V.   See the example here...http://www.aikenamps.com/VoltageDividerRule.htm

I'd add a picture, but I'm not sure how to embed it into this post......Sorry.  Anyway these are simply circuits easily created.  This is basically what the radio shack regulator is doing.  You can make these adjustable by using a variable resistor as your dummy load.   You only need to make sure that you select a resistor that is rated for the proper amount of current that will be flowing thru the lines.  

Hopefully this makes sense....
flat_lander

[fritz_monroe]

After thinking about this a little, there is a problem with using a voltage reducer, the power that is used in the reducer is just lost.  With a limited amount of power available via the battery, one of the last things I want to do is waste power.

[sequoyausa]

Wow! Thank you! I was looking at the bunkend lights here at the store that plug in to the light system and are expensive. Someone else said they modified some lights from Walmart. I'll have to see what they did. My brother-in-law is an electrical genius. I'll bet he can adapt them.