24V - 12V converter works in cigarette lighter receptacle

[scottrsellers]

We found this $45 KUERL Car Electric Convertor works well in our R182 and is sold on Aircraft Spruce[/url]https://www.aircraftspruce.com/catalog/ ... -20610.php[/url]

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[Radioflyer]

On a somewhat related note:

Years ago I built an aircraft air conditioner that utilized a step down transformer to make it work in either 12v or 28v systems. It uses a 12v fountain pump from Harbor Freight to cycle ice water contained in the bottom of a cooler through a VW beetle heater core. A 12v bilge fan sucks cabin air through the heater core in the top of the cooler and then exhausts it out the 4” flexible rain leader which is corrugated so it can be directed onto the pilot or passengers. The cord has a cigarette lighter plug which has a push button on the end and is long enough to locate the unit on the back seat or in the cargo area (The push button on the plug is helpful when the unit is installed out of reach).

When not in use a styrofoam plug that goes into the top where the heater core is to keep the ice from melting.

At the time I was in a club that had both 12v and 24v planes so I needed a way to run the cooler on either voltage. For use with a 28 volt system I added a 24-12v step down transformer than can be inserted inline into a 12v extension chord between the cigarette lighter plug and the unit or removed when using a 12v aircraft. A similar transformer can be found by searching online for 24-12v step down transformer (for example, see https://a.co/d/5VnD2am). The transformer can be removed or installed inline on the power cord by splicing in some 2 pin connectors like these: https://a.co/d/gsFrtK6

I think the whole thing air conditioner cost me maybe $75 bucks (don’t recall). The problem is that with the ice and water it weighs about 60lbs. No problem for day trips but that’s alot of payload to sacrifice on a trip to Oshkosh!

I was also able to power the air conditioner from a portable car jump starter for a couple hours eliminating the need for ship's power entirely on shorter flights.

For your application you could just splice the transformer into the extension cable and be done with it for les than $20.

[andsmi]

We use this device to supply 12V for an Oxygen Concentrator and it works well.