How to Connect Car LED Downlight

A car LED downlight available in the market can be easily integrated to an existing car battery if its rating is identical to the battery's voltage rating. I have explained more regarding one such request sent by Mr. Allwyn Siqueira.

How to Connect Downlight to 12V Car Battery

Hi Swagatam,I've just spent the last 3 days reading your blog and I'm just blown! I was doing a Google search on making a simple electric circuit and that's how I came across your website.Your site is just fascinating and you've shared so many wonderful circuits that its been driving me mad!I was trying to do a small home project using a 12V car battery and a 12V/5W LED Downlighter and wanted to know how I could connect the downlighter to the 12V car battery without going via an inverter.I looked at the following circuit on your blog, but not sure if this is what I need.https://www.homemade-circuits.com/2012/11/3-watt-5-watt-led-dc-to-dc-constant.htmlWould you be able to help me please?The LED Driver that came with the Downlighter is a rated at 3-5x1WPRI: 110-240VACSEC: 9-17VDC / 300mA +/-5%The battery I would like to connect this to, is a 12V Car Battery 70Ah (without using the 240V LED Driver and an inverter)Any information into how I could make this circuit would be warmly appreciated.Thank you very much and once again, fantastic blog (I will continue to read the Solar related material when I get time)Best regards,Allwyn SiqueiraGoa

A Typical 5 Watt LED Car Downlight Image

Connection Details

Hi Allwyn,

Thanks very much for liking my blog.

If the LED that you have is rated at 12V/5watt means it can be directly connected to a 12V battery supply irrespective of the battery AH rating. The same will be true for any LED assigned with a voltage matching the battery voltage.
For added safety you can include a 1 ohm 1 watt resistor in series with the LED.

Hope this helps.

Regards.