Noodle5
NAXJA Forum User
- Location
- Smithtown new york
Where in an xj can I find 5 volts to run a set of lights off for the interior?
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Five volt live line
- Thread starter Noodle5
- Start date
dave92cherokee
NAXJA Forum User
- Location
- Lynchburg, TN
The only place you're going to find 5V anywhere in an XJ's wiring would be a signal coming from a sensor and it would probably be changing often as the sensor changed. All lights in XJ's as well as most cars are 12V lights, you could get 5V 1 of 2 ways either making a simple voltage divider circuit using two resistors, or get a 5V regulator and build a small circuit board to convert 12V input to the 5V output.
old_man
NAXJA Forum User
- Location
- Loveland, Colorado
The power for the sensors is +5v but it does not have enough current capablility to run any other loads.
bigdaddyjlove
NAXJA Forum User
- Location
- Atalanta
Here it is with circuit board/connections attached
http://numato.com/7805-5v-voltage-regulator-breakout-board
WB9YZU
NAXJA Forum User
- Location
- Madison, WI
Oh! I like that. Easy as pie, has all the components needed already soldered up for you and not much more than the reg would have cost you retail anyway, and has terminal strips attached.
- Location
- In the islands
Are these boards 12 volts DC in? I looked on the site and could not find information pertaining to the input voltage. I am on the opinion that they are designed for computer use to facillate data transfer. :eyes:
hubs97xj
NAXJA Forum User
- Location
- Fort Wayne, IN
Google "7805 voltage regulator"...
old_man
NAXJA Forum User
- Location
- Loveland, Colorado
12v will be fine. The problem is that the bigger the difference between 5v and the input, the more heat that gets dumped into the regulator. How much current are you planning to pull?
Talyn
NAXJA Forum User
- Location
- Radford, Communistwealth of Virginia
Keep in mind that when the engine is running the voltage is around 14v.
- Location
- In the islands
OK. I found something.
http://peterflemming.ca/flemmweb_current/schem/opamp_linear/7805.pdf
It says 8 to 30 volts DC in. That answers my question.
Looking at the post above mine by Talyn,...his join date (
) is the same date as mine and he have almost 3 time the amount of posts as I do. I need to double up or triple up to maybe catch up with him.
Last edited:
SC Rednek
NAXJA Forum User
- Location
- Winchester TN
1A at 5V is only 5W (or I'm really bad at math). That's a very small light. I think my dome light is 10W and my trunk lights are two 55W.
- Location
- Rainy side of Washington
The 7805 listed is a great idea, good for up to 1 amp with no heatsink or 1.5 with one. If you need a more efficient regulator look into the lm2575 Simple Switcher. It is more complicated but much more efficient.