common vehicle power specs?

Home / the12volt's Install Bay / General Discussion / common vehicle power specs? (

Topic Closed)

Welcome Guest :)

Members

< Prev Topic Next Topic >

americasfuture

Member - Posts: 19

Joined: June 26, 2007

Location: United States

Posted: July 02, 2007 at 10:34 PM / IP Logged

i know its commonly know as 12v. but it is read around 13.8v sometimes. im wanting to know what the common wattage and amps are. and also how to reduce a 12v or 13.8 v system to 6v or 6.9v. like what resistance i need to accomplish this

Search for other posts by americasfuture

DYohn

Moderator - Posts: 10,741

This member has made a donation to the12volt.com. Click here for more info.

This member has been recognized as an authority in Electrical Theory. Click here for more info.

This member has been recognized as an authority in Mobile Audio and Video. Click here for more info.

Joined: April 22, 2003

Location: Arizona, United States

Posted: July 03, 2007 at 8:34 AM / IP Logged

12V is the nominal voltage of a car battery. Almost all vehicles operate between 13.8 and 14.4 volts when running as this is normal alternator voltage. Are you talking about determining the common current usage of a vehicle's parasitic loads? This completely depends on the vehicle and on what's running at any given time like A/C, lights, etc. It can vary anywhere from 5 or 6 amps to 30 or 40. There are several ways to design a power supply that will deliver 6V. It depends on what you are trying to power. DC-DC converters are the most voltage-stable, a simple voltage divider is the most reliable. Google the term "voltage divider."

Support the12volt.com

americasfuture

Member - Posts: 19

Joined: June 26, 2007

Location: United States

Posted: July 03, 2007 at 11:36 PM / IP Logged

im wanting to know what the common voltage, amps and watts on any voltage output source while it is running. im trying to build some led tail lights. its just hard to do when m vehical isnt in the same state as me. i want to know how to find out what resistance i need to reduce the power to 6v. i just realized that on my tail lights, the high and low bulb filaments on the tail lights both use 12v. in order to achieve the low side por the tail lights i need to drop part of it to 6v or half of thatever the voltage coming out is. this has nothing to do with the high and low beam on the headlights. different end of the vehical.

citrus3000psi

Member - Posts: 13

Joined: November 27, 2006

Posted: July 17, 2007 at 3:52 PM / IP Logged

To cut voltage in half just use two equal resistors. Heres a picture to help (from http://www.rmcybernetics.com)

If you check the voltage from C to B it will be half of the voltage.

The equation that makes this work is NewVoltage = R1/(R1+R2) * BatteryVoltage

So... 6 Volt = 10k(10k+10K) * 12

When using voltage dividers be smart with the resistors. If you have a large current draw or high volts please use an apportiate resistor.

common vehicle power specs? -- posted image.

americasfuture

Member - Posts: 19

Joined: June 26, 2007

Location: United States

Posted: July 17, 2007 at 4:51 PM / IP Logged

citrus3000psi wrote:

To cut voltage in half just use two equal resistors. Heres a picture to help (from http://www.rmcybernetics.com)

If you check the voltage from C to B it will be half of the voltage.

The equation that makes this work is NewVoltage = R1/(R1+R2) * BatteryVoltage

So... 6 Volt = 10k(10k+10K) * 12

When using voltage dividers be smart with the resistors. If you have a large current draw or high volts please use an apportiate resistor.

common vehicle power specs? -- posted image.

where would i go on that link to find this info? id like to bookmark it for future references.

citrus3000psi

Member - Posts: 13

Joined: November 27, 2006

Posted: July 18, 2007 at 8:27 AM / IP Logged

http://www.rmcybernetics.com/science/cybernetics/electronics_example_circuits.htm

This is the page that the circuit is on. The site navigation is pretty bad but there are a lot of good info if you can find the pages. This is another good page. It tells you have to make a varible DC output. So you could run dc motors etc at whatever rpm. It allows you adjust frequency etc.

http://www.rmcybernetics.com/projects/DIY_Devices/homemade_signal_generator2.htm

americasfuture

Member - Posts: 19

Joined: June 26, 2007

Location: United States

Posted: July 18, 2007 at 1:34 PM / IP Logged

oh sweet, thanx a bunch. great info to have

Sorry, you can NOT post a reply.
This topic is closed.

Printable version

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot delete your posts in this forum
You cannot edit your posts in this forum
You cannot create polls in this forum
You cannot vote in polls in this forum

Search the12volt.com

Follow the12volt.com

Disclaimer: *All information on this site ( the12volt.com ) is provided "as is" without any warranty of any kind, either expressed or implied, including but not limited to fitness for a particular use. Any user assumes the entire risk as to the accuracy and use of this information. Please verify all wire colors and diagrams before applying any information.

common vehicle power specs?

Sorry, you can NOT post a reply.This topic is closed.

Sorry, you can NOT post a reply.
This topic is closed.