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Joined: Dec 2002
Posts: 217
CEG\'er
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OP
CEG\'er
Joined: Dec 2002
Posts: 217 |
OK, so I have a 5-volt device I wanna run in my 'tour. Are there any 5-volt power sources in there that I could tap into?
If not, what could I do to step down a 12v wire to a 5v wire?
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Joined: Nov 2003
Posts: 3,395
Hard-core CEG\'er
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Hard-core CEG\'er
Joined: Nov 2003
Posts: 3,395 |
Step down transformer?  
Former owner of a 1995 Ford Contour GL w/ 2.0L ATX
Proud owner of a 2005 Ford Taurus SE 3.0L V6 Vulcan 
--Looking for Commodore stuff (Drives, Units, Amiga, games, etc)If anyone has any of this laying around and wants it gone, lemme know --
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Joined: Sep 2002
Posts: 1,788
Hard-core CEG\'er
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Hard-core CEG\'er
Joined: Sep 2002
Posts: 1,788 |
While there may be 5 V sources in the vehicle, I suggest not messing with them. You screw them up, the engine won't run.
A simple +12 to +5 volt supply can be made with a 7805 (or LM340T-5) IC and a couple of capacitors for noise and voltage stabilization. A lot depends on how much load current you need to draw and what the actual load device is.
Steve
98 Contour SE Sport 2.5 Duratec ATX The wifey's car
89 Taurus SHO - 246K miles
94 SHO ATX - 190K
1997 F-150 5.4L ATX - The Workhorse 150K.
ANY THREAD WITH "OMG" or "WTF" ETC IN THE TITLE WILL BE IGNORED!
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Joined: Sep 2002
Posts: 1,788
Hard-core CEG\'er
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Hard-core CEG\'er
Joined: Sep 2002
Posts: 1,788 |
Originally posted by ContourKev:
Step down transformer?
Transformers only work with alternating current....
98 Contour SE Sport 2.5 Duratec ATX The wifey's car
89 Taurus SHO - 246K miles
94 SHO ATX - 190K
1997 F-150 5.4L ATX - The Workhorse 150K.
ANY THREAD WITH "OMG" or "WTF" ETC IN THE TITLE WILL BE IGNORED!
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Joined: Sep 2000
Posts: 4,693
Hard-core CEG'er
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Hard-core CEG'er
Joined: Sep 2000
Posts: 4,693 |
A lot of cell phone chargers are 5 volt from what I have been told. You might take a voltmeter to one and see what you have.
To reduce the voltage on a DC system, you use a choke. For many years most cars used 9 volts for the instruments in the dash and the voltage was choked down with an IVR (instrument voltage regulator). When they would fail, most of the gauges would be pegged on the high side. I have changed quite a few.
Jim Johnson
98 SVT
03 Escape Limited
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Joined: Nov 2004
Posts: 197
CEG\'er
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CEG\'er
Joined: Nov 2004
Posts: 197 |
if u want to keep it simple go down to your locial electronics store and get an adaptor that plugs into your lighter.i work at futre shop (canadian bestbuy) we sell one for 16.99 and u can select 1.5 3 5 6 7.5 and 12v i beleave it has a max raiting of 2000mah. and if u dont want to keep pluging this thing in you caould gust wire it up to the adaptor. and rememmber that the center is + and the wall or side is -
RIP Frank Foreman. March 15 2005. died in a tragic car crash at the age of 18.<Drive Safe>
1995 Contour gl Zetec auto.
178000km
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Joined: Jun 2003
Posts: 699
Veteran CEG\'er
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Veteran CEG\'er
Joined: Jun 2003
Posts: 699 |
Originally posted by projectSHO89:
While there may be 5 V sources in the vehicle, I suggest not messing with them. You screw them up, the engine won't run.
A simple +12 to +5 volt supply can be made with a 7805 (or LM340T-5) IC and a couple of capacitors for noise and voltage stabilization. A lot depends on how much load current you need to draw and what the actual load device is.
Steve
What he said.
My Cars
1999 Silver Frost SVT - 80,000km #2603/2760 Aug. 10, 1999.
1996 Mercury Mystique LS V6 MTX - retired @ 323,151km.
1995 Ford Contour V6 MTX-sold @ 214,000km
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