From: Arthur Bloom (m35prod@optonline.net)
Date: Sat Mar 04 2006 - 06:54:18 PST
Yawn. Why reinvent the wheel? It has been analyzed, researched, and invented
apb
----- Original Message -----
| One thing could be done, to use a small 24-to-12 switching power supply
by Bjorn. Check the archives, and MV mag.
From: "Patrick Jankowiak" <recycler@swbell.net>
To: "Military Vehicles Mailing List" <mil-veh@mil-veh.org>
Sent: Saturday, March 04, 2006 12:20 AM
Subject: Re: [MV] TRAILERS --
| (buck converter) for each lamp to be lit on the trailer. 24V/1A in, 12V/2A
| out.. less any inefficiencies.
|
| truck socket sees proper currents, trailer lamps see proper voltages.
| (unless you have a fat wallet, you should make your own switchers.)
|
| This could also be done cheeply with any solid state circuit that would
| turn the power on and off maybe 100 times a second with a 50% duty cycle.
| Would not need a full blown regulated switcher. (visions of a 555 timer
and
| a BDW94CFP (12A PNP Darlington in an isolated TO-220 case))
|
| but that's for geeks, making your own electronics.
|
| The easiest and cheapest thing by far (other than changing lamps) is to
add
| a second set of lamp fixtures with 24V lamps to include the proper
| connector for your truck's trailer socket. Besides, due to the oddities of
| various brake light wiring schemes among civvy vehicles, you may not want
| to mix and match the wiring.
|
| PJ
|
| Arthur Bloom wrote:
|
| > ----- Original Message -----
| > From: "Ryan Gill" <rmgill@mindspring.com>
| > To: "Military Vehicles Mailing List" <mil-veh@mil-veh.org>
| > Sent: Friday, March 03, 2006 2:46 PM
| > Subject: Re: [MV] TRAILERS --
| >
| >
| > At 9:58 AM -0700 3/3/06, SGM PANTANO wrote:
| >
| >>Hey...wake up.. There is no such thing as a 24 volt or a 12 volt
trailer..
| >>The light receptacles in the Military tail lights could care less what
bulb
| >>is in there..
| >
| >
| > But the wiring could. 24 volt wires could be
| > sized smaller, try to run the same wattage bulb
| > at 12 volts and you could fry your wires. Check
| > the wire harness first!
| >
| >
| >
| > Twelve gauge copper wire has an ampacity of 41 in open air (single
insulated
| > conductor) and an ampacity of 23 in a harness. For 14 gauge wire, the
| > ratings are 32 amps and 17 amps, respectively. It would take a lot of
lamps
| > to reach those limits. In addition, there are fuses which are designed
to
| > fry before the wires do.
| >
| > Arthur P. Bloom
| >
| >
| > ===Mil-Veh is a member-supported mailing list===
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| > To reach a human, contact <ackyle@gmail.com>
| > Visit the searchable archives at http://www.mil-veh.org/archives/
| >
|
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|
|
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