From: Patrick Jankowiak (eccm@swbell.net)
Date: Sat Sep 28 2002 - 12:45:11 PDT
Low tech solution - wire two 15 ohm 15 watt resistors in series, bottom goes to ground. Top goes to MV powerswitch. Middle goes through a 100 volt 5 amp diode ($1.00) to feed the positive terminal of
the 12V battery. This is an old fashioned voltage splitter. The two resistors will get hot, but mount them under the dash somewhere. The regulation is not as good as the zener diode solution, but it
is alot cheaper and more 'period' as far as electronics goes.
note: use fixed width font to see this properly, such as 'courier new'
24V from switch>__/\/\/\/\/\______/\/\/\/\/\____>ground
|
_|_
_\_/_
|
|
12v battery
Here's alot of good info on charging and care of batteries from these web sites:
http://www.interstatebatteries.com
http://www.concordebattery.com/
Bjorn Brandstedt wrote:
>
> Perhaps the simplest way to get 12 volts on board without upsetting the
> charging of the original dual battery system is to add a third battery of
> size and capacity for the individuals needs and just let it charge from the
> 24 volt system.
>
> You would need a charger, which in effect would be a 24 v to charging
> voltage converter. Since the third battery acts as a huge filter, that
> converter can be much simpler than a full blown DC to DC converter and of a
> lot lower capacity.
>
> I think this would be a lot easier than adding a separate
> alternator/regulator and wiring etc.
>
> Let me know if I'm missing something, it happens.
>
> Regards,
> Bjorn
>
> _________________________________________________________________
> Join the world’s largest e-mail service with MSN Hotmail.
> http://www.hotmail.com
>
> ===Mil-Veh is a member-supported mailing list===
> To unsubscribe, send e-mail to: <mil-veh-off@mil-veh.org>
> To switch to the DIGEST mode, send e-mail to <mil-veh-digest@mil-veh.org>
> To reach a human, contact <ack@mil-veh.org>
This archive was generated by hypermail 2.1.4 : Wed Apr 23 2003 - 13:21:26 PDT