Next message: Frank Timpano: "Re: lv-ab: Combining Bilge pump discharges"
This may be pretty stupid, but it's one way to achieve the objective
(perhaps wastefully). Use an inverter to get 120 VAC then use a 12 volt
adapter/transformer to run the halogens. That way, halogen voltage is
independent of battery voltage (nearly so) and you already have the
inverter, I'm sure. The 12 volt transformer is commonly available for this
application from any home center...
At 01:07 PM 8/19/99 -0300, Bob Conrich wrote:
>Amesbury, Kurt wrote:
>>
>>
>> If you want to regulate the voltage, you can pick up a 12-volt regulator
>> (it's either a 7812 or a 7912 - one's positive, the other negative and I
>> don't recall which is which) at any electronic parts store. Cost should be
>> under $1. You'll need a couple of capacitors and resistors to complete the
>> job. Potting the entire circuit in an old 35mm film canister provides
>> corrosion protection.
>>
>> Hope this isn't stating the obvious!
>
>----------------------------
>
>For the electronically challlenged, such as myself, it's far from obvious,
>but I'd like to learn more.
>
>I see in an electronics catalog that the 812 is a positive regulator and
>the 7912 is the negative one. However, they're only rated at one amp, so
>I'm not sure this is the solution for a 25 watt, 12 volt halogen lamp.
>
>Other regulators are listed which are adjustable from 1.2 to 37 volts.
>That's an interesting option, perhaps for a 24 volt or other requirement.
>But again, these are low-amperage devices.
>
>I plan on having a large boat with quite a few halogen lamps and a very
>large battery bank. What's the best way to have a large, regulated power
>supply that will fulfill these various needs? Are such devices
>commercially available? Is this what's called a DC-to-DC power supply?
>
>Please use small words. :)
>
>Bob
>
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>Bob Conrich
>Box 666
>Anguilla
>British West Indies
>--------------------------------------------------------------------------
>
>
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Frank H. Timpano
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