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  #1  
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12v voltage regulator

I'm giving yet another 12v TV a try. A Jensen. We'll see. I've returned other attempts.

I was thinking of hard wiring a voltage regulator into the line, so it always received 12v and not the higher voltages that actually come from the house bank.

Any recommendations on which?
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Re: 12v voltage regulator

It depends upon the current draw, I have a massive (and expensive) 24VDC-12VDC regulator for my SSB, but that's because of the large amperages involved. A simple regulator that brings current down from up to 36VDC to a regulated 12VDC such as the 3Amp Tracopower TSR 3-24150 costs only $30 at farnell.com. The price is high because it is energy efficient, you can get a linear regulator such as the 511-L7812CV for about $0.70, but it would need a heat sink and use more power, especially in standby-mode. The input voltage must be at least 0.5V higher than the output voltage. If you need 12VDC output when the battery is less than 12.5V then a different device is needed, which adds to the cost.
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Re: 12v voltage regulator

Requiring 12.5v sort of defeats the purpose, but would theoretically work the majority of the time.

I would like to think the Jensen 12v TVs, which are sold specifically for boats and RVs, are capable of taking a variety of input voltages. I just can't find a spec that confirms it. They are all written as "12v", which we all know is almost never actually the case in either a boat or RV.
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Re: 12v voltage regulator

I bought a Carnetix DC-DC converter meant for car computers; gives a nice 12v (and 5v) well regulated. Not using it just now; my hair TV seems happy on ship's "12v".


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Re: 12v voltage regulator

Specs are 12 v nom with a 3.3 amp/ 25 watt draw on the 19 inch LCD unit model jen1912lcd
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Re: 12v voltage regulator

Quote:
Originally Posted by newhaul View Post
Specs are 12 v nom with a 3.3 amp/ 25 watt draw on the 19 inch LCD unit model jen1912lcd
25 watts is basically 2 amps, not 3.3
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