kgrant
Newly Enlightened
I need to regulate my cig outlet to 12.0 Volts, max draw 3 amps. What's the best way to do this? I can't seem to find anything commercially available. Thanks
Ok, interesting. This isn't going in my car. It's going to power a cellphone amplifier at my cabin. The manufacturer requires 12.0 Volts. I think I'll just use a cig plug inverter and wall wart. I was looking for something more efficient.
boy... I'd be very surprised if 12VDC isn't a nominal value instead of an absolute max value. You might try contacting the manufacturer and asking about this.
I did contact them and they stated anything over 12.0v may damage the amplifier. ....
It depends on what type of battery you are using as a source. Car batteries are not a lot above 12vdc if not on a charging circuit they typically read about 12.6-13v and a resistor would probably suffice at such a low voltage differential and current load if it was higher voltage then a linear regulator would probably suffice. It isn't until you get a larger voltage difference that other inverter type circuitry would be profitable. Like others here I'm more inclined to think that "exactly 12v" claim is rather bogus as most electronics have an operating voltage range that is usually a few volts wide. If the cellphone amplifier has a 12v power supply I would measure the voltage output of it both with and without the amplifier operating.Ok, interesting. This isn't going in my car. It's going to power a cellphone amplifier at my cabin. The manufacturer requires 12.0 Volts. I think I'll just use a cig plug inverter and wall wart. I was looking for something more efficient.