Greetings!
I want to quickly say that this is by far the most intelligent group of people I have ever encountered on the net! The level of knowledge here is incredible.
My question is going to seem very ignorant in light of the sophisticated minds on this board, so I beg for your mercy in advance!
I want to use a TV on my boat utilizing the lighter socket since there is not household power available. After much searching, I found a 19" flatscreen that uses a plug-in 120VAC transformer that steps the voltage down to 12VDC at 3A (printed on the pack and the input side of TV) It is detachable, not hardwired into the TV.
I went to Radio Shack and looked at a 12V power adapter that provides different tips, and has a switch to adjust output voltage and respective amperage.
See here
http://www.radioshack.com/product/index.jsp?productId=3875414#
Well, the highest amperage at 12V is 2.5A
What are my options, if any, to increase that value so the TV will function properly? I can't raise the voltage of my boats battery, so I must decrease resistance in the circuit. How do I do that on what is probably a PCB in that power adapter?
Can I make a cable that terminates with the appropriate fitting for the TV input and a 12V lighter socket plug? Wouldn't the lack of current regulation fry the TV in an instant? My lighter socket has a 20A fuse. I know I could change it to a smaller one; but unless I am mistaken, a fuse does not regulate current, only prevents over-current, correct? Am I over-thinking this?
How do I build a resistive circuit to get my 12V lighter socket to deliver 3A safely? Or, maybe you good people can direct me to a website that sells a ready-made power adapter in that configuration. Radio Shack has a bunch of different versions online, but none are 12V/3A specific. Either too high/too low or wrong tip.
Examples:
http://www.radioshack.com/product/index.jsp?productId=3802147&clickid=prod_cs
http://www.radioshack.com/product/index.jsp?productId=3908732#
My dilemma is...I don't understand if the TV's circuitry REQUIRES a closely regulated power supply, or if it can withstand minor amperage swings. If anyone wants to give me an education on this topic...I would be so grateful!
Thank you again in advance for entertaining my ridiculously long question to which I know exists a simple answer!
I want to quickly say that this is by far the most intelligent group of people I have ever encountered on the net! The level of knowledge here is incredible.
My question is going to seem very ignorant in light of the sophisticated minds on this board, so I beg for your mercy in advance!
I want to use a TV on my boat utilizing the lighter socket since there is not household power available. After much searching, I found a 19" flatscreen that uses a plug-in 120VAC transformer that steps the voltage down to 12VDC at 3A (printed on the pack and the input side of TV) It is detachable, not hardwired into the TV.
I went to Radio Shack and looked at a 12V power adapter that provides different tips, and has a switch to adjust output voltage and respective amperage.
See here
http://www.radioshack.com/product/index.jsp?productId=3875414#
Well, the highest amperage at 12V is 2.5A
What are my options, if any, to increase that value so the TV will function properly? I can't raise the voltage of my boats battery, so I must decrease resistance in the circuit. How do I do that on what is probably a PCB in that power adapter?
Can I make a cable that terminates with the appropriate fitting for the TV input and a 12V lighter socket plug? Wouldn't the lack of current regulation fry the TV in an instant? My lighter socket has a 20A fuse. I know I could change it to a smaller one; but unless I am mistaken, a fuse does not regulate current, only prevents over-current, correct? Am I over-thinking this?
How do I build a resistive circuit to get my 12V lighter socket to deliver 3A safely? Or, maybe you good people can direct me to a website that sells a ready-made power adapter in that configuration. Radio Shack has a bunch of different versions online, but none are 12V/3A specific. Either too high/too low or wrong tip.
Examples:
http://www.radioshack.com/product/index.jsp?productId=3802147&clickid=prod_cs
http://www.radioshack.com/product/index.jsp?productId=3908732#
My dilemma is...I don't understand if the TV's circuitry REQUIRES a closely regulated power supply, or if it can withstand minor amperage swings. If anyone wants to give me an education on this topic...I would be so grateful!
Thank you again in advance for entertaining my ridiculously long question to which I know exists a simple answer!