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Dc 12 to be reduced to dc 5 volt

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cptaycerato 
Member - Posts: 12
Member spacespace
Joined: April 02, 2006
Location: Singapore
Posted: October 23, 2006 at 11:45 AM / IP Logged  
I have a MP4 LCD player but it is a DC5 volt power input.... anyone out there knows how to reduce the DC12 of the car power voltage to DC 5 voltage so that it can use for my player?
i am an idiot 
Platinum - Posts: 13,667
Platinum spaceThis member consistently provides reliable informationspace
Joined: September 21, 2006
Location: Louisiana, United States
Posted: October 23, 2006 at 8:03 PM / IP Logged  

Actually it isn't really that complicated         But first I need to know how much current your device draws?         it will be  300ma    500ma     750ma          1amp

Second I need to know if you know how to solder?

The parts you will need are available at RadioShack  at  1.59 each   we may need 2  depending on the current draw of your device

cptaycerato 
Member - Posts: 12
Member spacespace
Joined: April 02, 2006
Location: Singapore
Posted: October 23, 2006 at 11:10 PM / IP Logged  
Supply Voltage: DC5V
Work Current: 350mA
I know how to solder
I wanted to knwo what is a radiochack (1.59) where can i but it?
haemphyst 
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Platinum spaceThis member has been recognized as an authority in Electrical Theory. Click here for more info.spaceThis member has been recognized as an authority in Mobile Audio and Video. Click here for more info.spacespace
Joined: January 19, 2003
Location: Michigan, Bouvet Island
Posted: October 23, 2006 at 11:23 PM / IP Logged  
7805 5V Positive voltage regulator. Three terminals, 12v in, ground, 5 volt out. At 350mA, you won't even need a heatsink.
Radio Shack catalog number 276-1770. $1.59 each, and one will be plenty.
It all reminds me of something that Molière once said to Guy de Maupassant at a café in Vienna: "That's nice. You should write it down."
cptaycerato 
Member - Posts: 12
Member spacespace
Joined: April 02, 2006
Location: Singapore
Posted: October 23, 2006 at 11:57 PM / IP Logged  
What is a radio shack? How does it look like? Where can i bought it?
cptaycerato 
Member - Posts: 12
Member spacespace
Joined: April 02, 2006
Location: Singapore
Posted: October 24, 2006 at 12:03 AM / IP Logged  
I am installing the device which need only 5 volt power in a car which is 12 volt in power. How can a radioshack helps me and Where should I solder the radioshack. Please help as i am not familiar with electronics
i am an idiot 
Platinum - Posts: 13,667
Platinum spaceThis member consistently provides reliable informationspace
Joined: September 21, 2006
Location: Louisiana, United States
Posted: October 24, 2006 at 3:33 AM / IP Logged  
Sorry   I didn't notice your location           Just click on the link that Haemp posted
i am an idiot 
Platinum - Posts: 13,667
Platinum spaceThis member consistently provides reliable informationspace
Joined: September 21, 2006
Location: Louisiana, United States
Posted: October 24, 2006 at 3:45 AM / IP Logged  

When you get the part you can order it via the Link In Haem's post with the part facing you (the side with the text on it) the pins are in the order Haem mentioned    Voltage In      Ground       5Vout

I would solder a red wire to the left pin   which will be supplied 12 volts when your ignition is on

A black wire to the middle pin to be Grounded and a wire color of your choice to the right pin         this will be your 5 volt wire to feed your device

cptaycerato 
Member - Posts: 12
Member spacespace
Joined: April 02, 2006
Location: Singapore
Posted: October 24, 2006 at 9:26 AM / IP Logged  
how to I order? how to pay u?
haemphyst 
Platinum - Posts: 5,054
Platinum spaceThis member has been recognized as an authority in Electrical Theory. Click here for more info.spaceThis member has been recognized as an authority in Mobile Audio and Video. Click here for more info.spacespace
Joined: January 19, 2003
Location: Michigan, Bouvet Island
Posted: October 24, 2006 at 10:09 AM / IP Logged  
Radio Shack is an electronics store in the US, (and other parts of the world, I believe, but apparently not Singapore). I believe they will ship worldwide, and they accept credit cards for online purchases.
eBay is not allowable linkings here on the12volt, but go to ebay.com, enter 7805 in the search engine there, and buy from someone close to your location. Freight to Singapore will be more than the cost of the item for you, unfortnately.
It all reminds me of something that Molière once said to Guy de Maupassant at a café in Vienna: "That's nice. You should write it down."

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