Car Stereo to In-Home Conversion

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fakepete

Copper - Posts: 99

Joined: April 21, 2002

Location: United States

Posted: June 18, 2003 at 2:17 PM / IP Logged

When you rectify 12VAC you end up with closer to 17VDC because 12 VAC is an RMS value. The peak AC voltage needs to be closer to 12 volts, so you would need to use a transformer rated for 9 to 10 volts AC, which would give you a 12.69 to 14.1 VDC rectified output.

Orang

Member - Posts: 10

Joined: June 16, 2003

Location: Canada

Posted: June 18, 2003 at 2:31 PM / IP Logged

Actually 12V Capacitor will make the voltage around 16VDC to 17DC unloaded. It should be fine for this application.

MielGibson

Copper - Posts: 74

Joined: January 03, 2003

Location: United States

Posted: June 19, 2003 at 6:28 PM / IP Logged

I disagree.

When designing power supplies and choosing a capacitor, you have to consider the voltage input. It's never a good practice to feed 12 volts to a 12-volt capacitor.

fakepete

Copper - Posts: 99

Joined: April 21, 2002

Location: United States

Posted: June 21, 2003 at 8:53 AM / IP Logged

Orang wrote:

Actually 12V Capacitor will make the voltage around 16VDC to 17DC unloaded. It should be fine for this application.

Could you explain how and why there would be a voltage increase from a capacitor? I think you might need to refresh your memory on AC and DC theroy.

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Car Stereo to In-Home Conversion

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