USB 5V able to hold a relay open?

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projectsw1

Member - Posts: 1

Joined: March 21, 2006

Posted: April 22, 2006 at 9:49 PM / IP Logged

Was just wondering if 5V could hold a regular SPDT open?

here's the best way i can describe what I'm asking:

1. Want to install a power invertor to run a computer

2. a switched 12V source would initially open a relay, powering the invertor

3. computer is powered up and the USB port has 5V (also hooked up to relay)

4. when I shut the car off, the USB port will hold the relay "open or ON"

5. computer shuts down, USB power drops, invertor turns off

is that possible?

bdl666

Silver - Posts: 330

Joined: December 31, 2002

Location: United States

Posted: April 22, 2006 at 11:02 PM / IP Logged

You can use 5 volts relay to keep the other relay to the inverter energized until the computer shuts off.

Something like this :

http://rocky.digikey.com/WebLib/Omron%20Web%20Data/G5V-1.pdf

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USB 5V able to hold a relay open?

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