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Car Stereo

Discussion in 'General Electronics Discussion' started by NT15MCP, Mar 29, 2011.

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  1. NT15MCP


    Mar 22, 2011
    DC to DC Boost circuit

    I am attempting to boost a 9.4vdc signal to a 12vdc signal. I have a switched 9.4vdc source and a constant 12vdc source. I am attempting to use a 9vdc relay to switch the 12vdc source through. I know the relay works with a 9v battery, but does not seem to be switching with the 9.4vdc source applied to the coil. Does anybody know how to get more current through the coil to close the switch? The ratings on the coil are 18mA.
    Last edited: Apr 1, 2011
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