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Switching Relay

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josefwbfl

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I have been looking for a switching relay. Use to be able to buy one that would switch a horn from Hi tone to Low tone. Does anyone know where i can buy one or have a circuit design that will do what I'm looking for?
 
What application? What type of horn? What is the input?
 
Let me clarify the application here, while holding the horn button the horn switches from hi tone to low tone, without releasing the horn button.
 
go to Napa and ask for a 537 flasher. fasten one horn on each output, ans power from you switch to input on relay.

use these relays to alternate grill lights on police cars
 
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