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help with electric relay. Please.

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markoverclock

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I need help with a problem im trying to fix. I have an fuel injector signal from the ecu on my car 0-12volts i think or its 0-5. The voltage changes from 0-??? but its always a negitve signal.

I need to basically make an electronic relay. it will need to be capable of switching up to about 150 times a second and i believe be able to carry up to 15amps.

Im using this to create a rpm signal from the fuel injector signal, but i need it to always output a 12 volt flashing signal without altering the original 0-??? ranging singal sent to the fuel injector. Help would be great and if someone out thier could help me make one of these i will deposit some money into thier paypal account.:D

I need this to finish a project for my friend before i move. Thanks in advance. the cheaper the better.:D
 

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