Hello, I'm new to this site and somewhat new to practical electronics (although I'm pretty solid on the physics of it all.) Here's my problem: I need a device that functions like a relay switch. However, instead of responding when it receives any voltage (within its specs), I need a relay that will respond only when it receives a very specific voltage, or a narrow range of voltages. It should not trip if it receives a voltage out of that range. Does such a device exist? If not, is there a way I can make one? Thanks very much.
Here are more details about what I'm trying to do: The steering wheel in my car has 6 switches in it that control various aspects of the radio. All 6 have a different resistor value associated with it and lead to a common output wire to the radio. The processor in the radio determines which switch was thrown by the voltage or current that it reads--which will be different for each switch due to the differing resistors. I'm trying to commandeer one of these switches to operate an air horn....
Thanks very much for any guidance.
Here are more details about what I'm trying to do: The steering wheel in my car has 6 switches in it that control various aspects of the radio. All 6 have a different resistor value associated with it and lead to a common output wire to the radio. The processor in the radio determines which switch was thrown by the voltage or current that it reads--which will be different for each switch due to the differing resistors. I'm trying to commandeer one of these switches to operate an air horn....
Thanks very much for any guidance.