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using an oscillating current to switch a relay

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nst197:
Hi Everyone,

My first post here so please go gentle on me  :)

I've got a sensor that produces an oscillating current when triggered. The two states are:
- not triggered 24V, 60mA
- triggered 24V, current oscillates between 60mA and 120mA at around 1-2Hz.

I'd like to switch a 24V device when the sensor is triggered. Can anyone suggest an approach for doing this, and whether there's an off the shelf device that could do it?

Thanks

drdm:
You can use a sense resistor for sensing the current and turn it into voltage. from there you can use a simple peak detector with a diode, a cap and a resistor to distinguish between ON and OFF. But this is just guesswork. Can you share some details about this sensor?

BeBuLamar:
What kind of sensor is it? Do you have make and model? It's strange because how can it change the current if the voltage is fixed at 24V?

Badwolf:
There are relays whose coil can be powered by an alternating signal. I don't have a reference handy, but you should be able to find some on sites like Mouser

TimFox:
"AC coil" relays are normally designed for use with 50 or 60 Hz alternating current.
The coil construction differs from "DC coil" relays.

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