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Topic: Appliance Status Detection (Read 332 times) previous topic - next topic

Nate1206

So there are a lot of home appliances that I would like to detect status of.  Examples would be is the coffee make brewing, what cycle is the washing machine on, things like that.  All of these statuses are usually indicated by an LED light on the appliance.   I's it out of the realm of possibilities to plug into these LED lights to see if they are on or off?  Not by light sensing but through splitting the wire to the led and detecting the voltage?

Thanks for the input!

Paul_KD7HB

So there are a lot of home appliances that I would like to detect status of.  Examples would be is the coffee make brewing, what cycle is the washing machine on, things like that.  All of these statuses are usually indicated by an LED light on the appliance.   I's it out of the realm of possibilities to plug into these LED lights to see if they are on or off?  Not by light sensing but through splitting the wire to the led and detecting the voltage?

Thanks for the input!
I have no idea what you mean by "splitting the wires". Do you mean cut the legs on the LED if they have legs or unsoldering them from the circuit board if they are SMD LEDs?

There is nothing stopping you from trying your plan and seeing if it works. Probably nice to have a DVM to check what you are working with.

Paul

chopsuwe

You can measure the voltage across the LED but it's not very safe. Some LEDs will be connected directly to the mains. I highly recommend using a light sensor, or an optocoupler across the LED if you really must make a connection.

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