This is how I do it. It announces over whole house audio. More complicated than what you're asking for but hopefully it's helpful.
Read the full replyDoes anyone make an "alarm" that tells when something is powered on/off?
I'm picturing something you plug an appliance into, that will sense the load. When the appliance is turned on or off, it sends a UHF-wireless chirp to a little beeper you can take around the house.
Something that will tell me when the laundry is done :)
Background: i have a gas dryer, which only requires a normal 120V outlet.
This is how I do it. It announces over whole house audio.
More complicated than what you're asking for but hopefully it's helpful.
This depends on how much digging/hacking you are comfortable with...
I have added optically-isolated sensors in my Dishwasher and Dryer that signal my home automation system when they are on. A little logic alerts me to "Open the dishwasher to dry, please", etc.
But that may be much more than you want/need, and it reasonable only as a part of a larger system.
I understand (Sorry can't point to one immediately) that there are available "Plug-Thru" sensors that signal when a device is on. (Someone??)
You could hack an X-10 remote to turn on a circuit with a light/buzzer etc. plugged in.
I don't know of an off-the-shelf transmitter to a 'wearable' alert receiver... but I bet some else does...
Regards, Terry K> Does anyone make an "alarm" that tells when something is powered on/off?
A better solution would be an AC relay with a coil voltage that matched the motor in the dryer. Marlin P Jone & Associates
At $3.95US each, it's a cheap interface.
Use the output contacts to control the X10 PowerFlash or whatever.
John
Yeppp!!! Known as a Current Operated Switch. Neilsen-Kuljian makes a line of switches with sensitivities from 1 amp to several hundred amps. Some have both NO and NC switches in the same unit, with adjustable trip points for each set of contacts. They're made for On/Off/Overload conditions on motor circuits. Neilsen-Kuljian doesn't appear to have a web presence, but I found a vendor at
Cheers!!!
I did. Hooked a current transformer to my water heater. Beeps when the heater turns on and again when it shuts off. Current transformer powers the circuit - no separate supply. Also flashes an LED while the heater is sucking power.
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