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Using an AC Circuit to Turn on Another AC Circuit

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dellsam34:
I'm looking for an idiot proof solution, The problem is, everytime someone is cooking using the stove's hot plate they always forget to turn on the range fan to extract vapors and fumes resulting in a smelly house unless all the windows are opened. My initial thought in solving this issue is to build a clamp amp or amp probe around one of the stove power cord wires and use that as a trigger to turn on the range fan so that way as soon as the stove is turned on, the range fan comes on. I'm in the US, the stove runs out of 220VAC and the range fan runs out of 110VAC. I'm not really into electronic circuit design, but I'm open for pre designed circuits or a DIY ready product, I just haven't been able to find what I'm looking for using google search.

dellsam34:
I think I may have found the jackpot:
https://www.amazon.com/CrocSee-Miniature-Normally-Monitoring-Detectable/dp/B086YT49H7/ref=pd_bxgy_d_sccl_2/141-6734972-5135907?pd_rd_w=1f43R&content-id=amzn1.sym.53b72ea0-a439-4b9d-9319-7c2ee5c88973&pf_rd_p=53b72ea0-a439-4b9d-9319-7c2ee5c88973&pf_rd_r=W2YFQTS7HT8JK766VHJW&pd_rd_wg=JowLj&pd_rd_r=95397b09-b073-4af6-b235-69526eed3398&pd_rd_i=B086YT49H7&psc=1

WattsThat:
Just be aware that the output of the current sensor is “pilot duty” meaning you do not want to control a fan directly with the normally open contact as it is only rated for 2.5 amps. You’ll want to drive a relay with contacts rated for the fan amperage. Keep in mind many AC motors draw 5-10 times higher amps for a brief time at startup, this drops to the rated amps once they reach rated speed.

Here’s a 30 amp rely:

www.amazon.com/Tnisesm-Mounting-Connect-Terminals-HF105F-4-AC120V-8X/dp/B087G3FWVT/ref=sr_1_21

inse:
If the hot plate has a physical switch, you could just tap there to control a relay with the right coil voltage or use a capacitive dropper.
If there was a „hot“ indicator, that would be an even better place to tap into.
In case the hot plate is thermostat controlled, the current detection method will cycle the fan as it does for the cooking plate.

PCB.Wiz:

--- Quote from: dellsam34 on January 20, 2025, 05:26:09 am ---I'm looking for an idiot proof solution, The problem is, everytime someone is cooking using the stove's hot plate they always forget to turn on the range fan to extract vapors and fumes resulting in a smelly house unless all the windows are opened. My initial thought in solving this issue is to build a clamp amp or amp probe around one of the stove power cord wires and use that as a trigger to turn on the range fan so that way as soon as the stove is turned on, the range fan comes on. I'm in the US, the stove runs out of 220VAC and the range fan runs out of 110VAC. I'm not really into electronic circuit design, but I'm open for pre designed circuits or a DIY ready product, I just haven't been able to find what I'm looking for using google search.

--- End quote ---

For a similar problem, I used a Solid State Relay, with a series resistor as the source 230V load (rangehood lights) was only single digit watts rated.
( I was not sure how the capacitive dropper would affect that)
I found a SSR with a 230V input (not common, but they do exist) - come in 10A, and mine was Ok to switch a modest load of 4 slave lamps.
It should be fine with your extractor fan, also a modest load.

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