Check this out Ravi:
http://hackaday.com/2012/11/19/bathroom-fan-that-switches-itself-on-when-it-gets-steamy-or-smelly/
It was inspired by this
http://hackaday.com/2009/05/08/fart-intensity-detector/
ROTFL.. how can we use this for radio control?
At 12-11-2012, you wrote:
>
>
>Hello
>
>Diwali Greetings!!!!
>
>I am searching for a power-off delay circuit that works as follows
>
>1. Switch-on activates the equipment and a fan
>
>2. Switch-off switches off the equipment
>
>3. Fan remains on for 2-5 minutes (configurable??)
>
>Used for AC mains (230VAC), switch will be the usual on/off electrical power switch.
>
>Ideas anyone? A tried and tested circuit is preffered.
>
>73
>
>Ravi
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