Re: [HamBrewers] Power-off delay circuit

 

I smell a QROO linear being brewed ;-). Please check the various amp [bias control, metering and protection] board which also include this feature you are requesting to control the blowers using microcontrollers. There are 3 amp mailing list from which you can digout stuff

amps@contesting.com

ham_amplifiers@yahoogroups.com

rfamplifiers@yahoogroups.com

73

Aravind

On 11/13/2012 12:26 AM, gareth evans wrote:

 

It sounds exactly like those fan units fitted as ventilators in bathrooms --- On Mon, 12/11/12, ravimiranda <ravimiranda@yahoo.com> wrote: 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.

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