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PIC 18F4550 timer to dim light when no one walk

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giraffu

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PIC 18F4550

May i ask am i able to set something like a timer in which it will turn something on at predetermined time. As i would like to switch on light at night. Further more i would also like to use PIC 18F4550 to dim light when no one walk through at sudden time. And the light will brighten when motion sensor sense someone walk through.
 

PIC 18F4550

Use phase control at the required brightness level in normal circumstances and use a PIR motion detector to detect a movement and trigger full phase angle for full brightness for a predetermined time. Write a program with the said sequence an dprogram the PIC. But its quite easy to do this even without any microcontroller. Just use a standared fan dimmer and connect bias resistors for controllling brightness, through a relay in conjunction with the PIR...Cheers
 

Re: PIC 18F4550

do u need "PIC 18F4550" ??

u can do this simple job by a cheap controller like PIC16F84A
 

well i have a free pic 18f4550 so yeah. use fan dimmer huh. how about setting the light to turn on at a preset time? can this be achieve by using pis 18f4550?
 

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