a little help with capacitive power supply values

[Dennis]

Hi Adam

Thanks for the advice and heads-up !.. I promise to wear rubber gloves and have lots of back-up components for the smoked ones and will keep a fire-extinguisher handy.

It's gotta be more fun that flying a kite in the rain with a key attached to the string and waiting for the odd lightening bolt though :-)

Kind regards
Dennis

PS .. Adam ...what interesting posts !
thanks for pointing them out to me ...and I too was confused by the App Note author's use of ground and circuit ground ..especially regarding the 3-wire system.

What I would like to accomplish is a PIR/LDR controlled security light switch using a PIC , the PIC ciruit is powered from the mains and on 'sensing ' movement or light supplies mains to the light.
Something like this

MAINS ------------|PIC circuit| ----|LOAD
| PIC port
|
Live |__________-----_________|LOAD
Neutral |_______________________|LOAD