Looking for power supply for PIC without transformer

[ful babu]

i want a transformerless power supply where i'll be using a PIC12F629 at 4MHz , a 12V relay and a LED at a time..,.,,

can any one suggest me which wud be better solution, capacitive , resistive or any other convenient low cost solution ???

thx

 

[SphinX]

supply for pic

Salam,

https://ww1.microchip.com/downloads/en/AppNotes/00954A.pdf

Bye

 

[IanP]

transformerless power supply microchip

For small-currents applications (<100mA) I would suggest energy-efficient capacitive transformless power supply.
In the application note from the previous post you can find all desription on how to calculate such a powere supply.
My only one suggestion is that you use all voltage dropping components on the L(ine) not on N(eutral), as in some countries N(eutral) is connected to EARTH and it is just safer.

Ans i am pretty sure you are aware of danger exposure to non-isolated high-voltage power line !!!

 

[ful babu]

Re: Power supply for PIC

Salam,

h**p://ww1.microchip.com/downloads/en/AppNotes/00954A.pdf

Bye

olaikum assalam orahmatullahi obarkatuhu,

i have seen the paper already , i wanted suggestion regarding tat, how much wud a PIC 12F629 , a 12 V relay and a led will consume is it less then 100 ? i m not sure .,.,.,