Hello,
I am working on a home automation device where I need low powered electronics within the electrical box of a household switch. Typically we have the line and the neutral wires available in the box. Therefore a small AC/DC power supply would use the existing 120VAC line as the input to a 5VDC power source as shown in #1 of my attachment. The power supply I would use is the following:
http://www.micropowerdirect.com/Page...%20MPM02V.html
The only problem is that sometimes in my switch box I don't have the line and the neutral wires!! In this case I only have the line and a return wire which will connect to the light. However, in this case, I still need my power supply in the switch box to provide the +5VDC as shown in diagram #2 of my attachment!
I have heard that such issues are possible by using the line wire only. My question is:
- Can someone explain to me how this can be done?
- Does someone know of any off-the shelf power supplies that would handle this connection!
Thanks all for your help