Design: voltage and ground

[sty2004]

Hi.
I want to know how to design the followings..I am stuck with my little knowledge in electronics.

The circuit is composed of two identical parts. Each part has a ground and a voltage supply. When one part has a voltage supply, the current will flow to the other part which is to ground. The same for other part. (Note no need for both voltage supply ON simultaneously.)


Many thanks.

 

[Jack// ani]

I'm not sure if I fully understand your question and what you intend to do here!

But you can tie up grounds together, I assume voltage can be different and can be switched as and when required, so can't be connected together.

 

[Pravinspidy]

kindly explain clearly.... actually... wat u tryin to do... ?? wat is the 2 parts....?

 

[sty2004]

Sorry I should make it more clearly that there is only one wire connecting the two identical parts (the design that I request).

The square box in the attachment is the design I want you guys to help me. It is just like "fill in the box"..

 

[Deepikaaa]

still i am not so clear that what are u looking for this circuit??? i mean what is yr exact ques??

 

[Pravinspidy]

case 1 is the rite choice......

 

[sty2004]

I want to design a simple circuit for controlling voltage of pads in a microfluidics system(using electrowetting technique).

Initially all pads( just some pieces of flat copper but isolated) are grounded. When one of the pads has voltage supply the current will go to other pads (the water drop in between will serve as a wire)then the water drop will move to the pad with higher voltage due to potential difference and electrowetting principle. This is what I want.

---------- Post added at 12:02 ---------- Previous post was at 11:59 ----------

@Pravinspidy

I want the design to satisfy both cases