How to isolate two 9 volts outputs coming from the same battery or power supply?

[O.Binette]

Hi,

How to isolate two 9 volts outputs coming from the same battery or power supply?

Ideally I would like to isolate them for AC and DC, but just blocking AC would be OK.

Thanks!

[smallbearelec]

Can you explain a little more about what you need to do and why...like what you want to power?

[R.G.]

How to isolate two 9 volts outputs coming from the same battery or power supply?

Ideally I would like to isolate them for AC and DC, but just blocking AC would be OK.

Steve is right - what are you trying to do?

And, I guess, what do you mean by "isolate"?

That could mean:
- DC goes to each of several outputs, but cannot cross between the outputs. You do this with one diode out of the battery toward each output
- DC goes to each of several outputs, but cannot come back through the battery between outputs. You do this with a big inductor which acts like a low DC impedance but high AC impedance
or it could mean
- both/all outputs get 9V, but are not connected to the same battery by one or more wires; this is what you'd do if you were trying to , for instance, have multiple grounds at different DC voltages. That needs a transformer inverter/converter of some kind.

[O.Binette]

Hi,

Well I would like to power two transistors from the same battery, without having an AC contact between them.

Thanks!

[smallbearelec]

two transistors from the same battery, without having an AC contact between them.

Still not clear what you have in mind. Two X one-transistor amplifier stages?

Another way to ask it: What will the input device(s) be? What device(s) will the output(s) feed?

It sounds like you have thought of something you want to do and aren't clear how it's done in the real world. If you can explain what you are looking to accomplish, we might be better able to assist.