Negative voltage episode

[glatocha]

Guys,
I know there was an episode when Dave describes, several methods of making symmetrical supply from single battery.
Cannot find it

Please help

[IanB]

There really aren't many ways to do that. You can either use an op amp to create a virtual ground half way between the two rails (for low power needs), or you can use an switcher of some kind to generate additional voltages as needed.

[glatocha]

Yes, you can take the two batteries, or take opAmp, or some bulk converter application. But I watched once the episode, when Dave described it, just cannot find it now

[c4757p]

What do you need it for? For most op amp stuff, you don't really need a true power rail, just a virtual (signal) ground. Just connect anything you would normally ground to a voltage divider instead.

[Excavatoree]

I think you are remembering EEVblog 72. (Right around the 21:00 mark)

[glatocha]

What do you need it for? For most op amp stuff, you don't really need a true power rail, just a virtual (signal) ground. Just connect anything you would normally ground to a voltage divider instead.

I have two application in mind. One measuring, so in this case the virtual ground with opamp would work.
The other is for industrial analog signal +-10V. But here I need to check the requirements for the IC I want to use.