There's a bunch of posts about this, but they're all for very specific scenarios. I'm a newbit, and some components, like op amps, require both a positive, and negative voltage.
But how do you get negative voltage?
I'm about to buy what I think are my last "essential" components, an assortment of voltage regulators, and an assortment of logic gates. Aside from a collection of those, I have most breadboard components.
- I've read you could use transistors kind of like a charge pump,
- I imagine you could use wind a transformer 1:1 and hook on the "wrong" sides of the secondary?
- Could you use a NOT gate, or does that give 0 V?
Like from a day to day, really basic stuff, just giving -5 V to an op-amp, how do you get negative voltage?
I haven't played with the op-amp either, but they're everywhere, and I never see how they manage to give it the negative voltage the schematics seem to say it wants/needs...
I'm just putting my kit together, and preparing to embark on projects, so I don't have to order parts, and wait, and it's the wrong part, etc...
I just figure there's an easy way to to it, or there's a part, or collection of similar parts I need to be able to get negative voltage when I need it...
Some parts want +5V and -5V and ground, so I can't just flip +5V and GND, either... can you even do that?
Anyone can help me understand?