I am trying to connect a circuit which needs a +5 V and -5 V input. How can I get both voltages from a Raspberry Pi?
This is more of an EE question than a Pi question, but here goes.
There are many power supply circuits which can convert between +5V to +/- 5V. A quick web search show a bunch of responses (I used google with "+5V to +/- 5V")