I would have the following question:
I would like a sine wave voltage that is generated by an Arduino Uno via PWM (or DDS) and then brought to a level of -2.5V to 2.5V with a capacitor from the 0V to 5V range, to a level amplify from -5V to 5V.
I have for this purpose an op-amp in non-inverting amplifier circuit provided, more specifically a LM358.
Regardless of which model, need an Op-Amp, to my knowledge, always a supply voltage which is at least as large as the voltage range to which it is to reinforce, so in my case a symmetrical supply of at least -5V and + 5V ,
Actually, you would need a bit more to get exactly the amplitude of the output voltage from -5V to + 5V, but that’s not so important in my case so the gain factor does not have to be exactly 2.
Therefore, I would use for the + 5V supply of the Op-Amps the 5V output pin of the Arduino Uno (which in turn is powered by the intended power supply).
The question now is if I (provided the maximum power delivered by the
5V pins allows) just a parallel tap on a CMOS level converter as the TL7660 can do and take me from this the -5V for the negative supply of the Op-Amp.
As I mean it exactly, the attached sketch can be found.
Has anyone ever happened to have a similar configuration, as in my attached sketch, in operation and could tell me if such a thing (sometimes quite independent of the dimensioning of the circuit) could work or not?