| Electronics > Beginners |
| My negative voltage rail doesn't work |
| (1/4) > >> |
| mheruian:
Hi everybody, for some reason, i learn how op-amps work (e.g. non-inverting and inverting configuration), i even test them on a online simulator and it works. Its just that it doesn't work when i applied it :( why is that? If ever, please teach a beginner like me. I am no genius so a detailed layman's term answers would be so great :) my setup: my simulation: |
| mheruian:
I even tried using two (2) separate +12v supply that were grounded to each other. each +12v supply has one (1) +5v voltage regulator. first +5v voltage regulator acts as a supply only on the op-amp. second +5v voltage regulator acts as an input on the op-amp. still, same results. The +5v input on inverting op-amp doesn't output -5v output. Why is that?? |
| oPossum:
You are expecting an opamp to output -5V when you have only supplied it with +5? |
| mheruian:
Oh?? i see. thanks. so there is no way to create a negative supply using op amp?? :-\ |
| Muxr:
Yes you can create a bipolar power supply with an Op Amp. Basically you can use an Op Amp as a rail splitter in order to create a virtual ground. The ground in the schematic is a virtual ground. This is the ground the circuit using this bipolar supply should reference. The old GND from the battery becomes -6V and the 12V rail becomes +6V. |
| Navigation |
| Message Index |
| Next page |