I am trying to power a circuit with two op-amps that require multiple voltages. The voltage requirements are -14v, +14v, ground/24+. I am trying to power this circuit from a 12vdc power supply.
I am using a 14vdc to 24dc boost module to obtain 28v and a rail splitter circuit to create a virtual ground for the -14v and +14v and its working. I am using 24v from the dc to dc boost to supply the board for the 24vdc requirment.
The problem I am having is the input/output negative(common) from the power supply through the DC TO DC board connects to the virtual ground circuit input and output 14v-. This rail cannot connect to the negative ground common, this is my problem.
So my logic is to isolate the dc to dc input from the output and this will in turn eliminate the -14v from being connected to the 12v negative ground common?
I think this will work but how can I achieve this? I already have the dc to dc board and the virtual ground board. Is there a simple electrical circuit I can make to add isolation or a whole other idea that doesnt require me to have to use a dc to dc board that has isolated negative input/output?
Any suggestion would be greatly appreciated, thank you.