Hi,
I am exploring the world of diy gates, triggers, dividers mostly. I am a beginner so really first copying stripboard images then trying to understand it and add a little tests. But I have some tutorials in 5 volts. But currently, closer in +9v-GND, and then closer I have finished circuits with +12-GND but I would like to add the -12. Would I have to start the whole circuit or can I take some elements, pass them into an OP AMP and get the desired voltages?
Thanks in advance!