*** Please note i'm new to working with electronics so apologies for the stupid questions, i've done lots of googling and am quite stuck ***
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I'm in the process of building my own dac to control a laser I've projector I've built. The projector works well and I can control it with ilda and existing DACs. Now I'm trying to build my own DAC with a teensy esp32. This has 2 DAC pins which I hope to use for the X and Y galvos.
I'm confused now about how I can proceed as the teensy DAC pins are each 3.3v and I need a + and - signal for both the X and Y galvo.
So what I have is 3.3v X and 3.3v Y and I need a -X,+X, -Y, +Y.
The teensy has a 5v output pin, plus on my laser I have a -15v and +15v power source that is driving the galvos.
From my research I believe I should be using an op amp to amplify and then offset the voltage. Then I need to split this into + and - for both x and y? But I'm finding this really difficult to understand with my limited knowledge.
I forgot to mention, i've been trying to follow this instructable: https://www.instructables.com/DIY-ST...VO-CONTROLLER/
But the schematic is quite complex for me to follow so I'm having trouble converting that to an actual circuit.
Does anyone have any advice to point me in the right direction.
thanks!