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1.) The diagram starts with the student uploading their code to the KL25Z via USB
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2.) Once the code has been uploaded to the KL25Z the user has the option to start the program, swap images, and end the program using the attached buttons.
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3.) The galvo board requires a +5V to -5V input signal so to achieve that the KL25Z must use a DAC that is routed through a differential operational amplifier circuit.
3.) Since the KL25Z only has one true DAC, a second DAC must be created. To do so I sent a PWM signal through a low pass filter to turn it into an analog voltage before sending it to the diff amp.
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