@bot yep, seems like IRL it only flashes the blue light as it snaps into a supercritical state.

I could have multiple different modes in the final product, but idk yet, might just have a realistic mode and a pulse mode. Since it's using a microcontroller I can change the function of sensor -> brightness to whatever using code

What's being shown in the video is just a Hall effect sensor's output into the chip reading the voltage level, then taking that voltage level and adjusting the light's brightness. Since I'm not interested in measuring the other side of the magnet there is circuitry that cuts the output of the sensor down the middle and stretches it out to 0volts -> max volts