3DPandoras magnet holder for hall-effect sensors

thingiverse

Before anyone starts complaining, I'm NOT affiliated with 3DPandoras in any way. In fact, I'm not even Chinese, although my German name holds meaning in Cantonese. That out of the way, for any complaints, refer to these links: https://www.kickstarter.com/projects/1258124732/3dpandoras-the-first-full-color-3d-printer-of-powd/comments The official site is: http://www.3dpandoras.com/ Some videos can be found on YouTube: https://www.youtube.com/watch?v=6w0Q7PCouvI DESCRIPTION Magnet holder... Pictures and comments will follow, but for now, it's untested. My guess is that it's a unipolar hall-effect sensor, but without the printer here, it could be something entirely different like a reed. But... The magnet itself is a 5mm diameter, 2mm thick object. A strong magnet with a smaller diameter would have more concentrated magnetic flux, resulting in better hall-effect performance. What does this PCB contain? I don't have access to the board, but the signal is likely digital and should reach a threshold (Schmitt trigger) before triggering a transistor that will close a circuit to an Atmel chip protected by a pull-up resistor.