Z-axis optical endstop for ANET A8
thingiverse
D1, Q2 - Photo-interrupter discovered in laser printer\nT2 - KT502 PNP-transistor, substitute - BC327\nR2 - 1 kOhm resistor 0.125W\nR3-R4 - 10 kOhm resistors 0.125W\nI'm not skilled in electronic circuitry, but it functions properly!\nAs you're aware, anet v1.0 lacks open-source code. Endstops inputs configured by INPUT_PULLUP. So, normal state to input Z would be HIGH. That's why I installed T2 transistor.
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