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for PS2 joystick joysticks standard interface module electronic building blocks and 2.54mm pin interface leads.
Phillips is a two-way rocker 10K resistor, with the joystick in a different direction, tap the resistance vary. This module uses a 5V supply, the original state X, Y readout voltage of 2.5V or so, when pressed with the direction of the arrow, the readout voltage values ??with increasing, up to 5V; press the arrow in the opposite direction, the readout voltage reduction , a minimum of 0V.