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Using the joystick port as general purpose input CIRCUIT (BC

2017-07-13 22:01  
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This article describes the Using the joystick port as general purpose input CIRCUIT (BC548C). The principle is very simple, very practical. The circuit components can help you understand better grasp this principle. For example, in this circuit, you can go to find and buy these components: BC548C. 

FIG5 Using the joystick port as general purpose input