My NES Zapper Lightgun interface for a PC

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: Hi, : Here is the prototype that I have used to interface : a NES Zapper Lightgun to my PC. : The goal of this electronic circuit is to boost : the signal of the gun (2 PNP transistor 2N3906), : filter the signal (CMOS 4093 ) and : trigger Switch 4 of the Joystick A port (CMOS 4066). : The gun trigger switch is connected to the Switch 1 of : Joystick A. : I have not tried to make a base to hold the gun. : Ideally the gun can be attached to a base and to : detect if the gun is moved from left to right or moved : up or down, you must use 100 kiloOhm pots. : Note: Mame simulate a video card that have a 60hz : refresh rate, so to increase the gun precision, : the monitor must also have a refresh rate of 60hz. : For those having a TV in their cabinet, the TV already : have a refresh rate of 60hz. : The next step is to make a base for the gun and to modify Mame : drivers to accept Joystick Switch 4 and to modify the emulated light : gun to accept the NES Zapper one. : I think that this circuit can be easily modified to interface most : lightgun to a PC. (usually a light gun need power , have a trigger and have an output). : Switch 4 is trigged when the gun see a white spot : (as small a a dime at four feet) on the TV / monitor. : Switch 1 is already implemented in Mame. : Here is the URL: : http://server36.hypermart.net/regisma/NES_Zapper_Lightgun_PC_Interface.GIF : Do not hesitate to contact me for more info... : thanks : Reg : regismalt@netscape.net

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