Re: Some theory on Optical guns which I have presumed..

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Posted by Jerky on November 12, 1999 at 20:13:53:

In Reply to: Some theory on Optical guns which I have presumed.. posted by Andy Geez on November 12, 1999 at 19:59:37:

: Andy's Lightgun theory..

: Tom about you serial comment, that was a bit strange, its not that we are going to shove loads of information down the line, at most 1200bps..

: This is pure speculation, this is what I presume is required to interface a lightgun to a PC.

: Most lightguns (all I researched) need +5V serial is +12V (that is why we need the +5 power source for the Happs control trackball interface, PS/2 is 5v) so we need to use external power sources (off course if you have a Arcade Power supply or PC supply you'd get your +5V/0V from that).

: Another thing is the way lightguns work is to flood the screen on 60/50hz (60fps) refresh (I believe that Monitors work differently, so it will only work on Arcade Monitors/TVs I might be wrong). The gun driver needs to be polled 60/50 times per second..

: Light guns will not work on any TV that scan coverts the video signal. (hence them not working on PC monitors, the lightguns that work on PC monitors use a different sensor type).

: Theory connecting the wires..

: Here is the wiring from Lethal Enforces light gun (Arcade version)

: 4 | +5v
: 3 | Trigger
: 2 | GND
: 1 | Optic sensor

: Hooking these wires to what comes from a 9pin serial port.. Well we can't use the 12v voltage, so we will use the Ground and +5v from the power supply unit..

: As for the Optical Sensor wire, I believe we connect that to the RxD Recieve Data line (Pin number 2)

: I believe mouse use the TxD Data line Send Data Line.. (infact I am not sure on the Serial port stuff).

: Voltage (not sure on the Pin) nor the Ground (need to get a multimeter on the job).

: The trigger will need to be interfaced differently (via existing input device keyboard or joystick), Personally I'd just a joystick button hack (real simple just get the 15pin cable and plug common gnd and button1) to the trigger.

: The big question is what packet information is the optical sensor going to send (this is where I need help) I think its going to send the screen scanline (where the sensor detected the white flood) and then the xoffset. (could be mistaken), maybe in 3byte format.

: Also lightgun is different to the mouse in the fact it screen position can change radically (top left to bottom right)..

: Well thats my view at the moment..

: Sorry if I made any mistakes, kinda of tired..

: Please feel free to input.

How about the parallel port, It has all voltages that
you need,with-out any added power supply.
The speed is fast too. I wish more people would
look into the option.
Thanks Andy,
Jerky
without needing a

Follow Ups:

Re: Some theory on Optical guns which I have presumed.. Jerky 11/12/99 (6)
- here's your 5v Jerky 11/13/99 (0)
- 50k, sorry saint Jerky 11/12/99 (4)
  - the rest could be found here Jerky 11/12/99 (3)
    - One more...I'm done...good-night Jerky 11/12/99 (2)
      - Re: One more...I'm done...good-night Tom61 11/12/99 (1)
        
        history of the parallel port Jerky 11/13/99 (0)

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Comments:
: : Andy's Lightgun theory.. : : Tom about you serial comment, that was a bit strange, its not that we are going to shove loads of information down the line, at most 1200bps.. : : This is pure speculation, this is what I presume is required to interface a lightgun to a PC. : : Most lightguns (all I researched) need +5V serial is +12V (that is why we need the +5 power source for the Happs control trackball interface, PS/2 is 5v) so we need to use external power sources (off course if you have a Arcade Power supply or PC supply you'd get your +5V/0V from that). : : Another thing is the way lightguns work is to flood the screen on 60/50hz (60fps) refresh (I believe that Monitors work differently, so it will only work on Arcade Monitors/TVs I might be wrong). The gun driver needs to be polled 60/50 times per second.. : : Light guns will not work on any TV that scan coverts the video signal. (hence them not working on PC monitors, the lightguns that work on PC monitors use a different sensor type). : : Theory connecting the wires.. : : Here is the wiring from Lethal Enforces light gun (Arcade version) : : 4 | +5v : : 3 | Trigger : : 2 | GND : : 1 | Optic sensor : : Hooking these wires to what comes from a 9pin serial port.. Well we can't use the 12v voltage, so we will use the Ground and +5v from the power supply unit.. : : As for the Optical Sensor wire, I believe we connect that to the RxD Recieve Data line (Pin number 2) : : I believe mouse use the TxD Data line Send Data Line.. (infact I am not sure on the Serial port stuff). : : Voltage (not sure on the Pin) nor the Ground (need to get a multimeter on the job). : : The trigger will need to be interfaced differently (via existing input device keyboard or joystick), Personally I'd just a joystick button hack (real simple just get the 15pin cable and plug common gnd and button1) to the trigger. : : The big question is what packet information is the optical sensor going to send (this is where I need help) I think its going to send the screen scanline (where the sensor detected the white flood) and then the xoffset. (could be mistaken), maybe in 3byte format. : : Also lightgun is different to the mouse in the fact it screen position can change radically (top left to bottom right).. : : Well thats my view at the moment.. : : Sorry if I made any mistakes, kinda of tired.. : : Please feel free to input. : How about the parallel port, It has all voltages that : you need,with-out any added power supply. : The speed is fast too. I wish more people would : look into the option. : Thanks Andy, : Jerky : without needing a

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