Rob Mitchell Posted March 14, 2016 Share Posted March 14, 2016 Inside the 7800 joystick are two resistors and what appears to be a diode .. What is that for? Quote Link to comment Share on other sites More sharing options...
phoenixdownita Posted March 16, 2016 Share Posted March 16, 2016 It's only 2 resistors afaik: http://www.the-liberator.net/site-files/retro-games/hardware/Atari-7800/atari-7800-joypad.htm Quote Link to comment Share on other sites More sharing options...
Shawn Posted March 16, 2016 Share Posted March 16, 2016 It's a reflector diode. It's overkill and unneeded. Quote Link to comment Share on other sites More sharing options...
Rob Mitchell Posted March 16, 2016 Author Share Posted March 16, 2016 (edited) Thanks .. I wonder why they put the diode there ..? Edited March 16, 2016 by Rob Mitchell Quote Link to comment Share on other sites More sharing options...
Hannacek Posted March 16, 2016 Share Posted March 16, 2016 I looks like the diode was used in the regular 7800 controller, but they left it out of the second controller they made because it was not necessary. Quote Link to comment Share on other sites More sharing options...
Clint Thompson Posted March 16, 2016 Share Posted March 16, 2016 Inside the 7800 joystick are two resistors and what appears to be a diode .. What is that for? What are you up to if I may ask? Quote Link to comment Share on other sites More sharing options...
bratboy_y2k Posted March 22, 2016 Share Posted March 22, 2016 I was looking at getting some arcade control parts and building a controller for 2600/7800. Does this mean I can just do the build and not worry about the resistors and diode? Quote Link to comment Share on other sites More sharing options...
CPUWIZ Posted March 22, 2016 Share Posted March 22, 2016 You don't need the diode, but the resistors are required. 1 Quote Link to comment Share on other sites More sharing options...
bratboy_y2k Posted March 23, 2016 Share Posted March 23, 2016 So that's on every button? As in direction and fire? Will it work normally on a 2600? Quote Link to comment Share on other sites More sharing options...
bratboy_y2k Posted March 28, 2016 Share Posted March 28, 2016 Can anybody tell me the resistor values and which buttons they need to go on? Quote Link to comment Share on other sites More sharing options...
phoenixdownita Posted March 28, 2016 Share Posted March 28, 2016 From the 7800 FAQ on this very site: http://www.atariage.com/7800/faq/index.html?SystemID=7800#cat2_9 Joystick Pinouts 2600/7800 pinouts: _________________ \ o5 o4 o3 o2 o1/ \ o9 o8 o7 o6 / \___________/ pin # 2600 control 7800 control 1 WHT- Up WHT- Up 2 BLU- Down BLU- Down 3 GRN- Left GRN- Left 4 BRN- Right BRN- Right 5 unused RED- Button (R)ight (-) 6 ORG- Button ORG- Both buttons (+) 7 unused (+5v) unused (+5v) 8 BLK- Ground(-) BLK- Ground(-) 9 unused YLW- Button (L)eft (-) 2600 control (button) pin 6 ORG(+) --------------()------------BLK(-) pin 8 Button 7800 control (buttons) /----------YLW(-) pin 9 Button L / /---------()---| YLW splits / \----///-----\ pin 6 ORG(+) -------| ORG splits 620 ohm |---BLK(-) pin 8 \ /----///-----/ \---------()---| 620 ohm Button R \RED splits \----------RED(-) pin 5 Quote Link to comment Share on other sites More sharing options...
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