inthe80s Posted September 11, 2018 Share Posted September 11, 2018 (edited) Don't see this info anywhere about pin 12 other than it is +5 volts (amperage?).....the current draw of the trak-ball is not listed anywhere either. I'm wondering because I'm making a custom controller box and I'm curious about providing power to 3 leds from pin 12. Anyone know of any info on pin 12? Thanks:) Edited September 11, 2018 by inthe80s Quote Link to comment Share on other sites More sharing options...
bohoki Posted September 12, 2018 Share Posted September 12, 2018 all i know is if i wire up pin 12 as the pot common the system switches over to tracball mode i suggest just using pin 9 i'm not sure what its power capabilities are but i would assume under 50 ma 1 Quote Link to comment Share on other sites More sharing options...
Swami Posted September 12, 2018 Share Posted September 12, 2018 Ive found it impossible to find amperage outputs for powered pins on most consoles. I believe I read somewhere about Atari A8 pin 7 amperage changes, but thats about it. Im not sure how to get an accurate reading. I believe the common value is 50 - 100 mA. 1 Quote Link to comment Share on other sites More sharing options...
inthe80s Posted September 12, 2018 Author Share Posted September 12, 2018 (edited) all i know is if i wire up pin 12 as the pot common the system switches over to tracball mode i suggest just using pin 9 i'm not sure what its power capabilities are but i would assume under 50 ma Thanks man, very good info. I wonder what part of the circuit in the 5200 "detects" to switch it over to trak-ball mode? If I still used pin 9 as common(rather than pin 12 for common like you did) for the joystick like normal and maybe that wouldn't flip it into trak-ball mode while taking the +5(from pin 12) to a led/resistor circuit(and in-line fuse for safety) and use pin 15 for ground. The trak-ball HAS to pull more amps with it's pcb loaded with chips and two opto sensors than what was probably used for the regular controllers. I would think pin 12 would have more juice just to run the trak-ball. Ive found it impossible to find amperage outputs for powered pins on most consoles. I believe I read somewhere about Atari A8 pin 7 amperage changes, but thats about it. Im not sure how to get an accurate reading. I believe the common value is 50 - 100 mA. Thanks for the info Swami. I'm thinking the amperage for pin 12 would have to be substantially more to run the trak-ball given that it has like I said a pcb/chips/opto sensors... I just want to power 3 leds. Edited September 12, 2018 by inthe80s Quote Link to comment Share on other sites More sharing options...
SoundGammon Posted September 12, 2018 Share Posted September 12, 2018 According to the schematics, the 5 volt supply to pin 12, comes directly from one of the 5 volt regulators! Should be no problem powering the leds. 1 Quote Link to comment Share on other sites More sharing options...
inthe80s Posted September 12, 2018 Author Share Posted September 12, 2018 According to the schematics, the 5 volt supply to pin 12, comes directly from one of the 5 volt regulators! Should be no problem powering the leds. TY!! I can solder and do full restores on arcades(restored a Tempest)...but I'm not skilled as to read schematics like that, that's a big help. Thank you so much. Quote Link to comment Share on other sites More sharing options...
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