Path: news.uiowa.edu!news.physics.uiowa.edu!math.ohio-state.edu!howland.reston.ans.net!newsfeed.internetmci.com!news.kei.com!nntp.coast.net!lll-winken.llnl.gov!fnnews.fnal.gov!nntp-server.caltech.edu!nathan From: nathan@cco.caltech.edu (Nathan Mates) Newsgroups: comp.sys.apple2.programmer Subject: Re: TTL Date: 31 May 1996 07:44:49 GMT Organization: California Institute of Technology, Pasadena Lines: 53 Message-ID: <4om81h$ap6@gap.cco.caltech.edu> References: NNTP-Posting-Host: accord.cco.caltech.edu In article , Donald 'X-caiver' Pattee Jr wrote: >I was trying to use my gamepot (In my GS) to drive some little relays...I >know I have my program correct and I know I am using the correct addresses >because the inputs are working). To test I tried to just drive an LED with >the outputs (which according to teh manual, should work). I know which pins >the annunciator outputs are in, but where is 'ground' or whatever I should >clip the other end of my LED too, at? Shameless plug: the following is a cut & paste job off my Apple II Resources WWW pages, specifially the 'general questions' page at http://www.ugcs.caltech.edu/~nathan/a2stuff/generalques.html Apple 16-pin DIP socket (on the motherboard): ==================== | | 8 | * * | 9 7 | * * | 10 6 | * === * | 11 5 | * | * | 12 <-- Notch on socket 4 | * | * | 13 3 | * === * | 14 2 | * * | 15 1 | * * | 16 | | ==================== Pin 1 - +5V Power Pin 2 - Pushbutton 0 Pin 3 - Pushbutton 1 Pin 4 - Pushbutton 2 Pin 5 - Strobe Pin 6 - Game Control 0 Pin 7 - Game Control 2 Pin 8 - Ground Pin 9 - No Connection Pin 10 - Game Control 1 Pin 11 - Game Control 3 Pin 12 - Annunciator 3 Pin 13 - Annunciator 2 Pin 14 - Annunciator 1 Pin 15 - Annunciator 0 Pin 16 - No Connection Use pin 8 for the ground. Nathan Mates -- <*> Nathan Mates http://www.ugcs.caltech.edu/~nathan/ <*> # And he said to them, "To you has been given the secret of the # Kingdom of God, but for those outside, everything comes in # parables" Mark 4:11, NRSV