Path: news.uiowa.edu!chi-news.cic.net!uwm.edu!math.ohio-state.edu!pacific.mps.ohio-state.edu!freenet.columbus.oh.us!not-for-mail From: dalloff@freenet.columbus.oh.us (Dave Althoff) Newsgroups: comp.sys.apple2 Subject: Re: Paddles Date: 17 Oct 1995 01:03:20 -0400 Organization: The Greater Columbus FreeNet Lines: 27 Message-ID: <45vdeo$c0n@acme.freenet.columbus.oh.us> References: <38133725.110409771@mit.bison.mb.ca> <45ree4$eqm@gap.cco.caltech.edu> <45rism$e2@gap.cco.caltech.edu> NNTP-Posting-Host: acme.freenet.columbus.oh.us X-Newsreader: TIN [version 1.2 PL2] (Q: Can one obtain Apple ][ paddles) You could build your own...they are extremely simple. The toughest part is finding a 150K-ohm linear potentiometer. The circuit is something like this... 150k ohms +5v-------------------/\/\/\/\/\/\--------| ^ | PDL(n)---------------------| | | Gnd---------------------------------------- | | | PB(n)_____.---._____| Okay, so as a schematic, it's pretty awful. And the button input might need to connect to +5v instead of ground; it has been a long time since I built mine. But you get the idea. If you need the pin-outs of the game connectors, I have those around here someplace. --Dave Althoff, Jr. -- /-\ _ _ __*** Closed for the season *** /XXX\ /X\ /X\_ _ /XX\_ _ _ _____ /XXXXX\ /XXX\ _/XXXX\_ /X\ /XXXXX\ /X\ /X\ /XXXXX _/XXXXXXX\__/XXXXX\/XXXXXXXX\_/XXX\_/XXXXXXX\__/XXX\_/XXX\_/\_/XXXXXX Path: news.uiowa.edu!chi-news.cic.net!newsfeed.internetmci.com!news.mel.aone.net.au!inferno.mpx.com.au!metro!cassius!adrianw From: adrianw@cassius (Adrian Whichello) Newsgroups: comp.sys.apple2 Subject: Re: Paddles Date: 19 Oct 1995 23:52:22 GMT Organization: Electrical Engineering, University of Sydney Lines: 15 Distribution: inet Message-ID: <466obm$6bl@metro.ucc.su.OZ.AU> References: <45rism$e2@gap.cco.caltech.edu> <45vdeo$c0n@acme.freenet.columbus.oh.us> NNTP-Posting-Host: cassius.ee.su.oz.au In article <45vdeo$c0n@acme.freenet.columbus.oh.us> dalloff@freenet.columbus.oh.us (Dave Althoff) writes: >(Q: Can one obtain Apple ][ paddles) > >You could build your own...they are extremely simple. The toughest part >is finding a 150K-ohm linear potentiometer. Other values can be used, provided you compensate by changing the 0.022uF capacitor to maintain the same RC time constant (which is 150Kohms x 2.2nF = 3.3ms with the supplied values). It's easiest to do this be decreasing the R and then connecting a suitable capacitor from the wiper arm of the pot to ground in your homebuilt paddle box, to avoid having to replace components on the Apple motherboard. I did this with a couple of RS joystick controllers (100Kohm) I picked up for two dollars, by putting in an extra 1.1nF capacitance. Adrian.