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From: dalloff@freenet.columbus.oh.us (Dave Althoff)
Newsgroups: comp.sys.apple2
Subject: Re: Paddles
Date: 17 Oct 1995 01:03:20 -0400
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(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.
--
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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
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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.