🚀 go-pugleaf

In a previous article, then@snakemail.hut.fi (Tomi  H Engdahl) says:

>In article <693@thunder.LakeheadU.Ca> dnwangus@flash.LakeheadU.Ca (Dave Angus) writes:
>
>>I'm not much good at drawing schematics in ASCII, but here's the
>>schematic (more or less) from the Computer Shopper article.
>>The article was written by George Toft.  Any errors or mistakes
>>are mine.
>
>Because the circuit uses relays and connects to the computer, there 
>is a danger that the high voltage spikes generated by relay coil
>can cause harm to the computer circuits. When the current in the
>relay coul is switched off, a high voltage spike is generated in 
>the coil. It would be a good idea to add a reverse-biased diode
>in parallel with the relay coil to avoid those spikes. The diode 
>can be any common type, for example 1N4148 or something like that.
>Some special relays have internal diodes for that purpose.

Here is an even easier circuit design.  Who needs a relay?
just use a normally closed switch instead of a normally
open one for the right movement control.  This actually might
work perfectly on one of those EPYX joysticks.  If I remember
correctly, the switches inside were the type that had three
terminals, NO, NC, and a common.  Even if the ones inside
didn't you could replace them (hey, this is getting
expensive!).  Say, how much is a Gravis Gamepad?! ;-)
 
 
          O-------o-----------
                  |           |
                  |           |
                  |           \
                  |           /
                  |           \
  Normally Open   o |         /
  SPST switch       |---      |
     (LEFT)       o |         o-------
                  |           |       |      Normally Closed
                  |           \      |o      SPST switch
                  |           /      |----      (RIGHT)
                  |           \      |o
                  |           /       |
                  |           |       |
          O-------o-----------o-------
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