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Gorf Joysticks.
SavannahLion:
--- Quote from: RandyT on August 14, 2007, 12:19:41 pm ---
--- Quote ---Some people I asked insist on using diodes between the controller and *Wiz. I don't think I would need it since all I really care about is pulling to ground, not whether it's +5v. Except, I think one might need either a diode or small resistor to supress spikes if one wanted to use the joystick in a hotswap setup. Is that correct?
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If you are planning to hot-swap to the interface, it might be a good idea. Probably more to protect the circuit on the Gorf stick than anything else. Some of the older discrete circuitry is kind of sensitive. I've never popped a GP-Wiz49 input, but I have killed at least one 49-way board by popping the connector going to the joystick with power connected.
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Yeah, I kind of noticed the sensitivity. I inadvertantly connected +9v instead of +5v and the resistors were a little warm. Not blazingly hot, but not something I was really comfortable with on a 27 year old board. At least the LM339 happily functions up to +36v.
--- Quote ---Sounds like the ground is common between the light and the trigger switch. Essentially it just needs to be the same as the way the directionals function and it should be ok. Just make sure that the Gorf stick gets its power from the same place as the interface to be safe (i.e. not a wall wart)
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I thought that about the lights and ground myself. But my ohmmeter is showing nothing between the two (err.. three). I suspect the lights have their own circuit. Or maybe the bulbs have popped. Like a dummy, I didn't think to apply +5v to the lights to see what happens. I was too busy trying to figure out where I could order the security bit to take apart the joystick handle so I could see the lights.
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