wazzal
Battlezoned
Completed Veccy Bird [1.5]!
Posts: 74
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Post by wazzal on Jul 14, 2015 5:05:11 GMT -5
I decided to tackle this modification to save wear and tear on my original Vectrex controllers: www.playvectrex.com/vectech/controller.txtAfter wiring everything up and cutting necessary traces, I tested it to find the Down/Left directions do not work properly. The "action buttons" work properly and Up/Right are both accurate on screen. However, when pressing Down, the Vectrex interprets Up; pressing Left will register as Right. I've checked for shorts with the continuity test and so far nothing appears off. Does anyone have any advice as to what the issue could be? |
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Post by binarystar on Jul 14, 2015 5:18:20 GMT -5
you sure you haven't wired down/left to +5v rather than -5v?
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wazzal
Battlezoned
Completed Veccy Bird [1.5]!
Posts: 74
|
Post by wazzal on Jul 14, 2015 19:49:21 GMT -5
Yes, Up/Right is isolated to +5v and Down/left is isolated to -5v.
When testing with the Vectrex Test cart, pressing left flashes to left for a second and then moves to and stays on right. The same is true when pressing down; it flashes down and then moves to and stays up.
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Post by 50tbrd on Jul 14, 2015 20:08:19 GMT -5
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wazzal
Battlezoned
Completed Veccy Bird [1.5]!
Posts: 74
|
Post by wazzal on Jul 15, 2015 14:29:48 GMT -5
Using those images as a reference, my wiring is the exact same albeit on a different board variation. I think I discovered the issue! The 3.3K Ohm resistors I was using were bad. They were "flame proof" resistors, so I must have overheated them while soldering. I've ordered some fresh resistors from Thailand which should arrive in a few weeks. I'll update this thread when they arrive  |
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wazzal
Battlezoned
Completed Veccy Bird [1.5]!
Posts: 74
|
Post by wazzal on Jul 26, 2015 14:41:39 GMT -5
UPDATE: The new resistors arrived, I soldered them in, and the directions now work perfectly! |
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Post by mountaingoat on Jul 30, 2015 20:08:23 GMT -5
Nice.
I was going to recommend checking the voltages with a multimeter to make sure you get the -3.X V when the left / down are pressed.
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Post by Nic Lobo (pucpuc) on Aug 5, 2015 12:44:28 GMT -5
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