Will parallax repair demo boards? I Have a prop 113 now.
IncVoid
Posts: 40
Well had my first chip fry...poor practice on my part
I think I was over running my chip with a 12-15 vdc power supply into the prop demo board that clearly says 6-9 vdc
Seemed to be fine, the "stock" demo was fine until I used electrical tape and stuck a knock off snes pad to it.
clock, latch, data, gnd, vcc and an extra line called dv which I went to ground Plugged them into the demo board pins 0-2 for clock latch and data...
went to load the prop via usb and got a bad checksum...then tried to identify the prop(after untaping and unplugging) I get 113 back.
I'm pretty sure it is[fried] because I didn't use current limiting resistors between the prop and the gamepad on those 3 lines. I should of even used one on the dv line to ground. Maybe it is because I had a short somewhere between the two boards.
Or somehow the power brick was "running hot" but I used the multimeter on the regulator outs and they were fine at 5 and 3.3 I'm pretty sure.
The gamepad has some 14066b on it, I'm guessing the "dv", was to switch between "snes" mode and regular "nes" mode or something along those lines.
Probably sourced/sinked too much and burned it. No smoke, no smell, no discoloration.
Back to my main question. If I drive up to rocklin you think they'd swap me demo boards for a small fee(smaller than buying a new one)? Can they recycle this dead board and put a new prop on it? I'm kicking myself for not putting in resistors just to be safe...millimeters away the white experiment board sockets were empty waiting to be used.
I'll call them in a few hours and see what options there are.
If not I'll just eat the 60$ and get a new board. the chip is so small and my solder work is terrible so I can't just "pop" it off and put a new one in.
I think I was over running my chip with a 12-15 vdc power supply into the prop demo board that clearly says 6-9 vdc
Seemed to be fine, the "stock" demo was fine until I used electrical tape and stuck a knock off snes pad to it.
clock, latch, data, gnd, vcc and an extra line called dv which I went to ground Plugged them into the demo board pins 0-2 for clock latch and data...
went to load the prop via usb and got a bad checksum...then tried to identify the prop(after untaping and unplugging) I get 113 back.
I'm pretty sure it is[fried] because I didn't use current limiting resistors between the prop and the gamepad on those 3 lines. I should of even used one on the dv line to ground. Maybe it is because I had a short somewhere between the two boards.
Or somehow the power brick was "running hot" but I used the multimeter on the regulator outs and they were fine at 5 and 3.3 I'm pretty sure.
The gamepad has some 14066b on it, I'm guessing the "dv", was to switch between "snes" mode and regular "nes" mode or something along those lines.
Probably sourced/sinked too much and burned it. No smoke, no smell, no discoloration.
Back to my main question. If I drive up to rocklin you think they'd swap me demo boards for a small fee(smaller than buying a new one)? Can they recycle this dead board and put a new prop on it? I'm kicking myself for not putting in resistors just to be safe...millimeters away the white experiment board sockets were empty waiting to be used.
I'll call them in a few hours and see what options there are.
If not I'll just eat the 60$ and get a new board. the chip is so small and my solder work is terrible so I can't just "pop" it off and put a new one in.
Comments
I see a lot of that lately - "would of", "should of", "could of".
It must come from "Whole language", Look - Say.
Also gonna take this as a sign that I should be working on my other project on my hydra, not a big fan of making another thread so here goes.
I understand if I want to frame sync with the tv driver I can wait for the tv_status var to go from visible to invisible and update video ram hopefully fast enough, waiting for the new changes to be displayed by going visible.
But the tv driver does not seem to tell me what line it is actively drawing.
I can roughly see the :tile loop with an x and the line loop with y. wondering if (too much wondering not enough trying) it wouldn't mess up the timing by squeezing some wrlongs in there before the waitvid.
That way I can easily tell what tile an yline is being drawn on the screen. Got an old black and white tube tv and the hydra and a nes lightgun laying around... I understand the algorithm was to fill the tv in with black, then white and as the electron beam makes those nice phosphors bright, the light gun would trigger high. Counting from when the frame was first displayed to when the gun detects light would yield a time, which you could deduce where it was pointed.
But I can't exactly tell what is the total time for the screen to fully display. I suppose I could try to get an average of all the visible to invisible times and go with that. I don't know which would be the easier solution.
The NES style hack depends on being able to know current scan line,but that's a problem because a WR-Hub takes 7 to 23 cycles depending on where the Hub is when you issue the instruction. This makes Hub accesses a real problem in video drivers, and it's quite a challenge just to recover a character cell and then the bitmap line it represents in real time.