bugfight
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Posts posted by bugfight
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ok, i think we might have had a misunderstanding here.
seeing your schematic would help, and you don't need to worry about copyright, but should post it here, not on an external site...
but i think i get where you are going: with only single color leds, you could get away with connecting left and right rows both to the same DEFAULT_SRM_DOUT_CATHODES1 pin. i thought you were planning to connect switches and sink transistors to the same pin...
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woohoo!
i better get that core32 finished...
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...
2.:
As I use use sink drivers I will not use register "DEFAULT_SRM_DOUT_CATHODES2" and define it as Number 0,
All buttons and all LED cathodes are connected to "DEFAULT_SRM_DOUT_CATHODES1"
while this can be done, it will require circuit and/or code changes, and i would avoid it...
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4.:
Point 1-3 made me save some registers, to save a DOUTX4 module i only have to change the
register number in setup_mbseq_v3.asm and nowhere else, (besides recompileing)
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no this is not true. with sink drivers the pins have to be inverted (using the mask you mentioned)
thus the button rows are high while the led rows are low and vis versa...
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you might have a ground loop with your computer via the midi device...
but this would be a problem regardless of what app is uploaded.
it could still be hardware if the serial outs try to draw too much only when an app uses them...
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this sounds like hardware problem, maybe your supply is acting up only when you draw more power. try starting with a core and lcd only, with nothing else connected, if that works add one thing, etc
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hehe some important details there...
a box will help for sure, but you'll want a hole to let the hydrogen out. this only happens while charging so you could charge it and then install it... i'd still use a box though, i've only seen two car batteries explode this way, but that was enough to scare me. since it can happen, it's good to take reasonable precaution...
re: thick cables, it seems you'll want those for 220v anyways...
i have an led flashlight that throws a beam several blocks, brighter than any of my regular ones...
maybe consider getting some of those in bulk and replace the switches with relays or likesuchas...
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thems the ones. no need for both. he sells pcbs separately as well as with kits. using both footprints allows user a choice.
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yes, exactly as indicated on the c64 optimized diagram
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i'm not mad, no worries, it's just unlikely for folks to help if you take a shot at someone...
yes as long as you stuff the power supply components on the sid module you will be fine with 9vac
remember not to do so on the core, though, since the c64 psu outputs 5vdc regulated already. check this with a multimeter, though, these guys are prone to failure. you should see 5vdc (or very close). also check it under load
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i almost didn't post this, because of your earlier comments about help, but in the interest of saving a few sids:
the c64 psu puts out 9vac not dc, you will zap your sids if you connect that to them.
it would be good if you assume there's a good reason for the recommended circuits, until you know enough to question why...
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having the blm above the displays is no real problem, you don't really need feedback from the displays while tapping those buttons. i think that's kinda the point of having them, aside from the bling...
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excellent. send to me for testing.
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could it be because he supplies resistor packs (5 or 6 pin SIP) instead?
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reconsider strapping a homebrew 220v system on a person, unless you want them to fry. even if you get lucky there, the heat may kill...
why not leds?
the battery will need to supply the necessary power regardless of final voltage, so your current out of the battery will be high anywayz. unless you are driving very long lines, the transformer efficiency will actually increase your power requirements.
car batteries are not designed to handle repeated charge/discharge cycles. you'll want a marine battery instead.
lead acid batteries give off hydrogen when they charge, and can explode if an internal short happens. this is especially nasty because of the sulfuric acid.
dc thru a transformer will not work, you need an ac inverter or likesuchas for that.
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excellent demo, thanks!
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isn't there already likesuchas?
also svn is a better place to store them...
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mmmmm happy knob cranked....
xavyV5smvdI
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lol, i wanna win a granny award!
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i have a few 5101's but haven't used one in a midibox yet. it works very well in my echoplex digital pro, though - no noise and far less heat than the 2 7805's it replaced. the device went from egg-frying temperature to cucumber cool. there's no reason to think it won't work fine in this application too...
but if your midibox is all digital, there are cheaper ways to go
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ok, sorry, i thought the table was different.
still, i wouldn't call it a stereo pair if it was never used for stereo...
anywayz, i'll stick to matching pairs
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in addition to the issues sep mentioned, since the application needs different compile switches for 6581 and 8580/6582, and both sids are connected to a single core, mixing them on a stereo pair is not a good idea...
mixing them in an 8 sid configuration, however is very nice...
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just use two opamps, with the x biased so that 580r=0v and gain set for 900r=5v
same with y but 120r and 300r ...
you'll probably want one that can use single supply and can go nearly rail to rail, so you can use 5v supply.
iirc the lm324 would work...
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get your tinfoil hat back on, or the men in black will get you...
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would you mind to consider telling us what exactly you mean?
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i meant if you think the load is not balanced, you should map out the paths the current takes for the 2 halfwaves (when x1-1 potential is higher than x1-3 and when x1-3 is higher than x1-1) and see for yourself.
i thought it was a rather clever design when i realized this, if only because i would not have thought of it...
going with 2 bridges would almost require a dual secondary, but these are more common (in equal v) nowdayz than a real center tap, maybe because centertaps prefer a balanced load and most designs use more on the + side. btw, for those that don't already know, the commodore c64 tx is a dual 9v ...
toneburst Builds An MB-6582
in MIDIbox SID
Posted
buncha fargin liberals!