Was going to say what Shiru and rainwarrior said, but they already said it. My "alternative" theory is that the NES was a kid's console and that they avoided using a sawtooth wave because sawtooth waves are sharp, and the kids might get hurt.
1,217 Jul 5, 2012 8:52 am
Re: Why does the NES have a Tri wave rather than saw wave (48 replies, posted in Nintendo Consoles)
1,218 Jul 4, 2012 4:52 pm
Re: FS: Amigas, Ataris, Apple IIc, Sinclair 1000, Speak and Spell (5 replies, posted in Trading Post)
Sorry to be quite the killjoy, but I had to edit the title...
1,219 Jul 3, 2012 10:34 pm
Re: lsdj, paid for rom, wheres the dl (3 replies, posted in Nintendo Handhelds)
CartRIDGE. And yes, you need to wait for Johan to manually process the order and add a login for you.
1,220 Jul 2, 2012 3:07 pm
Re: xchanger/transferer programming details? (7 replies, posted in Nintendo Handhelds)
Mindless: You need to use the so called vin pin (pin 31 on the cartridge slot) instead of /wr to perform a write to the flash chip.
1,221 Jul 2, 2012 12:08 am
Re: xchanger/transferer programming details? (7 replies, posted in Nintendo Handhelds)
Check the datasheet for the specific flash chip on the cartridge I believe most EMS carts are usin Intel flash, like 28F320.You write a certain byte sequence to erase, enter programming mode etc. If you still need help, asl.
1,222 Jul 1, 2012 9:51 pm
Re: Battery Life? (12 replies, posted in Nintendo Handhelds)
Frostbyte: Yeah, with an AAA sized Li-Ion battery and a spacer.
1,223 Jul 1, 2012 8:40 pm
Re: Battery Life? (12 replies, posted in Nintendo Handhelds)
Aeros, if it has a backlight, I'm not sure that's true... (Compared to non-BL GBC)
1,224 Jul 1, 2012 7:20 pm
Re: PISSbox - Real time noise cancelation (56 replies, posted in Other Hardware)
egr wrote:
I"ve been trying understand "transformer isolated" but since the transformer is before the summing resistors I didn't think it would be a benefit?
OH so this is a single tap transformer that you're using just as an inverter. Then there's the risk that you'll get a phase difference and/or difference in amplitude between the positive and negative signal. And the tranformer is sensitive to picking up certain noise. In the end, you may get more noise than you started out with.
I'm having difficulty reading the schematic from the board. In part because I can't see the bottom side, in part because the solder mask makes it difficult to see the traces. For example, I can't see that jack one is connected anywhere at all (except for to the big ground plane). No traces as far as I can see, and no vias to the other side. Would you mind providing the schematic?
1,225 Jul 1, 2012 6:13 pm
Re: PISSbox - Real time noise cancelation (56 replies, posted in Other Hardware)
My point about single sided boards is that when you have a heavy component like a transformer, you want to place the component on the opposite side of the copper, for mechanical stability. If you have it on the same side, the weight from the transformer could lift off the copper.from the board. So for a single sided board, this limits your choices to having the jacks (SMD) on the opposite side to the transformer.
Anyway, see my idea about galvanic isolation, i.e. not connecting the two sides of the transformer.
Or, replicating basically the same effect as this mod by connecting the stereo output to a balanced mixer input.
1,226 Jul 1, 2012 5:47 pm
Re: PISSbox - Real time noise cancelation (56 replies, posted in Other Hardware)
12ianma wrote:
Your soldering lacks flux, probably not a skill issue.
Yeah, and shitty iron. Those "pegs" sticking out of the solder joints are a tell-tale sign of this. I can't stand a 30 W iron that looses its heat as soon as you touch a joint. You need a reasonable quality temperature controlled iron. Something like a Weller or a Hakko. Of course, a lot of it is technique, like preheating the component before applying the solder, applying flux if needed or using flux core wire as well as keeping the tip clean. My preferred method for this is using a brass sponge, rather than a wet sponge.
^ Soldering micro tutorial
Anyway, if I'm understanding this correctly, it's a center tap transformer, where you drive the outer sides with left and right. A couple of thoughts: This is a double sided board right? I'm almost certain it could be optimized to use only one side. However, this probably wouldn't be much use since the jacks you're using are SMD and you want all components on the same side. Are the two sides of the transformer galvanically isolated? This could be an added benefit from using this circuit, if designed properly. Yet another, more expensive idea (both in terms of components and design) is to make the circuit active by using an opamp as a differential amplifier, driven by phantom power.
Or, yet another idea (Sorry for killing this darling early by thinking for a minute) hook up a 3.5 mm jack so that it connects to a balanced input. I guess this is as simple as using a 3.5 mm -> 6.35 mm ("1/8" -> 1/4) stereo cable, given that the mixer has a 1/4 in balanced input jack. So there you go...
1,227 Jul 1, 2012 12:26 pm
Re: reducing WAV channel sample noise? (15 replies, posted in Nintendo Handhelds)
Could you send me the song and LSDj ROM (so I can see your samples) to [email protected]?
1,228 Jul 1, 2012 3:24 am
Re: Email problem (6 replies, posted in Bugs and Requests)
e.s.c., yes the address should work, and be forwarded to me and and trash80.
1,229 Jul 1, 2012 3:23 am
Re: Email problem (6 replies, posted in Bugs and Requests)
I believe this one requires the attention of Mr 80. I'll forward the issue to him. If you still need help with something, pm me. (Or, if it's a moderation issue, click the report link to the thread you want to report.)
1,230 Jul 1, 2012 2:16 am
Re: dumb question- where is lsdj download? (18 replies, posted in Nintendo Handhelds)
Always make regular backups, though.
1,231 Jun 30, 2012 1:46 pm
Re: Need logo redone (76 replies, posted in Graphics, Artwork & Design)
The hardest bit in doing that is reading and converting the graphics data. Currently, I'm using an old DOS program for the conversion. I'm planning to write a replacement for this program, and maybe I never actually will. But if you have any other images you want converted, within reason, I can do it for you.
1,232 Jun 30, 2012 10:10 am
Re: Need logo redone (76 replies, posted in Graphics, Artwork & Design)
Since nobody asked, I threw together a Gameboy viewer for these images. Left/right to select image. A to invert the image, if you want to do that for whatever reason.
http://www.gg8.se/temp/maize.zip
Yep, I even included Ultramega's sketch, even if it looks a bit corrupted because information is missing at the bottom.
This ROM might be useful if you want to show one of these logos on a modded Gameboy for sale. But make sure you get permission from the respective logo creator etc.
Edit: Perhaps I should mention that I modified R4C7's logo slightly to make it work better with the GB screen resolution. I included two versions of it, one where the logo part was resized with the HQ2X algorithm, and one where it was resized *2 with pixelated (nearest neighbor) ersizing.