I want to guess that you grounded something. Double check all of the parts you worked on to see if a ground point happens to be touching any of the sound terminals.
930 Jan 21, 2014 4:40 am
Re: Variable clock for NES? (13 replies, posted in Nintendo Consoles)
MostlyToast wrote:
A higher quality switch won't have as much noise/resistance which lowers the chance of a crash when switching between clock speeds.
If indeed it is noise causing the problems. Take for example your LTC clock trace, which overlaps with the defulat clock. If the leading edge of your default clock occurred after the leading edge of the LTC, say for example only 1ns afterward, then the microcontroller may see this as 60MHz as opposed to the 33Mhz, or 4.193MHz.
931 Jan 21, 2014 3:20 am
Re: Variable clock for NES? (13 replies, posted in Nintendo Consoles)
DMGer wrote:
So I would be able to deal with a switch but it would be much cooler to have a pot. Would you be able to add this in addition to the switch?
Easily but most systems are prone to sudden crashes when switching between crystals or other oscillators like the LTC1799. That being said, if all you wanted to do was use a regular clock sometimes, then switch off the console and flip the clock switch, then power it back on; you'd be alright. Once you're using the LTC1799 as your clock source, the pot should not crash the system, similar to the gameboy.
932 Jan 21, 2014 12:35 am
Re: Just installed Kitsch-Bent's Fronlight kit into a GBC (49 replies, posted in Product reviews)
DSC wrote:
If you are looking for a true honest review I think you need a side by side comparison with a GBC with a front light from a SP. That is the standard IMHO.
/nods
933 Jan 20, 2014 9:45 pm
Re: FS/T: Arduinoboy || GBA->TV adapter // help? (11 replies, posted in Other Hardware)
Stress on the cable could cause for the wires over time to be broken or frayed. This could cause them to bridge connections nearby or even disconnect completely. Granted your ARboy worked originally, I would check the cable first, then check the seating of your Atmel (if it is socketed) and then check the underside of the board for any cold solder joints on your through-hole components.
934 Jan 20, 2014 8:28 pm
Re: Variable clock for NES? (13 replies, posted in Nintendo Consoles)
Depends on the frequency range you want. 555 timers can be wired in a astable mode which outputs a square wave determined by an RC equation. Make sure you calculate the duty cycle to be exactly 50%.
http://www.next.gr/oscillators/astable/ … l7889.html
But the common method the gambeoy uses is with an LTC1799 IC. It is easier to calculate the frequency range. One pot, and two resistors.
read the datasheet. 
As discussed here though, Overclocking the 2a03 affects both the sound and video. Also the maximums and minimums have never really been tested. A high clock frequency could cause over heating.
935 Jan 20, 2014 5:23 pm
Re: A Deep Look At Gameboy LCDs (9 replies, posted in Nintendo Handhelds)
Try to find yourself an original Grey LCD and a Play it Loud LCD. They have different densities of pixels.
rot wrote:
Hey, while we're looking at macro dmg porn, this is pretty amazing
Excellent Link!
936 Jan 19, 2014 10:40 pm
Re: Gameboy Sound Modification/Effects? (3 replies, posted in Nintendo Handhelds)
Are you interested in just using MGB or would you like to program an interface of your own? For every sound modifying parameter that the gameboy is capable of, read the datasheet. 
http://www.devrs.com/gb/files/gbspec.txt
Attack, decay, sustain, pitch, samples, sweep, and many more.
937 Jan 19, 2014 10:36 pm
Re: Gameboy Sound Modification/Effects? (3 replies, posted in Nintendo Handhelds)
The pots are just fine and coarse tuning of the same parameter if I remember correctly.
938 Jan 19, 2014 5:49 pm
Re: c64 bass guitar (10 replies, posted in Commodore Computers)
Vile wrote:
Jeri Ellsworth is an awesome self taught engineer. There were a few videos around of her at the maker fair with this guitar.
Exactly this. The above video is probably one of her less interesting accomplishments. You are aware of her other Commodore projects, everyone? She alone is in all of my wet dreams.
939 Jan 19, 2014 5:14 am
Re: Special edition/rare DMGs (16 replies, posted in Nintendo Handhelds)
Huh, I did not know that. It does look like the Wario gameboy has a chip in the paint. I find it funny that Nintendo would paint an existing gameboy.
940 Jan 19, 2014 1:51 am
Re: Special edition/rare DMGs (16 replies, posted in Nintendo Handhelds)
I have some speculation about that Kirby gameboy. Kirby's Dream Land is the very first game featuring Kirby. It was released on the gameboy, yes before the NES! He was actually white, not pink. BUT, when they called him Popopo instead of kirby for s short time, he seems to have been pink......idk. I also want to point that that it has no Nintendo logo and has the original pink/light grey buttons as well as the light grey screen cover. I do not think that it is legit. Same goes for the Wario boy.
That being said, I think the heart boy is also painted.
941 Jan 19, 2014 1:28 am
Re: You get the key yet? (7 replies, posted in General Discussion)
PianoGameboy wrote:
And there's rarely an actual game in the system.
exactly right. lol
rygD wrote:
That series is some of the least scary examples of the horror genre, even when I watched it back then...but then again I grew up watching and reading lots of horror.
No way man! Are you afraid of the dark was scary for me, whereas goosebumps was hilarious. I just watched goosebumps this past week and couldn't stop laughing at all of the "aboots." lolCanadians.
942 Jan 18, 2014 10:13 pm
Topic: You get the key yet? (7 replies, posted in General Discussion)
https://www.youtube.com/watch?v=PywyZcclc28
Unmodded gameboy by the light of fire? lol
943 Jan 18, 2014 5:30 pm
Re: Kitsch-Bent.com Updates (latest newsletter!) (1,485 replies, posted in Trading Post)
bitjacker wrote:
shoot. for the sake of experiment it will be good enough for now. maybe if it looks cool a bigger one with built in resistors could be made someday?
Kitsch never sleeps, so I can see it being a possibility.
I front lit an original Gameboy with an AGB-101 screen once and it looked terrible because of the lines on the lighted panel, but it did not wash out the pixels very much at all. I believe I had the screen inverted though.
944 Jan 17, 2014 8:36 pm
Re: MIDIbox SwinSID (83 replies, posted in Other Hardware)
scannerboy wrote:
Also guys remember about your arduinoboys and flashcarts/writers.
Its always gotta be something, right?:P