Search found 260 matches

by RxBrad
Wed Jul 31, 2019 10:17 am
Forum: Show-off Corner (Game Boy Zero)
Topic: Gameboy Zero Pi3a - 800x600 Hdmi Screen
Replies: 7
Views: 712

Re: Gameboy Zero Pi3a - 800x600 Hdmi Screen

That screen seems extremely impressive for the price; and seems to be relatively low-effort to get working. I might need to do a 3A+ build of my own with one of these. With some investigation, one would think it'd be possible to hack in some external brightness controls somehow. I've kind of spoiled...
by RxBrad
Mon Jul 29, 2019 6:22 am
Forum: Show-off Corner (Game Boy Zero)
Topic: My New PCB Prototypes
Replies: 74
Views: 12838

Re: My New PCB Prototypes

All's well, and I'm back to enjoying my Gameboy Zero. Thanks for your help, Dividion. Ultimately, it seems that my no-sound/no-USB issue was probably related to a bad soldering job to the 5V pad on the back of the Pi (my fault). As a result, power was not making it to the USB-A plug or the sound chi...
by RxBrad
Mon Jul 22, 2019 10:54 am
Forum: Show-off Corner (Game Boy Zero)
Topic: Blue & Grey GBZ - No Hot Glue - Digital Controls - LED fun
Replies: 8
Views: 555

Re: Blue & Grey GBZ - No Hot Glue - Digital Controls - LED fun

Hmm... It looks like you could actually wire two of them to the Pi, sharing the same pins, and get stereo output. See page 31 of the datasheet: https://datasheets.maximintegrated.com/en/ds/MAX98357A-MAX98357B.pdf (EDIT: It looks like you'd need to remove the indicated resistor from the breakout boar...
by RxBrad
Mon Jul 22, 2019 10:30 am
Forum: Show-off Corner (Game Boy Zero)
Topic: Blue & Grey GBZ - No Hot Glue - Digital Controls - LED fun
Replies: 8
Views: 555

Re: Blue & Grey GBZ - No Hot Glue - Digital Controls - LED fun

Nice!

I wish there was a stereo I2S amp with a small footprint like that mono one. I've been eyeing the 1334 I2S boards, but they appear to also need an amp. They make all-in-one stereo I2S boards, but they all seem too big and a bit too power-hungry for a Gameboy build.
by RxBrad
Sun Jul 14, 2019 6:59 pm
Forum: Show-off Corner (Game Boy Zero)
Topic: My New PCB Prototypes
Replies: 74
Views: 12838

Re: My New PCB Prototypes

EDIT: I managed to get my issues worked it. It seems that I possibly didn't have a good solder joint on the 5V pad on the back of the Pi (or I had damaged that pad during soldering). As a result, power was not making it to the USB-A plug and the sound chip. Ultimately, I was able to fix it by runni...
by RxBrad
Sat Jul 13, 2019 6:33 am
Forum: Show-off Corner (Game Boy Zero)
Topic: My New PCB Prototypes
Replies: 74
Views: 12838

Re: My New PCB Prototypes

EDIT: I managed to get my issues worked it. It seems that I possibly didn't have a good solder joint on the 5V pad on the back of the Pi (or I had damaged that pad during soldering). As a result, power was not making it to the USB-A plug and the sound chip. Ultimately, I was able to fix it by runni...
by RxBrad
Fri Jul 12, 2019 6:57 pm
Forum: Show-off Corner (Game Boy Zero)
Topic: My New PCB Prototypes
Replies: 74
Views: 12838

Re: My New PCB Prototypes

EDIT: I managed to get my issues worked it. It seems that I possibly didn't have a good solder joint on the 5V pad on the back of the Pi (or I had damaged that pad during soldering). As a result, power was not making it to the USB-A plug and the sound chip. Ultimately, I was able to fix it by runni...
by RxBrad
Fri Jul 12, 2019 7:49 am
Forum: General Chat (Game Boy Zero)
Topic: Button Suggestions for Mounting Inside Cartridge?
Replies: 12
Views: 1459

Re: Button Suggestions for Mounting Inside Cartridge?

More specifically, wouldn't it just be the LCD's backlight switching on and off at the PWM frequency? The higher the duty cycle, the longer it stays on. https://en.wikipedia.org/wiki/Pulse-width_modulation#Duty_cycle So, the backlight turns on 146 times per second, and the higher the brightness / du...
by RxBrad
Thu Jul 11, 2019 4:40 am
Forum: General Chat (Game Boy Zero)
Topic: Button Suggestions for Mounting Inside Cartridge?
Replies: 12
Views: 1459

Re: Button Suggestions for Mounting Inside Cartridge?

Heh.. someone asked me to record the PWM dimming in slow motion. It's kind of neat. A lot like when you tried recording old CRT televisions. https://i.imgur.com/ZIpzUxo.gifv Luckily, you don't notice the flickering in real life (at least I don't). Though it's at 146Hz, so there's a small possibility...
by RxBrad
Mon Jul 08, 2019 9:37 am
Forum: Show-off Corner (Game Boy Zero)
Topic: My New PCB Prototypes
Replies: 74
Views: 12838

Re: My New PCB Prototypes

EDIT: I managed to get my issues worked it. It seems that I possibly didn't have a good solder joint on the 5V pad on the back of the Pi (or I had damaged that pad during soldering). As a result, power was not making it to the USB-A plug and the sound chip. Ultimately, I was able to fix it by runni...