Search found 278 matches

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: 4925

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: 4925

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: 81
Views: 64875

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: 81
Views: 64875

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: 81
Views: 64875

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: 8138

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: 8138

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: 81
Views: 64875

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 05, 2019 2:50 pm
Forum: General Chat (Game Boy Zero)
Topic: Button Suggestions for Mounting Inside Cartridge?
Replies: 12
Views: 8138

Re: Button Suggestions for Mounting Inside Cartridge?

I finally got my ATTINY13A dimmer working. It was a definite learning experience. I kept having to find creative ways to shrink the code to fit the 1KB memory on the chip. I also learned about things like decoupling capacitors and that math when coding in C is weird. https://youtu.be/p1sUsCvlENE The...
by RxBrad
Mon Jun 24, 2019 7:19 am
Forum: General Chat (Game Boy Zero)
Topic: RASPBERRY Pi 4 (lets get that 4GB ram )
Replies: 14
Views: 12901

Re: RASPBERRY Pi 4 (lets get that 4GB ram )

Hopefully we get an upgraded Zero sometime in the not-too-distant future. I feel like RetroPie & the emulators are developing further and further away from what the current Zero can handle. RetroPie 4.4 on a Pi Zero W really struggles with certain lr-snes9x2002 games (Dracula X, Chronotrigger, FF6, ...