Search found 275 matches

by RxBrad
Sat Jul 13, 2019 6:33 am
Forum: Show-off Corner (Game Boy Zero)
Topic: My New PCB Prototypes
Replies: 81
Views: 19857

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: 19857

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: 2109

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: 2109

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: 19857

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: 2109

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: 3640

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, ...
by RxBrad
Mon Jun 17, 2019 12:01 pm
Forum: General Chat (Game Boy Zero)
Topic: Button Suggestions for Mounting Inside Cartridge?
Replies: 12
Views: 2109

Re: Button Suggestions for Mounting Inside Cartridge?

I did just notice a bug in the Mintybatterymonitor script that would cause pngview to constantly keep reloading the battery icon when it didn't need to. Line 31 of MintyBatteryMonitor.py: iconsState = percent should be: iconState = percent Can't test it at the moment, but it might help some of the s...
by RxBrad
Sun Jun 16, 2019 1:46 pm
Forum: General Chat (Game Boy Zero)
Topic: Button Suggestions for Mounting Inside Cartridge?
Replies: 12
Views: 2109

Re: Button Suggestions for Mounting Inside Cartridge?

I will note that using the Pi-based solution for dimming the screen on a Gearbest composite LCD resulted in some really significant slowdown in game emulation. Also, there's a fair amount of ground-loop noise when dimming the screen that way. A lot of games are downright unplayable when the PIGPIOD ...
by RxBrad
Fri Jun 14, 2019 3:14 pm
Forum: General Chat (Game Boy Zero)
Topic: Button Suggestions for Mounting Inside Cartridge?
Replies: 12
Views: 2109

Re: Button Suggestions for Mounting Inside Cartridge?

FYI.. That rocker switch worked pretty well. I ended up using one of the hatted tact switches on top of the shell for the hotkey.
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