Good to know that Zero can run at 3V or even directly from the VBAT. OTG and HDMI won't work without 5V but I removed the connectors anyway. I am still using the Boost as to have the kill switch.moosepr wrote:You don't technically need the power boost! You can actually run the pi as low as 3v (I have read it will even run as low as 2.7v) so in my projects I have been powering the pi straight from the li-po battery! The only thing you need to be sure of, is that the battery is protected so it doesn't become over discharged. Some battery's have a tiny pcb attached to them which allow this.
Dreamcast VMU Pi [Completed]
Re: Dreamcast VMU Pi
Re: Dreamcast VMU Pi
Wow... a lot of 1.44 inch LCD screen out there. You've already found out that backlight LED can be driven by 3.3V supply with a series current limiter R = (3.3-Vf)/If ~= 22Ω at least for Nokia 5110 LCD copy. Then we can get rid of all boosters. Very good idea.moosepr wrote:best i have found is 128*160
https://www.aliexpress.com/item/1-44-in ... 84209.html
but that will probably just be a little taller to make space for the extra 32 pixel rows
Re: Dreamcast VMU Pi
Yep!obsidianspider wrote:I managed to find your test video on YouTube last night at around 2 AM, so of course now I am attempting this as well. Thanks to @moosepr for directing me to this thread from my post over at the RetroPie forum.
Which OLED are you using? Is it the 1431? https://www.adafruit.com/products/1431
Re: Dreamcast VMU Pi
I've got extra VMUs last week. Some of them are missing the cap. Is this something we can easily design in 3D printer ?
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- moosepr
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Re: Dreamcast VMU Pi
That's a whole lot of vmu's!
Are you going into production?
Are you going into production?
Get a small cheep LCD in your project https://www.sudomod.com/forum/viewtopic.php?f=22&t=2312
Wrap it all round a battery https://www.sudomod.com/forum/viewtopic.php?f=13&t=2292
Or use a custom PCB to make it really small https://www.sudomod.com/forum/viewtopic.php?f=13&t=2512
or make it really really really really tiny!! https://www.sudomod.com/forum/viewtopic.php?f=13&t=2919
Wrap it all round a battery https://www.sudomod.com/forum/viewtopic.php?f=13&t=2292
Or use a custom PCB to make it really small https://www.sudomod.com/forum/viewtopic.php?f=13&t=2512
or make it really really really really tiny!! https://www.sudomod.com/forum/viewtopic.php?f=13&t=2919
- RetroRocket
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Re: Dreamcast VMU Pi
Depending on the wall thickness, I shouldn't think it would be difficult. I'm a bit overwhelmed with work atm, but could take a crack at it in a couple weeks. I'll keep an eye out for an original cap and can probably duplicate it reasonably quickly. Or would you want to modify it for extra space?
Re: Dreamcast VMU Pi
Hehe. I start to collect all the variants of the VMUs but found red/black/godzilla versions are way too pricy. This should be good enough to play with casing and give pi-powered-vmu to friends eventually.
Re: Dreamcast VMU Pi
That would be very nice if you can help duping the cap! The thickness is 1.50mm. Actually I need to remove the internal rib otherwise SD won't fit in the case.RetroRocket wrote: ↑Sat Apr 15, 2017 3:06 pmDepending on the wall thickness, I shouldn't think it would be difficult. I'm a bit overwhelmed with work atm, but could take a crack at it in a couple weeks. I'll keep an eye out for an original cap and can probably duplicate it reasonably quickly. Or would you want to modify it for extra space?
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Re: Dreamcast VMU Pi
My VMU regains the audio thanks to moosepr and obsidianspider in the thread https://retropie.org.uk/forum/topic/917 ... ild-wip/33
# Edit /boot/config.txt
# Boost up the volume
https://youtu.be/vX30hkX5Ims
# Edit /boot/config.txt
Code: Select all
dtoverlay=pwm,pin=18,func=2
Code: Select all
$ amixer cset numid=1 -- 100%
numid=1,iface=MIXER,name='PCM Playback Volume'
; type=INTEGER,access=rw---R--,values=1,min=-10239,max=400,step=0
: values=400
| dBscale-min=-102.39dB,step=0.01dB,mute=1
- moosepr
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Re: Dreamcast VMU Pi
Glad to be of assistance!
The sound isn't really loud, but it's enough to add to the fun
The sound isn't really loud, but it's enough to add to the fun
Get a small cheep LCD in your project https://www.sudomod.com/forum/viewtopic.php?f=22&t=2312
Wrap it all round a battery https://www.sudomod.com/forum/viewtopic.php?f=13&t=2292
Or use a custom PCB to make it really small https://www.sudomod.com/forum/viewtopic.php?f=13&t=2512
or make it really really really really tiny!! https://www.sudomod.com/forum/viewtopic.php?f=13&t=2919
Wrap it all round a battery https://www.sudomod.com/forum/viewtopic.php?f=13&t=2292
Or use a custom PCB to make it really small https://www.sudomod.com/forum/viewtopic.php?f=13&t=2512
or make it really really really really tiny!! https://www.sudomod.com/forum/viewtopic.php?f=13&t=2919
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