pcjohn
Well-known member
- Joined
- Apr 4, 2007
- Messages
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Just got the prototype running today. I came up with this for
my own use, but I thought I'd share:
It's a PI-HAT type of design, flip the PI upside down and plug it
into the board. As you see by the pictures, it's pretty damned
small but look what it does:
VGA666 integrated, so it will run on a standard RGB monitor.
Built in joystick controller. 36 digital inputs plus 4 analog inputs
for potentiometers.
Built in Class-D audio amplifier. I need to experiment with this -
it's nice but may not be loud enough for my purposes.
Sadly the GPIO pins don't transfer USB or audio so separate cables
are needed. Most of the GPIO pins are used in the VGA666 and this
was faster than bit banging the data down a couple of the remaining
pins.
You can tell by the jumpers I made a couple mistakes. I'm also thinking of
adding a 5 volt regulator so the thing will run off 12 volts only. Arcade power
supplies are so not-5-volts and I'm not sure what the limits are on the Pi.
Anyway, more to come down the road.
JRD
my own use, but I thought I'd share:
It's a PI-HAT type of design, flip the PI upside down and plug it
into the board. As you see by the pictures, it's pretty damned
small but look what it does:
VGA666 integrated, so it will run on a standard RGB monitor.
Built in joystick controller. 36 digital inputs plus 4 analog inputs
for potentiometers.
Built in Class-D audio amplifier. I need to experiment with this -
it's nice but may not be loud enough for my purposes.
Sadly the GPIO pins don't transfer USB or audio so separate cables
are needed. Most of the GPIO pins are used in the VGA666 and this
was faster than bit banging the data down a couple of the remaining
pins.
You can tell by the jumpers I made a couple mistakes. I'm also thinking of
adding a 5 volt regulator so the thing will run off 12 volts only. Arcade power
supplies are so not-5-volts and I'm not sure what the limits are on the Pi.
Anyway, more to come down the road.
JRD



