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DIY 10" sunlight readable plotter
#12
Hi all,

currently i am working on the schematic. A lot of work, a lot of new technologies.
How does HDMI work internally? How to drive TFT panels?

I try to get everything done with cheap chinese components. Except special parts like
HDMI video decoder, driver and switches.

The plotter will have some buttons additional to the touch screen. I think OpenCPN
is unusable without keyboard and mouse so I added a keypad:

[Image: acb4fc106b_album.jpg]

There are some buttons going to GPIO pins of the pi and some buttons going to the
electronic directly. There will be a 8pin PIC microcontroller providing the pwm frequency
for the LCD backlight and switching the HDMI source.

I am almost finished with the schematic. The plotter will have a 7 port USB hub integrated,
a 2 to 1 HDMI switch, a RTC, battery backup and charger, IR receiver for remote and so on.

The housing will be made of pvc foam. I got 24 mm pvc foam, called "Forex". The front
and back have printing quality. This is the main usage of this kind of foam. The borders are
covered with melamine. Basically this is the same you are using for tables. It makes a very
hard and nice surface and it is very cheap.

The front will be milled to get a pocket for LCD and touch. The back will be milled to get
a pocket for the electronic. A sticky film and 0.8 mm anti glare coversheet will close the
plotter on the front. On the backside M4 brass nuts will be pressed in to hold a aluminium
cover plate in place.

Two of the seven USB ports are kept internally. Five of them are usable to connect
mouse/keyboard, wifi, bluetooth or memory devices. But all of them are kept within the
housing. The Aluminium plate will cover them to get everything waterproof.

The pcb will not contain boat related interfaces or sensosr except one NMEA 0183. There
is one connector with access to GPIOs, I2C, USB and so one and a dedicated space for
an additional pcb.

It will be possible to connect another pcb to the system that contains GPS, sensors,
or I/O. So ideas regarding this pcb are welcome. AIS? GPS, NMEA2k?

Best wishes,
Chris
Reply


Messages In This Thread
DIY 10" sunlight readable plotter - by BellaX - 2018-10-22, 10:42 PM
RE: DIY 10" sunlight readable plotter - by BellaX - 2018-10-23, 08:22 PM
RE: DIY 10" sunlight readable plotter - by BellaX - 2018-10-23, 10:32 PM
RE: DIY 10" sunlight readable plotter - by BellaX - 2018-10-25, 10:04 AM
RE: DIY 10" sunlight readable plotter - by BellaX - 2018-10-31, 09:10 PM
RE: DIY 10" sunlight readable plotter - by BellaX - 2018-12-14, 04:36 PM
RE: DIY 10" sunlight readable plotter - by BellaX - 2019-01-20, 11:45 PM
RE: DIY 10" sunlight readable plotter - by BellaX - 2019-02-06, 06:54 PM
DIY 10" sunlight readable plotter - by svtgd - 2019-03-09, 12:35 AM
RE: DIY 10" sunlight readable plotter - by BellaX - 2019-03-09, 03:56 PM
DIY 10" sunlight readable plotter - by svtgd - 2019-03-09, 04:14 PM
RE: DIY 10" sunlight readable plotter - by BellaX - 2019-04-03, 04:59 PM
RE: DIY 10" sunlight readable plotter - by BellaX - 2019-05-20, 02:10 PM
RE: DIY 10" sunlight readable plotter - by CianH - 2019-05-20, 02:29 PM
RE: DIY 10" sunlight readable plotter - by BellaX - 2019-05-20, 03:51 PM
RE: DIY 10" sunlight readable plotter - by BellaX - 2019-08-09, 09:28 AM
RE: DIY 10" sunlight readable plotter - by BellaX - 2021-08-03, 11:07 AM

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