Openplotter in an Oldplotter! - Printable Version +- OpenMarine (https://forum.openmarine.net) +-- Forum: OpenPlotter (https://forum.openmarine.net/forumdisplay.php?fid=1) +--- Forum: How I did it (https://forum.openmarine.net/forumdisplay.php?fid=6) +--- Thread: Openplotter in an Oldplotter! (/showthread.php?tid=919) |
Openplotter in an Oldplotter! - manitu - 2018-01-02 Hello good people. I've been offline and onshore for a while, working, but now I'm slowly getting the spare time to do boat things. I see that openplotter has evolved a lot since last time I was around. Big cheer for the developers, not resting on past achievements! A thing that hasn't changed is the availability of small bright waterproof screens... So here is my take on the problem:Use an old chartplotter which no longer works. There should be plenty lying around. I'm using a 20 year old Geonav 11 flash. The front glass is broken , but it is easily replaced , and I need to decide on touch or not first. Mine uses a sharp LQ10D368 panel wich I think need a ttl control card. I haven't found one with hdmi input yet. What I have found is a direct replacement screen with brighter LED's, better resolution (800x600 vs 480x360) and HDMI input: https://www.ebay.ca/itm/HDMI-VGA-DVI-LCD-Control-Board-10-4-800x600-LED-Backlight-Replace-G104SN03-V1/201123889099?hash=item2ed3eaffcb:g:IaIAAOSw-K9ZI6Vu It's only 90 bucks so its a no-brainer , really. I'm planning a basic setup at first ,Rpi2, GPS and IMU, and I'll try to use the buttons and joystick on the chartplotter. This is just a first mock-up, cables will be shortened and components mounted better. .manitu RE: Openplotter in an Oldplotter! - manitu - 2018-01-10 Hi again. Now I got the compass installed. Also got the buttons on the keypad working. Not my best looking soldering , but it works. The joystick and EBL/VRM button I still haven't figured out. I would love to get the joystick working , but It seems like It outputs are: up-left, up-right, down-right down-left. Those direction has a corresponding pin wich is earthed when pushed. When you push it straight up , you get about 200 ohms to earth on both up-left and up-right. other directions works the same. Any and all ideas welcome. .manitu RE: Openplotter in an Oldplotter! - Vamonos - 2018-01-11 (2018-01-10, 01:38 AM)manitu Wrote: I would love to get the joystick working , but It seems like It outputs are: up-left, up-right, down-right down-left. Those direction has a corresponding pin wich is earthed when pushed. When you push it straight up , you get about 200 ohms to earth on both up-left and up-right. other directions works the same.Regarding the joystick. Perhaps I'm not thinking correctly, but it seems that one quad nor gate on a piece of perf-board could solve your problem. With the up-left tied to one input and the up-right tied to the other, you would get a high out of the nor gate that signifies up. Likewise, you would wire up the other three combinations and end up with up, down, left and right outputs. Something like a 74LS02 (if you hare running 5 volts should do the trick). Richard |