Sunlight Readable Display

[Hillzzz]

Hi Hillzzz,
I googled "Digiwave HA-101ZIEBCAD1-V 10.1"  and couldn't find it.  Where did you buy it?
Jodel

Hi Jodel you can find it here https://www.soselectronic.com/en/product...1-v-378585

Hi Hillzzz,

Did you ever find an answer to the dimmer issue? I've just ordered the screen and would love to set up external dimmer control.

Thanks,
Fraser

Hi Fraser, If it's an external dimmer you want like a potentiometer knob style dimmer then all you need is a simple circuit that goes from zero to 3 volts with a potentiometer to control the voltage. If you look at the PDF circuit specs you will see the connector which controls brightness. I want to do it in software and i haven't found a solution yet. Cheers, H.

Hi Hillzzz, 

I was looking at software control too. I came across two issues - the one that you mentioned with the brightness going to zero after quitting the app, and another where there was terrible flicker at lower brightness levels. I resolved the flicker issue using PIGPIO, as it uses hardware PWM timing. It should also resolve your issue as there is a daemon that runs, so the setting should stay on until the power is off. I've implemented a service to listen for the GUI app and change the PWM duty cycle. I've just got a very basic Python tkinter slider to change the brightness. The service starts on boot using systemd.

I'm essentially building a self-contained plotter for use in the open cockpit, so far this screen is looking great.

Thanks,
Fraser

HI Fraser,

Thats really interesting. I stopped looking at the software side for a bit because I am currently designing a 3D printed box to put the screen and Pi in that will be attached to the helm station. I looked at Navipods and similar and could not understand why a plastic box cost more than the screen and Pi together. I will shortly get ack to the software side so thanks very much for your pointers. very helpful.

Thanks, Hillzzz,