I realise it might sound as if I don't have to much experience because, we'll I don't. I have however done extensive reaserch on both the bike and laws. In the post I didn't quite give all the information and only a general summary about my project so I am aware and know what more I need for it to work. But thank you for pointing out some issues.There's a little problem with sunlight too.
There are more issues than that if the bike is going to be street legal and if this is to replace the stock instrument cluster.
And while epaper sounds like an option, it might not refresh fast enough and will require some additional illumination for use after dark.
OP mentions a speedometer. That needs more than just a hall sensor somewehre on the bike as the calculated speed depends on where the sensor is, what it monitors, and various gear ratios. it will also have to comply with local laws and regulations.
If the sensor is on the input side of the gear box their device will need to know which gear the bike is in and the final drive ratio for that gear inorder to calculate speed from RPM. It also won't be accurate when the clutch is out or when coasting in neutral.
On the output side, you'd only need to know the ratios in the final drive (one revolution = how many at the back wheel).
In both cases, you'll need to know the rolling radius of the backwheel and tyre too.
Based on their OP I'm not at all sure they have the necessary skills, experience, and knowledge to roll their own speedo and have it meet local requirements for accuracy etc.
Back to the display question, for just a speedo I'd forget using a screen and opt for 3 x 7 segment LED displays*. Much easier to drive and to find ones that are daylight readable. Probably cheaper too.
*: two if the bike cannot reach 100mph/kph
Statistics: Posted by HannesW — Tue Sep 17, 2024 6:36 am