Many of you are planning on using screens inside, or building a hood
But just in case there are some of you that are not aware of how screens work in sunlight:
A standard monitor or TV is not going to be viewable in daylight.
Brightness is measured in candela per square meter, c/m2 or also nits. c/m2=nits. Same thing.
- Daylight viewable means visible outside with no clouds, but no sun directly on the monitor.
- Sunlight viewable means the sun is shining directly on the screen
- Standard monitors and TVs range in brightness between about 250-400 nits.
- Daylight viewable is usually defined as 800-1000 nits.
- Sunlight viewable is usually defined as 1500+ nits.
So far, in the several other threads where people have been looking for inexpensive daylight/sunlight viewable screens, they have not been found. They seem to start at about the $1k mark, and go up steeply as the size goes up.
There are a few smaller screens (5-7") that can be found, but these are not usually suitably for use with a PC, unless the software
has been specifically written for small screens.
The odds of an inexpensive one coming out does not seem good to me. Think about it. What's the market? Systems built in cars have the screens aimed so the reflection is from the inside roof of the car, so they don't need to be as bright. There's just about a zero market for screens that can be viewed when the sun is shining directly on it. Not much of a market for screens that can be viewed outside on a sunny day. ATM or Kiosks? They can use a bright CRT. Much cheaper. Burns a lot of AC, but that's OK for an ATM.
The reason for the previous paragraph is just to say I'm not betting on the price
of 1500nit screens coming down in the near future. I think your decision is to either find a way to not use the screen
outside, put up with an inconvenient outside screen (hood, etc.) or, save all the money
you can by finding cheap PC, power supply, GPS, software, charts, etc., but bite the bullet and shell out the change for the monitor. In my experience, everything can be found very cheap, except the screen.