Screens

[kogumelow]

Does those screens run on 7,4V? Whats the minimum voltage they run off, since the batteries lose some voltage as they get discharged?
http://www.aliexpress.com/store/product ... 43048.html
http://www.aliexpress.com/store/product ... 61376.html

 

[hailrazer]

Well the first one says Min 9v.

The second doesn't say but the board drawing shows a regulator on it. You can see a regulator on both of the pics for both of them.

A lot of times the power goes to a linear regulator that can be bypassed. But what regulator? You have to determine that. Also is the regulator for the whole board or just certain parts , that needs to be determined.

The first one may go to a 8v regulator hence a minimum of 9v. The second might got to a 5v reg or a 8v. Who knows till you get it and try it ?

 

[zeldaxpro]

Does those screens run on 7,4V? Whats the minimum voltage they run off, since the batteries lose some voltage as they get discharged?
http://www.aliexpress.com/store/product ... 43048.html
http://www.aliexpress.com/store/product ... 61376.html

Unfortunately these Dalian "Good Display" (from both links) take a minimum of 9v to run. The GD567M03 controller board is the newer revision, which takes 9v. The older revisions could run as low as 5v, but I doubt they have them anymore. I personally had a newer one and tested it with 7.4v, not working. So I sold it, found an old one, and works fine on 7.4v. If you plan on using 7.4v batteries, then do not get this screen. You could use a step up regulator to up the 7.4v to 9v for the screen, but those can be inefficient.

 

[hailrazer]

But did you bypass the onboard regulator ?

 

[kogumelow]

Does anyone got an idea where to find the old ones? I don't want to use 3 batteries on my portable, I would be wasting energy putting more voltage on the 7.4 line on 64 (right?)