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desiredshoe
Screen flash during power...

Forum: Codigos
Last Post:  desiredshoe
11-12-2018, 06:23 42
» Replies: 5
» Views: 51
puddletown
Touch screen not working?...

Forum: Pantallas FT810, FT811 y FT813
Last Post:  puddletown
05-12-2018, 17:32 42
» Replies: 0
» Views: 15
lorcap
Bitmap corruption when sw...

Forum: Codigos
Last Post:  lorcap
29-11-2018, 13:40 55
» Replies: 2
» Views: 40
lorcap
Power Hungry FT81x

Forum: Codigos
Last Post:  lorcap
22-11-2018, 11:36 51
» Replies: 1
» Views: 87
TFTLCDCyg
NHD 7" en nucleo STM32 F7...

Forum: Library GD23ZU
Last Post:  TFTLCDCyg
21-11-2018, 01:41 53
» Replies: 1
» Views: 51

 
  FT811 Degree ° symbol
Posted by:  raufjay - 07-03-2018, 08:02 45 - Forum: Codigos - Replies (3)

Hello again,

Is there any possibility to print Degree ' ° ' symbol on FT811 display?  Its ascii value is 248. Or shall I have to play with DOT command.

Thanks,

Rauf

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  Power Hungry FT81x
Posted by:  raufjay - 07-03-2018, 07:23 35 - Forum: Codigos - Replies (1)

Hello,

I am trying to use a 1000mA lipo battery with my stm32 with Hotmcu FT811CB 5" display. It is taking around 450mA for normal operation. I am still investigating further into my projects different segments to see which part is eating how much power.
But i am sure the main power hungry would be FT811 based 5" TFT with capacitive Touch.
Have any one implemented any power saving algorithm for these displays?
Any help will be highly appreciated.

Thanks,

Rauf

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  Pantallas EVE2 de Newhaven display
Posted by:  TFTLCDCyg - 05-03-2018, 08:52 37 - Forum: Pantallas FT810, FT811 y FT813 - Replies (1)

Hace un par de meses el fabricante Newhaven display presentó al mercado varias pantallas basadas en los chips FT81X. Las versiones tienen varios tamaños: 3.5", 4.3", 5" y 7"

http://www.eve2tftmodules.newhavendisplay.com/shop.php

Los controladores son FT812 para las versiones con panel táctil resistivo y FT813 para las versiones con panel táctil capacitivo.

Además podemos acceder a pantallas con tres niveles diferentes de intensidad de la retroiluminación: estándar, premium y visible bajo condiciones de luz solar.

La principal característica de diseño es que todas las versiones cuentan con dos modos de conexión: mediante un cable plano de 20 hilos con pitch de 1 mm o bien mediante un cabezal de pines con espaciamiento estándar (2.54 mm); la segunda opción me parece la más versátil y permite contar con lineas de unión cortas, además de conseguir ensambles compactos.

?mage

Funcionan con 3.3V.

He podido hacerme con algunos TFT basados en el chip FT813: 3.5", 4.3 y 5" y funcionan muy bien con la librería para gameduino 2/3 en micros como Arduino Due, Core7XXI, F429-Disco, M4-DEMO (F407 black) y teensy 3.6
?mage

?mage

?mage
FT813 3.5" 320x240 + F429-DISCO

?mage
FT813 4.3", 480x272 +teensy 3.6
?mage
FT813 5", 800x480 +teensy 3.6

Son una buena opción para el diseño de proyectos con FT8XX basados en la librería que nos ocupa.

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  Need help for Audio amplification from FT811
Posted by:  raufjay - 02-03-2018, 15:44 44 - Forum: Codigos - Replies (3)

[attachment=82][attachment=82][attachment=82]Hello,
I need some help for Audio amplification from FT811 audio output.

Please see attached schematic. This is how I tried to amplify the audio from FT811. FT811 sends out audio in pwm shapes. 
The amplification is done alright, but I always hear a humming sound out from speaker. I am using 8ohm half watt speaker for it. 

Can you please advise me some good scheme so I can control that humming sound.

Thanks,

Rauf



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  [SOLVED] Reset Power up issue with HOTMMCU FT811CB
Posted by:  raufjay - 27-02-2018, 02:05 55 - Forum: Codigos - Replies (7)

I got 4x FT811CB,  5" with capacitive touch from the HOTMCU.

The screen is working ok. But there is a problem.
When we reset or re-power, screen is just blank, then we have to touch or move a little the wires on the screen. Then screen starts up.

We tried many many times, with shortest wires of just 7cm. We tried with the FTC connector/wire which came alongwith the LCD, we tried with 10pin IDC cable/connector, we tried with single/one by one cable with the same result. 

We tried with many different controller boards, with different reset schemes.

Please do let us know how to overcome this issue.

Does any of you have any such issue? or can suggest me what are we doing wrong.
I have total 5 screens, 4x FT811CB and one is FT800CB 4.3". The 4.3" with FT800 is working fine and does not have this problem. But all 4 FT811CB 5" has the same issue.

Thanks,

Rauf

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