![]() ![]() Arduino has a 1A Regulator while it should be more than 2.2A if you want to use Big LCDs or TFTs. See what happened if you use Arduino Mega2560 R3 with a big display like TFT 7 inch:Ģ- Most Regulators in Arduino boards: 5V 1A.ģ- TFT 7 inch (My TFT 7 inch type SSD1963) use 450mA from the Arduino board Arduino uses a weak regulator of 5v 1A! and they recommend to use 9V power supply. I found my problem: The problem is on Arduino boards. But I do not know why it does not work with 3.3V on the pins! There is also a regulator in TFT board and it shows that board work with 5V. I am using my TFT more than 1 month and it is still safe. ![]() In SSD1963 catalog also mention that do not use more than 3.3V else TFT will damage. I tried using 10K resistors on the pins but display does not work well and shows noise and does not show anything else. Thank you for your reply and your information. The problem started when I started to use TFT 7 inch. I have tested other smaller board like TFT2.4" and I have no problem. I do not think my board have problem because if I disconnect the LCD every thing work well and nothing become heat on the board. I try external power supply 9V 1 Amp, 9V 4 Amp and the problem remain. ![]() On Diode near these capacitors also become heat. Also the Regulator on the Arduino board beacom very heat (burns your finger if you touch it). The problem is that once I have connected the board via USB to my laptop every thing work well, but once I use external power supply I have a noise in LCD and after a short time LCD do not show anything and there are some lines in the screen (NOISE) and arduino board restart approximately each 5 sec and the LED on board blinks (Shows that board restarted). I have connected the 40 pins to my Arduino board based on the attached image file.ġ- Am I connected the pins well? I think I have connected PIN RS wrong as it is "READ DATA CLOCK" and I have connected it to 3v3 positive power supply (See the picture).Ģ- I am using LCD, TOUCH and SD card in my project. I am using Arduino MEGA2560 and LCD 7 INCH. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |