So both of them are with an ST7735 Chipset because i get on both a picture. The second one with header pins only for the display i need to connect a logic converter to get a nice picture.
But how to use the SD Card? I have soldered the 16Pin Header on the other side as the yellow pin headers (and only wired here the Arduino) but i got no information from the SD Card. Did someone manage to get it working? Did you need for the SD Card also the logic level converter (the MOSI /SDA and CLK / SCLK are shared).
hi
now i have tried this: http://i.imgur.com/nLnwFC0.jpg
but it also didn't work. Does nobody use this TFT? They sell it on Banggood like hell but only a few people did get it to work.
If there is somebody who has done this pls be so helpful and explain how.
hape
hi @David: big thx to you. Without your hint that the resistors are to big i had never solved this problem. But for others who read this the solution is unbelievable. For the TFT its described that you have to use the 1kO resistors for the wires. So also its clear you have to share the Clock and MOSI lines between the TFT and the SD Card. So i startet after the nice explanation from David and test all the resistors between which line they are. And i found that the resistors named 103 on it and R3, R4 and R5 beside are the lines from the SDCard field named CLK, MOSI and CS. So i only soldered the resistors out and uses the 1kO from the Arduino to the TFT and it works perfectly.
So the only question is: Who is such an idiot to design this PCB? I think not many people tried so hard to find out whats going wrong (i tried almost for 3 whole days to figure this out).
So if you have a 1.8" TFT with the yellow pins for the TFT on the one side and NC, NC, CD, MOSI, MISO, CLK (last 4 are SDCard), CS, SCK, SDA, RS, RST (last 5 are TFT), NC, BL, NC, VCC, GND (from pin 16 to pin 1) solder 4 more pins in the SDCard holes and solder the R3, R4 and R5 resistors out.
Then connect like this http://labs.domipheus.com/blog/wp-content/uploads/2014/06/1_8_TFT.png and connect yellow pin 4 DIN to SDCard MOSI and yellow pin 5 CLK to SDCard CLK. Now SDCard MISO has to go to pin 12 in Arduino UNO (without resistor) and SDCard CS where ever you plan the cable select (with a 1kO resistor) (in the SDCard info sample sketch its D4 on Arduino).
After this the TFT works perfectly and also the SD Card. This is imho a easy to make solution and you have to do something on this PCB if you want to work with the SD Card.
So my hope is that a few people now read this and bring the SD Card to work.
thx a lot for this forum to help others finding tricky solutions
and a special thx to David
hape
