On mine there seems to be a huge voltage drop, tested a 5V 2A phone charger, connected to the arduino - providing 6.12V When plugging in the LCD, drop to 4.5V, which isn't enough for the characters. Currently having a problem with just random symbols appearing on the display.by F1p - ByPic
jimeer Wrote: ------------------------------------------------------- > Thanks for the detailed explanation. > > A couple of things spring to mind: > 1) We can safely say that the I2C communication is > okay otherwise the BL would not change like it > does so we need to concentrate on the LCD itself. > 2) It looks a bit dim but could be just the video, > howeverby F1p - Serial & I2C Devices
More information to help with the problem: Arduino Version: 1.0.1 (Stable) Code: I2C library as above. Hardware supplied: PO18 I2C Chip + Holder - Orientation correct 100kOhm resistor (measured at 97.6k) Contrast Pot (0 to 840ohm) - set in the middle SCL/GND/SDA/5 Pin header EGO 1602RGB LCD + 18 way pin header Pin 1 on the ByVac PCB Driver connected to Pin 1 on the LCD, and 18 toby F1p - Serial & I2C Devices
Hi Jim, Thanks very much for this, greatly appreciated. I got this as an xmas pressy from your eBay shop... The Screen is still absolutely blank though!! The backlight is changing colour as expected. Any possible suggestions for the problem?? Regards, Philipby F1p - Serial & I2C Devices
So i got the RGB LED's working, with the following: #include "Wire.h" void setup() { Wire.begin(); Wire.beginTransmission(0x38); Wire.write(1); Wire.write(0); //Red Wire.write(10); //Green Wire.write(0); //Blue Wire.endTransmission(); } Although no luck with any text/cursor etc on the screen with a similar code: #include "Wire.by F1p - Serial & I2C Devices
Is there any arduino library or example code for the I2C P018 LCD chip and RGB 16x2 LCD?by F1p - Serial & I2C Devices