Question about the exposed pins on I2C RGB Backlight LCD 16x2 Display Module for Arduino
rvt 2023-09-06 21:26:41 1226 Views3 Replies I'm reading the tutorial here: https://wiki.dfrobot.com/_SKU_DFR0374__SKU_DFR0936_LCD_Keypad_Shield_V2.0
I have question about the exposed pins on this shield.
For example, in the Board Overview section, what does “D6 + -” mean.
I assume D6 is for pin D6 on the arduino. What is the “+” and “-” pins. My guess is that is power / ground?
Inspect the silkscreen/pin-labels on your physical shield — see whether “+” and “–” are near the 5 V and GND of the pin-header.
Use a multimeter (with the shield plugged on Arduino but no other load) to check continuity between “+” and the Arduino 5 V pin, and between “–” and Arduino GND.
Check the underside PCB / schematic if available (the wiki sometimes links a “Pin layout / schematic” PDF) to see what those pins map to.
ahsrab.rifat Do we know what happened to D2, D3, D4, D7, D8 ,D9, D12 AND D13?
Do we just lose those?
Bevan.Johnson I tested this out and the “+” and “-” do appear to represent power and ground respectively.
rvt 
