Question about the exposed pins on I2C RGB Backlight LCD 16x2 Display Module for Arduino
rvt 2023-09-06 21:26:41 1638 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 Sorry for the late response. "D6" refers to pin D6 on the Arduino board, which is a digital input/output pin. "+/-" represents the power pins on the module. Typically, the "+/-" pins are used to connect the power and ground (GND).
JaneYu I tested this out and the “+” and “-” do appear to represent power and ground respectively.
rvt 
