Control wires and data wires. 4 pin relay wiring diagram. I've been trying to wire the lcd to the board and have it display the hello world message.
Before wiring the lcd screen to your arduino uno or genuino board we suggest to solder a pin header strip to the 14 (or 16) pin count connector of the lcd screen.
4 pin fan connections *cable coloring varies from fan to fan. Pin5 or rw (read/write) to ground (puts lcd in read mode eases the communication for user). I have a lcd with a gnd, vcc, sda and scl. 13.3inch hdmi lcd (h) (with case) v2.
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