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Take the SDA wire and insert into the left column 2
nd
pin down (GPIO 2 Serial Data I2C in the
diagram).
Take the SCL wire and insert into the left column 3
rd
pin down (GPIO 3 Serial Clock I2C in the
diagram).
Take the VCC wire and insert into the left column 1
st
pin down (3.3v in the diagram).
Take the GND wire and insert into the right column 7
th
pin down (Ground in the diagram).
Note that the OLED uses 3.3v supply from the pi board whereas the fan uses the 5v. Make
sure you are aware of this!!
Type 2:
Look at the back of the OLED as above, the pins are (from left to right in order):
1. SDA (seral data)
2. SCL (serial clock)
3. GND (ground)
4. VCC (3.3v)
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