I2C µBackpack for 8x2 character LCDs
installed on an 8x2 LCD
What is an I2C backpack?
An I2C backpack basically adapts the extensive parallel bus character displays use to the popular 2-wire I2C bus. This saves on a lot of wiring and precious IO pins on your microcontroller. And as a bonus, you can even share these 2 wires between 127 more accessories!!!
Of course, nothing comes without a catch; using an I2C backpack will make the refresh rate of your display a little slower.
When it comes to the small 8x2 display, you can no longer use the extremely common I2C backpack with all its pins. in one row. I copied the entire schematic of it and just arranged the display header for the 8x2 LCD.
An I2C backpack basically adapts the extensive parallel bus character displays use to the popular 2-wire I2C bus. This saves on a lot of wiring and precious IO pins on your microcontroller. And as a bonus, you can even share these 2 wires between 127 more accessories!!!
Of course, nothing comes without a catch; using an I2C backpack will make the refresh rate of your display a little slower.
When it comes to the small 8x2 display, you can no longer use the extremely common I2C backpack with all its pins. in one row. I copied the entire schematic of it and just arranged the display header for the 8x2 LCD.
installed on an 8x2 LCD
Compatibility
While I designed this backpack for use with 8x2 displays, it will also work with any display which has this
kind of 2 row connector. (shown is a really nice vacuum fluorescent display which happens to have a compatible pinout) Note: the mounting holes
probably wont align on different displays than is the common 8x2.
While I designed this backpack for use with 8x2 displays, it will also work with any display which has this
kind of 2 row connector. (shown is a really nice vacuum fluorescent display which happens to have a compatible pinout) Note: the mounting holes
probably wont align on different displays than is the common 8x2.
Revision B
In this revision I fixed the IC footprint (on the first rev. I choose too narrow package for the IC meaning i had to bend its legs under the body)
and added the "standard" Qwiic/stemma/uSup connector for simple use.
TLDR:
-Added QW/ST connector
-Fixed IC footprint
In this revision I fixed the IC footprint (on the first rev. I choose too narrow package for the IC meaning i had to bend its legs under the body)
and added the "standard" Qwiic/stemma/uSup connector for simple use. TLDR:
-Added QW/ST connector
-Fixed IC footprint
