Build Instructions

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• 1

  Programming and Running I2C Programs

  Using the jtap updi programming pin, and using the Nano as the programmer, we upload display programs to the ATtiny1604 microcontroller that controls the seven data lines, each with five rbg leds in series. When using the Nano to control the display unit with the I2C lines, we must remember to use 10k pull-up resistors on the SDA an SCL signal lines. But the onboard ATtiny1604 is capable by itself, to be master of many slaves.

  Below is a test program for four rgb 5x7 led display modules on the I2C bus:
• 2

  Typical Application 1

  Here is a schematic of a typical application using the display modules with a USB to TTL converter for communication with the computer on any type of terminal emulation program for control of the rgb 5x7 matrix display modules.  If these are too small to see, hit the 'view gallery', at the top left under the pictures.

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