LED display via MCP23017
Tonyf49 2022-04-20 16:17:52 1407 Views1 Replies Hi
I have a 16x16 led display connected to my Arduino Uno via a MCP23017-based IO expansion board and a DFRobot Gravity: I2C Multiplexer.
My sketch displays an image perfectly (all leds lit constantly) when the LED unit is attached to Arduino Uno pins directly.
However, when I move the connection to the MCP23017, the image leds turn on and off repeatedly.
Any suggestions?
Regards
2022-04-22 00:45:36 
R2D2C3PO
Please provide extra power to the display. As the MCP23017 maxium current may be not enough to power it.
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