Wiring
The following components are required to wire a 74HC4067 breakout board:
- A 74HC4067 breakout board.
- Buttons or switches.
Important
MobiFlight only supports connecting buttons to multiplexers. Encoders must be connected directly to a board.
The +5V power can come directly from the connected board. The 10kΩ resistor between DATA and +5V is optional, however it can help if there are issues with button presses being detected correctly.
When using the chip directly without a breakout board, ensure the EN pin is connected to GND through a 10kΩ resistor.
Tip
When connecting additional multiplexers to the same board, they can share the S0–S3 pins. Each multiplexer must use a dedicated Data pin.