The MobiFlight Multiplexer Breakout Board is a breakout board for easier use of the 74HC4067 multiplexer. It is designed to work best together with the MobiFlight Prototyping Board.
On the top side, The board uses XH JST connectors for the individual inputs. On the back, you can add up to two 74HC4067 modules (https://shop.mobiflight.com/product/multiplexer).
On the bottom side, you plug in the 74HC4067 modules. Version 1.2 now shows information about the orientation and all important pins are labeled. You can daisy chain the boards.
For more information on how to configure the board with MobiFlight, check out the MobiFlight Connector documentation.
Connection coming from your Mobiflight board, or another MobiFlight Multiplexer Breakout Board as daisy chain.
- Pin1 - GND
- Pin2 - VCC
- Pin3 - Channel 1
- Pin4 - Channel 2
- Pin5 - Channel 3
- Pin6 - Channel 4
Connection coming from your Mobiflight board.
- Pin1 - GND
- Pin2 - Signal pin (for the first 74HC4067)
Connection coming from your Mobiflight board.
- Pin1 - GND
- Pin2 - Signal pin (for the second 74HC4067)
Connection to daisy chain another MobiFlight Multiplexer Breakout Board.
- Pin1 - GND
- Pin2 - VCC
- Pin3 - Channel 1
- Pin4 - Channel 2
- Pin5 - Channel 3
- Pin6 - Channel 4
First row of connectors for input devices buttons and switches:
- Pin1 - Connection TO switch
- Pin2 - Connection FROM switch
Polarity doesn't matter for switches.
Second row of connectors for input devices buttons and switches:
- Pin1 - Connection TO switch
- Pin2 - Connection FROM switch
Polarity doesn't matter for switches.
First row of connectors for input devices buttons and switches:
- Pin1 - Connection TO switch
- Pin2 - Connection FROM switch
Polarity doesn't matter for switches.
Second row of connectors for input devices buttons and switches:
- Pin1 - Connection TO switch
- Pin2 - Connection FROM switch
Polarity doesn't matter for switches.
As one can see on the picture, the 74HC4067 are mounted with the silkscreen facing up. Due to the asymmetric connectors, the orientation cannot be confused.
The multiplexer prototyping board is designed to work best together with the MobiFlight Prototyping Board. Of course, you can also connect it directly to any of the supported microcontrollers.
The prototyping board comes with the required cables to make connection super easy.
- Connect the 6-pin wire from the breakout board to the MobiFlight Prototyping Board's 6-pin connector labeled Stepper 2 / Multiplexer
- Connect the 2-pin wires to the MobiFlight Prototyping Board's 2-pin connectors Btn1 and Btn2 respectively
- Upload multiplexer board configuration to the MobiFlight Prototyping Board - Download multiplexer-config (mfmc)
All pins on the multiplexer will now work correctly!
If you are using any of the supported microcontrollers, do the following:
- Connect the first two pins on the Multiplexer In connector to GND, 5V and the four remaining pins to free output-capable pins. For an Arduino Mega that could be, eg. D2, D3 D4 and D5.
- Connect two input-capable pins to Data0 and Data1 connectors - first pin is GND and is not necessarily required, second pin is data pins. You can verify by looking on the backside of the circuit board where the pins are labeled.
You should first add one multiplexer device with the four data pins configured as follows, and select also the pin connected to Data0. Data1 will be assigned to a another Multiplexer device we add after this one.
For the second multiplexer add another multiplexer device from the menu, the four selector pins will be the same, and the data pin will a unique one for the second multiplexer, D7 for example.
Click "Upload config" and your device should work.
This information will be added soon.
You can print a case for the board using this STL file for better handling and look:
