Alesis MMT-8 User Manual download pdf (Page 4)

Making the Encoder board

1) Cut a piece of veroboard strip to the size shown below:

2) Take 4x 10k resistors and solder one end of them together. Solder the other loose ends to the veroboard in the

position on the board as shown below:

3) Take a 9” length of rainbow cable and peel out a section of the colours blue-green-yellow-orange. Solder one

end of these wires to the veroboard. Solder the other ends to the rotary encoder terminals. It will have its

terminals marked with the numbers 1, 2, 4 and 8, and also 2 middle ones marked “C”.

The blue wire should go to the terminal marked “1”.

The green wire should go to the terminal marked “2”.

The yellow wire should go to the terminal marked “4”.

The orange wire should go to the terminal marked “8”.

Solder a purple wire to one of the encoder terminals marked “C” (it doesn’t matter which one).

Use heat shrink insulation tubing to cover all the bare soldered terminals of the encoder.

4-bit Rotary Encoder (underside view)

8 1

C C

2 4

1 2 3 4 5 6 7 8 9 ... 12 13

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Alesis MMT-8 User Manual Page 4