Unlike the v0.7, the mainboard v0.8 is a double layer PCB.

Be aware that there are 2 silkscreen errors on it:

1. The BC547 transistor must be welded reversed (EBC -> CBE).
2. The ATTINY4314 is a 4313 instead.

There are some new components on it:

• The ATtiny4313 together with the 16 MHz crystal are used for the USB MIDI output.

• The IC7 SN74HC595 is used to have more LCD controls.

• The IC8 TL780-05 voltage regulator.

There is a Teensy 3.1/3.2 support but it was not tested.

Step 1 - Resistors and diodes

Step 2 - IC Sockets, Crystal and Ceramic Capacitors

Step 3 - Pin Strip Headers

Step 4 - 78005 Voltage Regulator and 10µF Electrolytic Capacitors