The Andromeda is an ODR-1 overdrive. It features 4 controls. Gain controls the amount of gain from the op amp that is fed through the feedback clipping diodes. Level is the output level of the effect. Bass allows you to adjust the bass response of the circuit. The stock ODR-1 circuit is the equivalent of having the Bass knob turned all the way up.
The dimensions of this pcb are 49,5mm x 49,5mm. It is also available as ready to solder kit:
This project is by Aion Electronics. Since the modifications featured in this project require some basic knowledge, this project is rather for more experienced builders.
Here is the direct link to the manual with layout and schematic:
Here you can find build reports on this project: Build Reports