by Augustica.com » 10 Dec 2013, 17:46
The Dejavu's PCB has a four prong connector K1. The prongs are marked as GND, +5V, RIN, and LIN. GND and +5V and connected to the ground bus and +5V bus of your power supply. The RIN and LIN prongs of K1 are connected to the right and left channels of your amplifier respectively. Dejavu is designed to be used with a preamplifier and/or a headphone amplifier and therefore requires a very low voltage (20 mVolt) to activate each of the 16 LEDs. A "full scale deflection" (all 16 LEDs activated) will require a signal of about 320 mVolt.
DO NOT connect Dejavu to a an output of a power amplifier. You will destroy it.