Used external 12Vdc power adapter somewhere from scrap equipment.
Components and materials:
Except the two LM386, all components, wires, pins, connectors are scrap from old electronic equipment taken from local disposal e-bins.
Adjustments, connectors and switches:
— Sliding power Switch (at left below red power light led indicator)
— Push on/off Loudness switch (at right), operates both channels.
— Trimpot (Yellow) for each LM386 turns up/down gain.
— Trimpot (Blue) raises up/down the brightness of blue led light inside the wood. This wood "cavern" is natural, i didn't sculpted it.
— RCA connectors on the Left are inputs
— RCA connectors on the Right are outputs
LM386 cost 0,80€ each.
Wild Olive tree, Olea maderensis, caught from the ground probably after a storm. (I do not cut trees or branches. I do sow and plant them)
+/- one week