Make: Online : Halloween sounds from guitar effects + photocell mod

Halloween sounds from guitar effects + photocell mod

This installment of EHX's Effectology series outlines a variety of methods for using their stompboxes to create some rather convincing spookiness. Clever work, but the real highlight is the simple schematic for light control seen @ the 3:45 mark.

A photocell soldered between the ground and tip/sleeve terminals of a 1/4" plug is then connected to the expression pedal input of a self-oscillating EQ effect - instant photo-theremin. nice.

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