Guitar Volume/Expression Pedal
Description
This is a volume pedal for electric guitar. It has been designed to be very strong for a 3D printed pedal and the belted mechanism is consistent and reliable. It also has mounting holes in the back so you can add a 3 pin 6.5mm jack for it to be used as an expression pedal, and there is a hole for a switch so you can switch between the 2 modes. You will need: A short length of GT2 6mm wide belt. A 16 Tooth 6mm wide GT2 pulley with a 6mm bore. 2x 6.5mm mono jacks. Wire 1 or 2 springs - 1" long, 5mm diameter. 2x M6 lock nuts 2x 25mm M6 Bolts 13x M3 lock nuts 12x 10mm M3 Bolts 5x 30mm M3 Bolts 4x Smooth 20 Tooth 6mm wide GT2 pulleys Aluminium foil for shielding. A potentiometer - Although any 250K/500K pot will work, I recomend using a Dunlop super pot because they are high quality. https://www.jimdunlop.com/super-pot-250k-solid-shaft-potentiometer/ Cheaper pots can be unreliable. Optional for expression pedal mode: A stereo 6.5mm jack DPDT toggle switch The springs are used to tension a lever which keeps the belt tight for the whole travel of the pedal. I used 1 spring, but there is provision for 2 springs if you use weaker springs.
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